Which of the following statements is NOT true concerning the decomposition of a simple binarycompound?A) The products are unpredictable.B)The products are the constituent elements.C)Energy is usually required.D)The reactant could be an ionic or a molecular compound.E) The reactant is a single substance

Answers

Answer 1

Step 1 -

A decomposition reaction is a reaction in which a compound is decomposed, i.e., we usually heat a substance thus forming new substances, such as gaseous substances.

Generally speaking, a decomposition reaction will involve only one reactant: the substance to be decomposed.

[tex]\text{reactant}\to\text{ product 1 + product 2 + }\ldots[/tex]

Step 2 - Examples of decomposition reactions

Let's take a closer look at some examples:

[tex]\begin{gathered} ZnCO_3\to ZnO+CO_2 \\ 2Al_2O_3\to4Al+3O_2 \\ H_2CO_3\to H_2O_{}+CO_2 \\ NH_4NO_3\to N_2O+2H_2O \end{gathered}[/tex]

We can already state some conclusions:

a) The products are not always the same. They depend on the reactant. Therefore, they are not always predictable.

b) The reactant can be an ionic compound (such as ZnCO3) but also a covalent compound (such as H2CO3).

c) The reactant does not decompose into its constituent elements.

Step 3 - Finding the wrong answer

Therefore, the only wrong answer is item b), the products are the constituent elements.


Related Questions

Which is the formula for calculating the mass number of an atom?

A protons + neutrons


B quarks + protons


C protons + electrons


D neutrons + electrons

Answers

Answer:

A: protons + neutrons

Explanation:

protons and neutrons both have the same mass. Their mass is much greater than the mass of an electron so it is deemed negligible

what is the ph of a 0.0520 M solution of HI

Answers

Since hydroiodic acid is a strong acid and completely dissociates, we can use this formula:

pH = -log[H+]

pH = -log[0.0520]

pH = 1.284

which hypothesis of thomson’s atomic model was later found to be not true by rutherford and why

Answers

The distribution of positive and negative particles was not uniform. This hypothesis of Thomson’s atomic model was later found to be not true by Rutherford.

Because positive charge particle is in center and the negative charge particle is surround to it.

J.J. Thomson proposed that an atom is a definitely charged sphere wherein negatively charged electrons are embedded in it. Neils Bohr proved it to be false as the mass of any atom is localized inside the middle of an atom which is positively charged even as negatively charged electrons revolve across the effective center.

Thomson was incorrect due to the fact he assumed that the positive charge of an atom become all one uniform blob of count number with the electrons transferring in orbits inside the nucleus. If Thomson's model had been accurate, the alpha particles could skip thru the atomic shape of the foil unimpeded.

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If 4.02g of hydrogen and 32.00 of oxygen react completely to form water, what will be the mass of the water produced? Which scientific law dictates this?

Answers

Answer:

40.04g

Explanation:

the water has one molecule of hydrogen and two molecules of oxygen(H20)

(4.02)(2)(32)

Upon combustion, a 0.8009 g
g
sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6004 g
g
CO2
C
O
2
and 0.6551 g
g
H2O
H
2
O
. Find the empirical formula of the compound.

Answers

The empirical formula of the compound is mathematically given as

C2H4O

This is further explained below.

What is the empirical formula?

Generally, The empirical formula of a chemical compound is the most straightforward representation of the atom counts in the molecule as whole numbers.

As a straightforward illustration of this idea, consider the empirical formula of sulfur monoxide, which is denoted by the symbol SO, and compare it to the empirical formula of disulfur dioxide, which is denoted by the symbol S2O2.

moles of CO_2=[tex]\frac{ 1.6004 }{44.01}[/tex]

moles of CO_2= 0.0364 moles

moles of H_2O=[tex]\frac{0.6551}{ 18.01 }[/tex]

moles of CO_2= 0.0364 moles

It takes 0.0364 moles of carbon to make up 1 mole of carbon dioxide.

1 mole of H2O contains 2 moles of hydrogen, which is equal to 2 times 0.0364, or 0.0728 moles of hydrogen.

C & H = 0.0364 x 12.01

C & H= 0.437 g C

0.0728 x 1.008 = 0.0734 gH

Mass O = 0.8009 -(0.437 + 0.0734)

Mass O= 0.2905 g

O moles=[tex]\frac{0.2905}{16}[/tex]

O moles= 0.0182 moles

C = [tex]\frac{0.0364}{ 0.0182}[/tex]

C= 2

H =[tex]\frac{0.0728}{ 0.0182}[/tex]

H = 4

O =[tex]\frac{0.0182}{ 0.0182 }[/tex]

O= 1

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You have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify which reactants and products are soluble/insoluble in water. H2SO4+ Ba(OH)2 =

Answers

Sulfuric acid is a strong acid, which means it can dissociate completely when dissolve in water. In other words, the reactant H2SO4 is completely soluble in water, otherwise, it wouldn't be a strong acid.

On other hand, the second reactant Ba(OH)2 is soluble in water because it's a strong base, which are bases that completely dissociate when dissolve in water.

Therefore, sulfuric acid (H2SO4) is soluble in water and the barium hydroxide (Ba(OH)2) is also soluble in water.

The investigators were able to determine that the footprints were made by a Nike, size 10 tennis shoe; however, they couldn’t match it exactly to the suspect’s shoe. What is TRUE about this piece of evidence?

A.
They were unable to find class nor individual characteristics.

B.
They were only able to find class characteristics.

C.
They were only able to find individual characteristics.

D.
They were able to find both class and individual characteristics.

Answers

Answer

the correct answer would be A

Explanation:

They were unable to find class nor individual characteristics.

how many grams of silver iodide, AgI, are produced from 43.3 g of calcium iodide, CaI2?

Answers

Taking into account the reaction stoichiometry, 121.89 grams of AgI are produced from 43.3 g of calcium iodide.

Reaction stoichiometry

In first place, the balanced reaction is:

CaI₂ + 2 AgNO₃ → 2 AgI + Ca(NO₃)₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

CaI₂: 1 moleAgNO₃: 2 molesAgI: 2 molesCa(NO₃)₂: 1 mole

The molar mass of the compounds is:

CaI₂: 166.9 g/moleAgNO₃: 169.87 g/moleAgI: 234.77 g/moleCa(NO₃)₂: 164 g/mole

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

CaI₂: 1 mole ×166.9 g/mole= 166.8 gramsAgNO₃: 2 moles ×169.87 g/mole= 339.74 gramsAgI: 2 moles ×234.77 g/mole= 469.54 gramsCa(NO₃)₂: 1 mole ×164 g/mole= 164 grams

Mass of AgI formed

The following rule of three can be applied: if by reaction stoichiometry 166.8 grams of CaI₂ form 469.54 grams of AgI, 43.3 grams of CaI₂ form how much mass of AgI?

mass of AgI= (43.3 grams of CaI₂×469.54 grams of AgI)÷ 166.8 grams of CaI₂

mass of AgI= 121.89 grams

Finally, 43.3 grams of CaI₂ form 121.89 grams of AgI.

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The atomic radius of carbon is 77 pm, and the atomic radius of sulfur is 103 pm. What is the circumference of each atom?

Answers

Answer:

Circumference of carbon = 483.56 pm

Circumference of sulphur = 1111.56 pm

Explanation:

The circumference is the length of any great circle, the intersection of the sphere with any plane passing through its centre.

For carbon atom:

Atomic radius = 77 pm

Circumference = 2πr

=2 X 3.14 X 77

=154 X 3.14

Circumference of C = 483.56 pm

For sulphur:

Atomic radius = 177 pm

Circumference = 2πr

=2 X 3.14 X 177 pm

=1111.56 pm

Circumference of sulphur = 1111.56 pm

Hence,

The circumference of Carbon is 483.56 and the circumference of sulphur is 1111.56 pm.

The atomic radius of carbon is 77 pm, and the atomic radius of sulfur is 103 pm. What is the circumference of each atom?

ANSWERCARBON - 483.56SULFUR - 646.84

FORMULA

[tex]c \: = 2\pi\:r[/tex]

CARBON

C = 2(3.14)(77)

C = 6.28 × 77

= 483.56

SULFUR

C = 2(3.14)(103)

C = 6.28 × 103

= 646.84


Helpppp

Use the reaction below to solve this problem.

Answers

68.7mL
Explanation:
• 1st. we write the reaction
2HCI(ag) + Ca(OH)2(s)
› CaCI2 (ag) + 2H20
(1).
2ns, we find moles of Ca(OH)2
moles= concentration x volume = 0.125mol/L
X0.05L=6.25X10^-3moles
• we find moles of HCI
mole ratio between HCI and Ca(OH)2 is 2:1
thus moles of HCI=2/1 x
6.25X10^-3moles=1.25x10^-2moles
• we find volume of HC
the concentration is 0.182mol/L
we know that 1L=0.182mol
thus =1.25X10^-2moles / 0.182mol x
1L=0.0687L
Volume of HCI required is 68.7mL

A solution is made by mixing 84. g of water and 100. g of hexane ()Calculate the mole fraction of water solution .

Answers

The mole fraction of the water solution is 0.77.

The mole fraction or molar fraction is defined as a unit of the quantity of a constituent, nᵢ, divided by the total quantity of all parts in a combination.

Moles of water = given mass/ molar mass

Moles of water = 84/18

Moles of water = 4.6

Moles of hexane =  given mass/ molar mass

Moles of hexane = 100/76

Moles of hexane = 1.3

Total moles = Moles of water + Moles of hexane

Total moles = 4.6 + 1.3 = 5.9

Mole fraction of water = Moles of water / Total moles

Mole fraction of water = 4.6/5.9

Mole fraction of water = 0.77

Hence, the Mole fraction of water is 0.77.

The mole fraction is the same as the mole percent however in a specific shape in chemistry. Inside the given combination, the range of moles of one constituent is divided by the total number of moles is referred to as the mole fraction. Multiplying the mole fraction of the thing by then we gain the mole percentage of the aspect.

Mole fraction is a unit of awareness, described to be equal to the range of moles of an aspect divided through the whole wide variety of moles of a solution. Because it's miles a ratio, the mole fraction is a unitless expression.

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Law of conservation of mass 21 g of A and 21 g of b produce 17 g of c

Answers

The fact that 21 g of A and 21 g of B produce 17 g of C does not obey the law of conservation of mass.

What is the law of conservation of mass?

The law of conservation of mass states that the mass of a substance can neither be created nor destroyed.

This law further explains that in a chemical reaction, the amount of reactants must be equal to the amount of products in the reaction.

For example, if a substance A of mass 21g reacts with another substance B of mass 21g, the mass of the product C should be 21g + 21g = 42g in order to align with the law of conservation of mass.

However, according to this question, the product C has a mass of 17g, which shows that the law of conservation of mass is not obeyed.

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How is related the calorific capacity of a substance with its temperature?

Answers

The calorific capacity of a substance related to the temperature when specific heat of a substance ∆Q changes.

What is specific heat?

Specific heat is defined as the heat required to raise the temperature of 1 gram of a substance by one degree.

Specific heat = q/(∆T × mass of the substance)

What is Heat capacity?

Heat Capacity is defined as the amount of heat required to raise the temperature of the system by one degree.

Units of heat capacity :

The unit of heat capacity are joule/kelvin or joule/Celsius.

Heat capacity at constant volume = dU/dTHeat capacity at constant pressure = dH/dT

Thus, we concluded that the calorific capacity of a substance related to the temperature when specific heat of a substance ∆Q changes.

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A bicyclist is stopped at the entrance to a valley, as sketched below. Where would the bicyclist have the highest potential energy? Where would The bicyclist have the lowest potential energy? Where would bicyclist have the highest kinetic energy? Where would the bicyclist have the highest speed winning? Conversation with the bicyclist’s Kinetic energy be higher at A or B? With a bicycle is potential energy be higher at A or B? What’s a bicyclist total energy we hire at A or B? Supposed to bicyclist lets off the brakes and coast down into the valley without peddling. Even if there was no friction or air resistance to slow her down, what is the farthest point the bicyclist could reach without peddling?

Answers

Step 1 - Understanding the relation of potential energy, kinectic energy and the conservation of energy

The potential energy is the energy related to a body that can start moving under the influence of a force anytime soon.

The kinf of potential energy depends on the force that could act on the body. When a body is lifted, because gravity can pull it back, we say that this body has gravitational potential energy

Kinetic energy, on the other hand, is related to actual movement. It depends on the mass as well as on the velocity of the body. When we lift an object and drop it next, all the potential energy will be converted to kinetic energy, i.e., the velocity of the object we dropped will be also proportional to the height. It cannot gain more energy.

Step 2 - Interpreting the problem

Now that we know how potential and kinetic energy work, we can start working on the problem. Since potential energy is directly proportional to height, the highest potential energy would be attained at F.

The lowest potential energy, on the other hand, woud be attained at D, i.e., the smaller height.

The highest kinetic energy would be attained when all the potential energy is converted to kinetic energy, i.e., when the bicyclist, starting at A, loses its potential energy reaching D

The speed is directly proportional to the kinetic energy: the higher the speed, the higher the kinetic energy. Since the kinetic energy, as we saw, is the greatest at D, the velocity will also be the greatest at this point.

12) When the pH of a solution decreases, what does that mean for the hydrogen ion concentration?

Answers

When the pH of a solution decreases, hydrogen ion concentration increases

The overall concentration of hydrogen ion is inversely related to its pH and can be measured on the pH on the pH scale which is from 1 to 14 and therefore the more hydrogen ions present, the lower the pH conversely the fewer hydrogen ions the higher the pH as the concentration of hydrogen ion is logarithmically inversely proportional to pH and pH of solution is decreased then hydrogen ion concentration will increase by the power of 10

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X If I want to measure the mass of a fly in metrics, What should I use

Answers

If want to measure the mass of a fly in metrics use a scale or a balance.

What is the most used metric system?

The current international standard metric system and the one that is most generally used worldwide is the International System of Units (Système international d'unités, or SI). It is a development of Giorgi's MKSA system, with the meter, kilogram, second, ampere, kelvin, candela, and mole as its fundamental units.

What tool should you use to measure mass?

A balance is used to estimate an object's mass for the majority of commonplace objects. The balance compares the target object to a known mass object. Digital scientific balances and beam balances, like a triple beam balance, are examples of several sorts of balances.

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Hello, can you give me a concept of what anhydrides are and examples, please?​

Answers

Anhydrides :

Anhydrides are binary substances or compounds that are the result of a nonmetal with oxygen.

I leave you 2 steps to make the anhydrides:

1: To make anhydrides, write your nonmetal symbol followed by oxygen.

2: The oxidation numbers must be the same and for this the exchange of oxidation numbers or valence between its non-metallic element and Oxygen is used.

Examples of anhydrides:

1: Chlorous anhydride

[tex]\bold{ \: Cl + O₂ \rightarrow \: Cl₂ O₃}[/tex]

Keep in mind that when it ends in OSO we look for its valence, which in this case would be +3.

2: Iodic anhydride

[tex]\bold{ \: I + O₂ \rightarrow \: I₂ \: O₅}[/tex]

We take into account its symbol that in this would be me and to solve it we must look for its valence that in this case ends in ICO which is already known that its ICO valence is +5.

3: Per bromic anhydride

[tex]\bold{\:Br + O₂ \rightarrow \:Br₂ \:O₇}[/tex]

We take into account its symbol, which in this case would be Br, and to solve it we must find its valence, which in this case ends in ICO, which is already known to have an ICO valence of +7.

The Table of metals and non-metals is attached.

Solid/liquid/gas
Element/mix/compound
Because........

Answers

Answer:

why alkali metal are called as most reactive elements?

I need help with the following question

Answers

The right answer is (KP)-1/2. Option A.

An expression of the equilibrium constant in terms of partial pressure is denoted as Kp. The equilibrium constant Kp is equal to the partial pressure of the product divided by the partial pressure of the reactant, and the partial pressure increases with a force equal to the coefficient of the substance in the equilibrium equation.

Kp is the equilibrium constant used to express equilibrium concentrations at atmospheric pressure and Kc is the equilibrium constant used to express equilibrium concentrations in molar terms. The relationship between Kp and Kc depends on the change in the number of moles of gaseous reactants and products. Kp has exactly the same form as Kc but partial pressure is used instead of concentration. Gases to the right of the formula are at the top of the print, and gases to the left are at the bottom.

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Sulfur and fluorine react in a combination reaction to produce sulfur hexafluoride:

S (s) + 3F2(g) → SF6 (g)

The maximum amount of SF6 that can be produced from the reaction of 32.1 g of sulfur with 114g of fluorine is ________ g.

Answers

Taking into account the reaction stoichiometry, the maximum amount of SF₆ that can be produced from the reaction of 32.1 g of sulfur with 114 g of fluorine is 146.46 grams.

Reaction stoichiometry

In first place, the balanced reaction is:

S + 3 F₂  → SF₆

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

S: 1 molesF₂: 3 molesSF₆: 1 mole

The molar mass of the compounds is:

S: 32 g/moleF₂: 19 g/moleSF₆: 146 g/mole

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

S: 1 mole ×32 g/mole= 32 gramsF₂: 3 moles ×19 g/mole= 57 gramsSF₆: 1 mole ×146 g/mole= 146 grams

Limiting reagent

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.

Limiting reagent in this case

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 57 grams of F₂ reacts with 32 grams of S, 114 grams of F₂ reacts with how much mass of S?

mass of F₂= (114 grams of F₂× 32 grams of S)÷ 57 grams of F₂

mass of F₂= 64 grams

But 64 grams of F₂ are not available, 32.1 grams are available. Since you have less mass than you need to react with 114 grams of F₂, S will be the limiting reagent.

Mass of SF₆ formed

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 32 grams of S form 146 grams of SF₆, 32.1 grams of S form how much mass of SF₆?

mass of SF₆= (32.1 grams of S× 146 grams of SF₆)÷ 32 grams of S

mass of SF₆= 146.46 grams

Finally, 146.46 grams of SF₆ can be produced from the reaction of 32.1 g of S with 114 g of F₂.

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4. A balloon filled with 2 L of air is at 313 K. Suppose the temperature increases to 600 K. Calculatewhat happens to the volume of the balloon.

Answers

According to Charle's law, a balloon at 600 K has a volume of 3.83 L.

Describe Charles's law.

Charles' law states that, under constant pressure, the volume a given amount of gas fills is directly proportional to its absolute temperature. For instance, when the temperature drops during the winter, a basketball placed outside in the ground would contract.

Mathematically, Charles' law can be written as V1/T1 = V2/T2, where V1 denotes the volume at the beginning, T1 the temperature at that point, and V2 the volume at the end with T2 the temperature at that point.

The following examples of how Charles' law is applied in real life:

Helium balloons shrink when it's cold outside.

From Charles' law, V/T = constant

V₁/T₁ = V₂/T₂

or, 2/313 = V₂/600

or, V₂ = (2x600)/313

          = 3.83

Hence, form Charles' law we conclude the volume of balloon at 600 K is 3.83 L.

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The drawing shows Earth's revolution around the Sun.

Based on the drawing, what season are students in Florida experiencing when Earth is at position 1?

Answers

According to the image, it can be inferred that the students in Florida are in summer when the earth is in position 1.

What relationship does the movement of the earth have with the seasons?

The seasons are a term that refers to each of the periods of time in which the year is divided, with a duration greater than the months, characterized by the typical behavior of some meteorological variable. They occur cyclically and inverted between one hemisphere and another.

In general, the seasons are divided in this way:

Position 1: June 21 - September 23

Boreal Summer

I invest Austral

Position 2: September 23 - December 21

boreal autumn

southern spring

Position 3: December 21 - March 21

boreal winter

Ausral Summer

Position 4: March 21 - June 21

boreal spring

southern autumn

According to the above, it can be inferred that in position 1 the students from Florida will be in the summer season because Florida is in the boreal hemisphere of the earth (Northern hemisphere).

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What is TRUE about soil used as evidence in forensic science?

A.
It only includes dirt.

B.
It may include pieces of asphalt.

C.
It only includes natural substances.

D.
It cannot be used in a criminal case.

Answers

The statement 'It may include pieces of asphalt' is TRUE about soil used as evidence in forensic science (Option B).

What is forensic science?

Forensic science is a sub-discipline aimed at solving police cases based on evidence found at the crime scene, thereby being a key part of a police investigation. in this sense, pavement structural evaluation may result very useful in forensic science.

Therefore, we can conclude that forensic science is based on evidence found in the crime scene, which may include evidence in the asphalt ([pavement) that is collected by investigators in order to analyze it.

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Answer: B

Explanation:

Hydrochloric acid reacts with zinc, giving zinc chloride and hydrogen.Also,hydrochloric acid in concentrated aqueous solution undergoes electrolysis (with electrodes inert).
Define:
a) the mass in grams of the product in the cathode, if there are 0.5 mol/100 ml of HCl in the solution;
b) boiling under normal conditions of the gas obtained in the anode, if the pH of the acid is 2;
c) the mass in grams of the metal obtained in the cathode (electrolyzed glass), if the salt of zinc is formed by the interaction of 3.65 g of hydrochloric acid with zinc.

Answers

Hydrochloric acid reacts with zinc, giving Hydrogen gas and zinc chloride.

What occurs to zinc when zinc and hydrochloric acid interact?An aqueous solution of hydrogen chloride is hydrochloric acid, often called muriatic acid. It is a colorless solution with an overpowering odor.Hydrogen gas and zinc chloride are quickly formed when zinc and hydrochloric acid interact.Zinc metal displaces the hydrogen in a single displacement process to produce zinc chloride and hydrogen gas. Because the related reaction is exothermic, a significant amount of heat is produced: ZnCl2(aq) + H2 + Zn (s) + 2HCl (g)

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Based on the diagram, describe the relationship between the deer population and biodiversity in forest c

Answers

Not adversely but deer population do effects the biodiversity in a way that plant diversity specifically get reduced.

What is biodiversity and how deer population effects the biodiversity?Biodiversity refers to the population of all plants and animals living on the earth along with other species.Now deer population is a bane and a boon both to the natural ecosystem, to the diverse unification of species on Earth.Deer in the forest eat the plants that tastes good and leave the ones that do not , even if it is the product or leaves of the same plants.This led to trouble in colonial growth of plants again , which reduces plants in that area.And deer population in every possible forest suffers this issue and collectively it accounts for a big biodiversity reduction.

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imagine you are given a piece of gold and piece of copper both pieces have a volume of 45 cm3,explain which piece of metal would have the larger mass

Answers

Out of gold and copper, gold metal would have larger mass.

What is molar mass?

The mass of any chemical substance divided by the volume of the material is known as the molar mass of that compound.

Given:  The value of volume is same for both the metals = 45

The value of the volume is the same for both the metals = 45 cm3

By using formula of density i.e = mass/volume

Since the volume is the same

The density is directly proportional to the mass.

From the periodic table,

The mass of gold = 196.9 u

The mass of copper = 63.5 u

Since the volume is the same, we consider only the absolute masses value

Hence, gold is heavier than copper metal

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The line N is at a wavelength of 590 nm. Calculate the frequency of this light in Hertz

Answers

Answer:

5.08 x 10¹⁴ Hz

Explanation:

To find the frequency, you need to use the following equation:

f = c / λ

In this equation,

-----> f = frequency (Hz)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> λ = wavelength (m)

After converting the wavelength from nm to m, you can plug the given values into the equation and solve for "f".

 590 nm                     1 m
----------------  x  ------------------------  =  5.90 x 10⁻⁷ m
                              1 x 10⁹ nm

f = c / λ                                                              <----- Given equation

f = (3.00 x 10⁸ m/s) / (5.90 x 10⁻⁷ m)                <----- Insert values

f = 5.08 x 10¹⁴ Hz                                             <----- Divide

Consider the reaction.2 Pb(s) + O₂(g) →→→ 2 PbO(s)->An excess of oxygen reacts with 451.4 g of lead, forming 316.9 g of lead(II) oxide. Calculate the percent yield of the reaction.

Answers

In this question, we have the following reaction:

2 Pb + O2 -> 2 PbO

We have to find the percent yield of this reaction, we have:

451.4 grams of Pb

316.9 grams of PbO, this is the actual yield, we will have to find the theoretical yield now

In order to find the theoretical yield, we need to know how many moles of Pb we have in 451.4 grams, the molar mass of Pb is 207.2g/mol

207.2g = 1 mol

451.4 g = x moles

207.2x = 451.4

x = 451.4/207.2

x = 2.18 moles of Pb in 451.4 grams

According to the molar ratio of Pb and PbO, we have the ratio of 2 moles of Pb to form 2 moles of PbO, therefore if we have 2.18 moles of Pb, we will also have 2.18 moles of PbO.

Now we need to find the theoretical mass of PbO, using its molar mass, 223.2g/mol

223.2g = 1 mol

x grams = 2.18 moles

x = 2.18 * 223.2

x = 486.6 grams of PbO is the theoretical yield

Now to find the percent yield, we need to use the following formula:

%yield = (actual yield/theoretical yield)*100

%yield = (316.9/486.6)*100

%yield = 65

The percent yield of this reaction will be 65%

Help me PLEEEEEAAASSEE ASAP I BEG YOU IF YOU KNOW THE ANSWER Which compares the effectiveness of methane and nitrous oxide as a greenhouse gas with that of carbon dioxide. Both methane and nitrous oxide are more effective greenhouse gases than carbon dioxide.
Both methane and nitrous oxide are more effective greenhouse gases than carbon dioxide.


Neither methane nor nitrous oxide is a more effective greenhouse gas than carbon dioxide.

Neither methane nor nitrous oxide is a more effective greenhouse gas than carbon dioxide.


Only methane is a more effective greenhouse gas than carbon dioxide.

Only methane is a more effective greenhouse gas than carbon dioxide.


Only nitrous oxide is a more effective greenhouse gas than carbon dioxide.

Only nitrous oxide is a more effective greenhouse gas than carbon dioxide.

Answers

Both methane and nitrous oxide are more effective greenhouse gases than carbon dioxide.

Measured over twenty years methane is eighty times more powerful than carbon dioxide and causes global warming, while nitrous oxide is 280 times more powerful. During the industrial age, carbon dioxide caused about 10 times more warming than nitrous oxide. But laughing gas is stronger. One pound of gas heats the atmosphere about 300 times more than one pound of carbon in 100 years.

Water vapor is the most powerful greenhouse gas in the Earth's atmosphere and plays a unique role among them. The amount of water vapor in the atmosphere is usually not directly changed by human actions. It depends on the air temperature. Compared to other anthropogenic greenhouse gases, carbon dioxide CO2 has the largest relative contribution to the increase in the greenhouse effect.

Learn more about A greenhouse here:-https://brainly.com/question/20349818

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i need help with chemistry equation

Answers

Answer:

86400

Explanation:

24*24*69seconds

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