PLZ
how many molecules are in 2so4​

Answer:

26

Explanation:

The number of electrons and protons are equal.

Answer:  B

a chemical change, because a gas is being formed

Explanation:

Answer:

B

Mark Brainliest please

Explanation:

Answer:

wouldnt they still have the same density?

Explanation:

for example, the density of iron is 7.874 g/cm^3 no matter how big the piece is. I hope this helps.

Answer: The average kinetic energy is proportional to the absolute temperature of the gas. Gas particles are in random motion. Gas particles have no volume. And the collisions between gas particles are elastic.

Explanation: I heard this question before, I think. Hope this helps!

Answer:

Most of these rocks are not made up of common geometric shapes

Explanation:

Because most rocks are not made up of common geometric shapes, it would be difficult or impossible to find the volume of a rock using a ruler; there would be no easy way to measure the rock's volume using a ruler

Hope this helped!

Identify the type of solid from the description. Select from the following choices: metallic solid, network solid, molecular solid, ionic solid, or amorphous solid. a. This solid is ductile and conducts electricity.b. This solid is not conductive and has a low melting point.

Answer:

See explanation

Explanation:

A is a Metallic Solid

Let us look again at the physical properties of metals;

Metals are

We can now see that both ductility and electrical conductivity are metallic properties.

B is a Molecular solid

Molecules are formed when atoms share electrons. In molecules, there are no free electrons hence molecules do not conduct electricity.

Secondly, molecules are held together in the solid state by weak dispersion forces hence molecular solids have a low melting point.

Answer:

17.031 g/mol

Explanation:

Answer:

Gallium

Explanation:

Answer:

Gallium

Explanation:

Answer:

24 silver atoms.

Explanation:

11.5 moles of silver atoms will have = 11.5×6.022×1023=6.925×1024 11.5 × 6.022 × 10 23 = 6.925 × 10 24 silver atoms.

Hope this helps!

Brain-List?

According to Avogadro's number, there are 6.926×10²⁴ representative particles in 11.5 moles of silver.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number or number of moles×Avogadro's number=11.5×6.023×10²³=6.926×10²⁴ atoms.

Thus, there are 6.926×10²⁴ representative particles in 11.5 moles of silver.

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Answer:

The moles of PH₃ produced are 0.2742 and the total number of moles of gas present at the end of the reaction is 0.6809.

Explanation:

Phosphorus reacts with H₂ according to the balanced equation:

P₄ (s) + 6 H₂ (g) ⇒ 4 PH₃ (g)

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

Being the molar mass of the compounds:

The following mass amounts of each compound participate in the reaction:

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:

P * V = n * R * T

In this case you know:

Replacing:

2 atm*10 L= n*0.082 [tex]\frac{atm*L}{mol*K}[/tex] *298 K

and solving you get:

[tex]n=\frac{2 atm*10 L}{0.082\frac{atm*L}{mol*K}*298 K }[/tex]

n=0.818 moles

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, you can use a simple rule of three as follows: if 6 moles of H₂ react with 124 g of P₄, 0.818 moles of H₂ with how much mass of P₄ will it react?

[tex]mass of P_{4}=\frac{0.818 moles of H_{2}*124 grams of P_{4}}{6 moles of H_{2}}[/tex]

mass of P₄= 16.90 grams

But 16.90 grams of P₄ are not available, 8.50 grams are available. Since you have less mass than you need to react with 0.818 moles of H₂, phosphorus P₄ will be the limiting reagent.

Then you can apply the following rules of three:

[tex]moles of PH_{3} =\frac{8.5 grams of P_{4}*4 moles of PH_{3} }{124grams of P_{4}}[/tex]

moles of PH₃=0.2742

[tex]moles of H_{2} =\frac{8.5 grams of P_{4}*6 moles of H_{2} }{124grams of P_{4}}[/tex]

moles of H₂= 0.4113

If you have 0.818 moles of H₂, the number of moles of gas H₂ present at the end of the reaction is calculated as:

0.818 - 0.4113= 0.4067

Then the total number of moles of gas present at the end of the reaction will be the sum of the moles of PH₃ gas and H₂ gas that did not react:

0.2742 + 0.4067= 0.6809

Finally, the moles of PH₃ produced are 0.2742 and the total number of moles of gas present at the end of the reaction is 0.6809.

The ideal gas equation gives the approximate amount of PH₃ produced

and the gas at the conclusion as 0.28 and 0.69 moles respectively.

Response:

First part:

Second part:

Given:

Mass of phosphorus = 8.50 g

Pressure of hydrogen gas, P = 2.00 atm

Volume of hydrogen gas, V = 10.0–L

Temperature of the gas, T = 298 K

First part:

From the ideal gas equation, P·V = n·R·T, we have;

[tex]Number \ of \ moles, \ n = \mathbf{\dfrac{P\cdot V}{R \cdot T}}[/tex]

Where for the hydrogen gas, H₂, we have;

P = 2.00 atm

V = 10.0 L

T = 298 K

The universal gas constant, R = 0.08205 L·atm·mol⁻¹·K⁻¹

Which gives;

[tex]n = \mathbf{ \dfrac{2.00 \times 10.0}{0.08205 \times 298}} \approx 0.82[/tex]

The number of moles of H₂ in the reaction, n ≈ 0.82 moles

Therefore;

1 mole of P₄(s) and 6 moles of H₂(g) produces 4 moles of PH₃(g)

Molar mass of P₄ ≈ 123.9 g

Which gives;

Number of moles in 8.50 g of phosphorus = [tex]\frac{8.5}{123.9}[/tex] ≈ 0.069

0.069 moles of P₄ will react with 0.069 × 6 moles ≈ 0.41 moles of H₂ to produce 0.069 × 4 moles ≈ 0.28 moles of PH₃

Second part:

The total number of moles of gas present at the conclusion of the reaction is therefore;

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Answer:

C. 96,657 Pa, 966 millibar, 725 Torr

Explanation:

The pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.

Pressure is defined as the force that is applied perpendicularly to an object's surface in relation to the area that it is dispersed over. Pressure can actually be a very good thing. Stress only occurs and has a fully negative impact when it continues to grow and that sensation of serenity and order is replaced with one of being out of control.

Given pressure = 725 mmHg

1 mmHg = 133.32 Pa

725 mmHg = 133.32 x 725 Pa

                  = 96,657 Pa

1 mmHg = 1.333 millibar

725 mmHg = 725 x 1.333 millibar

                   = 966 millibar

1 mmHg = 1 torr

725 mmHg = 725 Torr

Thus, the pressure of 725 mmHg in Pa, millibars, and Torr is 96,657 Pa, 966 millibar, 725 Torr. Hence option C is correct.

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The balance chemical equation is 2LiOH + CO2 → Li2CO3 + H2O. Therefore, option A is correct.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

The law of conservation of mass states that when a chemical reaction takes place, the mass of the reactants and products should be equal. As a result, during the chemical process, the number of atoms in each element remains constant. The chemical equation must be balanced as a result.

The chemical equation is said to be balanced if there are no inequalities. Every element in this illustration now has the same amount of atoms on the reactant and product sides.

Thus, option A is correct.

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Answer:

ans is 1 to 4 , 2 to 2, 3to 5, 4to 1, 5to 3

this is ans

Answer:

man my brain like that to

Explanation:

Answer:

man my brain like that to

Explanation:

Answer: Subscripts

Explanation: Those are the little numbers next to each atom in a chemical formula.

Answer:

C

Explanation:

We know that the molar mass of KOH is 56 gmol-1

Molar mass of Mg(OH)2 is 58.31 g/mol

Now; the balanced reaction equation is; MgCl2 + 2KOH → Mg(OH)2 + 2KCI

Hence;

2 moles of KOH yields 1 mole of Mg(OH)2

4 moles of KOH yields;

4 moles of KOH/1 mol * 1   mole Mg(OH)2 /2 moles KOH * 58.31 g Mg(OH)2 / 1 mole Mg(OH)2

So option c is correct

Answer:

4mol MG(OH)2/1 * 2mol KOH/1 mol MG(OH2) * 56.10g KOH/1 mol KOH

Explanation:

Took the test

The question is incomplete, the complete question is:

At a certain temperature, the equilibrium constant [tex]K_{eq}[/tex] for the following reaction is 0.74:

[tex]NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)[/tex]

Suppose a 49.0 L reaction vessel is filled with 1.5 mol of [tex]NO_3[/tex] and 1.5 mol of NO. What can you say about the composition of the mixture in the vessel at equilibrium?  

A. There will be very little [tex]NO_3[/tex] and NO.

B. There will be very little [tex]NO_2[/tex]

C. Neither of the above is true.

Answer: The correct option is B. there will be very little [tex]NO_2[/tex]

Explanation:

We are given:

Initial moles of [tex]NO_3[/tex] = 1.5 moles

Initial moles of NO = 1.5 moles

Volume of vessel = 49 L

As, moles of reactants and moles of products are equal, the volume term will not appear in the equilibrium constant expression.

Equilibrium constant for the reaction = 0.74

For the given chemical equation:

                                  [tex]NO_3(g)+NO(g)\rightleftharpoons 2NO_2(g)[/tex]

Initial:                            1.5           1.5             -

At eqllm:                     1.5-x        1.5-x            2x

The expression of equilibrium constant for the above reaction:

[tex]K_{eq}=\frac{[NO_2]^2}{[NO_3]\times [NO]}[/tex]

Putting values in above equation, we get:

[tex]0.74=\frac{(2x)^2}{(1.5-x)(1.5-x)}\\\\x=-1.13, 0.451[/tex]

Neglecting the negative value of equilibrium constant because concentration cannot be negative

Equilibrium concentration of [tex]NO_3[/tex] = (1.5 - x) = (1.5 - 0.451) = 1.049 moles

Equilibrium concentration of NO = (1.5 - x) = (1.5 - 0.451) = 1.049 moles

Equilibrium concentration of [tex]NO_2[/tex] = 2x = [tex](2\times 0.451)=0.902mol[/tex]

There are 3 possibilities:

Here, the value of [tex]K_{eq}=0.74[/tex], which is less than 1, therefore the reaction is reactant favored and we can say that there will be very little [tex]NO_2[/tex].

Hence, the correct option is B. there will be very little [tex]NO_2[/tex]

Answer:

so that people would be able to witness the inauguration of a president, since a president is an important part of a country.

Explanation:

Answer:

im not myself with nitro gone

Explanation:

Answer:

B) Synthesis reaction

Explanation:

synthesis reactions because they take apart larger molecules or compounds

Hope that helps

Answer:

(NH₄)₂SO₄(s) --->  2NH₄⁺(aq) + SO₄⁻²(aq)

Explanation:

The compound ammonium phosphate is a strong electrolyte. - This means that ammonium phosphate fully ionizes - dissociates to positive and negative ions completely.

The ions formed when ammonium phosphate dissociates are; Ammonium ion NH₄⁺ and sulphate ion SO₄⁻²

The transformation is given in the equation;

(NH₄)₂SO₄ --->  NH₄⁺ + SO₄⁻²

Upon balancing;

(NH₄)₂SO₄(s) --->  2NH₄⁺(aq) + SO₄⁻²(aq)

Answer:

True

Explanation:

Answer:

The First Battle of Panipat was fought between the invading forces of Babur and the Lodi Empire, which took place on 21 April 1526 in North India. It marked the beginning of the Mughal Empire. This was one of the earliest battles involving gunpowderfirearms and field artillery.

For you to write an essay on  Panipat first bring into view

Then write a brief story using this format.

In writing this essay, you must consider the structure and content of the essay or short note

For structure kick off with

In conclusion, for the content of the short note you can consider this,

Panipat fought its first battle on 21 April 1526 in the North of India, This battle was fought between the invading powers of Babur and the Lodi Empire.

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The conjugate acid : H₂CO₃

Given

Reaction

HCO₃− + H₂S → H₂CO₃ + HS−

Required

The conjugate acid

Solution

Bronsted-Lowry

Acid ⇒ H⁺ + conjugate base

Bases + H⁺⇒ conjugate acids

Acid and conjugate base : H₂S and HS−

Base and conjugate acid : HCO₃− and H₂CO₃

H₂S gives (H⁺), then the remaining acid is a conjugate base  HS−

HCO₃− receives (H +), then the conjugate acid H₂CO₃

Answer:

The correct answer is D.

Explanation:

Edge'21

Answer:

Decomposition

Explanation:

hope it helps you

Answer:

Grass

Oak tree

Explanation:

Bear and human are definitely not and fungus are decomposers.

Answer:  The precipitate formed is [tex]BaSO_4[/tex]

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid or precipitated form are represented by (s) after their chemical formulas.  

A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.  

The balanced chemical equation is:

[tex]K_2SO_4(aq)+BaCl_2(aq)\rightarrow BaSO_4(s)+2KCl(aq)[/tex]

Answer:

None of the above

but it must be:

for Copper(I)chloride

3CuCl + Al ==> AlCl3 + 3Cu

for Copper (II) chloride

3CuCl2 + 2Al ==> 2AlCl3 + 3Cu

Answer:

They are all mixture

Explanation:

last option