HELPPP 50 POINTS

How are the things people are
doing helpful to them and harmful to them?

Answers

Answer 1
i don't understand your question?

Related Questions

I para realizar un receta casera de bizcocho se necesitan 100 gramos de azúcar, calcula los moles a los que equivale y el número de moléculas de sacarosa.

Answers

The complete question is as follows: I want to make a homemade cake recipe you need 100 grams of sugar, calculate the moles to which it is equivalent and the number of molecules of sucrose.

Answer: In 100 grams of sugar there are 0.292 moles and the number of molecules of sucrose are [tex]1.76 \times 10^{23}[/tex].

Explanation:

Given: Mass = 100 g

Molar mass of sugar = 342.3 g/mol

As number of moles is the mass of substance divided by its molar mass.

Hence, moles of sucrose are calculated as follows.

[tex]Moles = \frac{mass}{molar mass}\\= \frac{100 g}{342.3 g/mol}\\= 0.292 mol[/tex]

According to mole concept, 1 mole of every substance contains [tex]6.022 \times 10^{23}[/tex] molecules.

Hence, the number of molecules present in 0.292 mol are calculated as follows.

[tex]0.292 mol \times 6.022 \times 10^{23}\\= 1.76 \times 10^{23}[/tex]

Thus, we can conclude that in 100 grams of sugar there are 0.292 moles and the number of molecules of sucrose are [tex]1.76 \times 10^{23}[/tex].

In a nonpolar covalent bond, electrons are
a. Located in a mobile "sea" shared by many ions
b. Transferred from one atom to another
c. Shared equally between two atoms
d. Shared UNequally between two atoms

Answers

Answer: c. Shared equally between two atoms

Electrons are shared equally because the atoms have the same electronegativity.

How would it have been if particles of matter had no space?

Answers

Answer:

Matter is made of small particles of atoms or molecules. ... The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.

How many total atoms are there in 60.3 g of carbon monoxide (CO)?
total atoms:
atoms

Answers

Explanation:

moles = mass/mr

=60.3/28

=2.15 moles

number of particles = moles × 6.02×10^23

= 2.15×6.02×10^23

= 1.29×10^24 atoms

CO=12+16=28

.A volumetric pipette is used to measure 25.0cm3 of 2.0mol/dm3 aqueous sodium hydroxide into aconical flask.A burette is filled with dilute sulfuric acid. Write a balanced symbol equation for the reaction between these chemicals when we neutralise.

Answers

Answer:

A volumetric pipette is used to measure 25.0cm3 of 2.0mol/dm3 aqueous sodium hydroxide into aconical flask.

A burette is filled with dilute sulfuric acid.

Write a balanced symbol equation for the reaction between these chemicals when we neutralise.

Explanation:

The reactants of the given reaction are:

sodium hydroxide and dilute sulfuric acid.

The balanced chemical equation of the reaction is:

[tex]H_{2}SO_{4} (aq) + 2NaOH(aq) -> Na_{2} SO_{4} (aq)+ 2H_{2} O(l)[/tex]

Acid and base raect with each other and form salt and water.

This reaction is called a neutralization reaction.

What is the empirical formula of a compound containing 5.03 g carbon, 0.42 g hydrogen, and 44.5 g of chlorine

Answers

Answer:

CHCl₃

Explanation:

We have the following data:

C = 5.03 g

H = 0.42 g

Cl= 44.5 g

First, we divide each mass by the molar mass (MM) of the chemical element to calculate the moles:

MM(C) = 12 g/mol

moles of C = mass/MM(C) = 5.03 g/(12 g/mol) = 0.42 mol C

MM(H) = 1 g/mol

moles of H = mass/MM(H) = 0.42 g/(1 g/mol) = 0.42 mol H

MM(Cl) = 35.4 g/mol

moles of Cl = mass/MM(Cl) = 44.5 g/(35.4 g/mol) = 1.26 mol Cl

Now, we divide the moles by the smallest number of moles (0.42):

0.42 mol C/0.42 = 1 C

0.42 mol H/0.42 = 1 H

1.26 mol Cl/0.42 = 3 Cl

Thus, the C:H:Cl ratio is 1:1:3.

Therefore, the empirical formula is CHCl₃

Answer:

CHCl₃

Explanation:

PLEASEEEE HELPPPP!!!

What is a spontaneous change?

A. One that has an ordered arrangement of particles.
B. One that occurs on its own.
C. One that has a random arrangement of particles.
D. One that occurs when one specific event happens.

Answers

Answer:

B.

Explanation:

A spotaneous change is one which occurs on its own

A spontaneous change is one that occurs on its own.

What is a Spontaneous Process ?

A spontaneous process is a process which has a natural tendency to occur in one direction , It has no relation with the speed , It can be fast or it can be slow but it doesn't require any external factors to happen.

such reactions might not face change in energy but it will see change in the way the matter or energy is distributed

The example of a spontaneous reaction is the decay of radioactive elements.

Example of Spontaneous Process is also water flowing downhill, it has the natural tendency to flow in that direction.

A spontaneous change is one that occurs on its own.

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list three common examples of solute​

Answers

Answer:

sugar, salt, oxygen

Explanation:

hope these work

Answer:

Examples of solutes include sugar, salt, oxygen, etc. There are numerous examples of solutions. For example, milk (solvent) and sugar (solute) make sweet milk. Air is made up of gases (oxygen, nitrogen, carbon dioxide, etc.).

Explanation:

Calcule el peso de cromato sodico, Na2CrO4, necesario para preparar 200g de una disolución al 20% de Na2CrO4

Answers

Answer:

40g de cromato sódico serán necesarios

Explanation:

Una solución 20% de Na2CrO4 contiene 20g de Na2CrO4 por cada 100g de solución (Esto es, soluto + solvente). Para preparar 200g de la disolución en mención serán necesarios:

200g solucion * (20g Na2CrO4 / 100g Solución) =

40g de cromato sódico serán necesarios

PLEASE HELP !!!

Which of the following measurements is used to measure the enthalpy of combustion?

A. Measuring the change in temperature when two liquids are mixed.
B. None of these
C. Measuring the change in temperature of a beaker of water.
D. It cannot be measured, only calculated using the equation: q = mc∆T.

Answers

Explanation:

measuring the change of temperature when 2 liquids are mixed

ANSWER THE QUESTION TO GET BRAINLIST

When sunlight travels from the vacuum of space into Earth's atmosphere it slowed down slightly. Explain why and name the light principle involved.

Answers

It is thought that global dimming is probably due to the increased presence of aerosol particles in Earth's atmosphere, caused by pollution, dust, or volcanic eruptions. Aerosols and other particulates absorb solar energy and reflect sunlight back into space. ... Water droplets in clouds coalesce around the particles.

Global Dimming

source:

wikipedia via gooogle snippet

What element has 16 electrons, 16 protons, and 16 neutrons

Answers

Answer:

The element that has 16 electrons, 16 protons, and 16 neutrons is sulfur (S)

Explanation:

The atomic number tell you the number of protons.

The atomic configuration tell you the number of electrons.

The mass number minus the protons tell you the number of neutrons.

Is soup pure or impure?

Answers

Answer:

I think it's impure . Hope this helps you

Answer:

I think is pure but not 100% pure.

What is the pH of a solution with [H+] concentration of 1.86 x 10-5?
a.5.37 x 10-10
b.9.3
c.4.7
d.1.86 x 10-5

Answers

Answer:

4.7

Explanation:

The pH of a solution can be found by using the formula

[tex]pH = - log [ {H}^{+} ][/tex]

From the question we have

[tex]ph = - log(1.8 \times {10}^{ - 5} ) \\ = 4.7447[/tex]

We have the final answer as

4.7

Hope this helps you

Write a nuclear equation for the beta decay of Promethium-165

Answers

Answer:

see your answer in pic

Explanation:

There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the nuclear equation for the beta decay of Promethium-165 is

¹⁶⁵Pm[tex]\rightarrow[/tex]⁰e₋₁  +  ₆₂Sm¹⁶⁵

What is nuclear decay?

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle. The kinetics that is related to nuclear decay is of first order.

The nuclear equation for the beta decay of Promethium-165 is

¹⁶⁵Pm[tex]\rightarrow[/tex]⁰e₋₁  +  ₆₂Sm¹⁶⁵

Beta decay of  Promethium-165 is the emission of electron particle from the given isotope. the product is Samarium  ₆₂Sm¹⁶⁵.

Therefore, the nuclear equation for the beta decay of Promethium-165 is

¹⁶⁵Pm[tex]\rightarrow[/tex]⁰e₋₁  +  ₆₂Sm¹⁶⁵

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Rank them from the smallest to the largest

Answers

electrons

protons

atom

compounds

mixtures

PLEASE HELP : Arrange the following elements into a food chain: plants, snake, Sun, hawk, and mouse.

Answers

Answer:

Plants ➯ Mouse ➯ Snake ➯ Hawk ➯ Sun

Explanation:

In Order As A Food Chain

The elements are arranged into food chain like plants ⇒Mouse ⇒ Snake⇒ Hawk ⇒ Sun.

What is element?

A substance that could not be further decomposed according to any chemical reaction is known as a chemical element.

What is food chain?

The flow of nutrients as well as energy through such an ecosystem is described by a food chain. Energy is first produced by plants at the most fundamental level, and then it is used by higher-level species like herbivores. Energy is then transmitted from one carnivore to the next when they eat the herbivores.

The elements are arranged into food chain like plants ⇒Mouse ⇒ Snake⇒ Hawk ⇒ Sun.

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How many grams of FeCl3 are needed to make 1.5 L of a solution with a molarity of 0.450 M?

Answers

Moles=concentration x volume. 1.5/1000 multiply 0.450 = 6.75x10^-4
To find the mass of fecl3, we have the formula, mass=moles x molar mass. 6.75x10^-4 x (55.8+35.5 x 3). = 0.1096g

Not sure tho if i did it right

ANSWER FAST
What is the relationship between Ka and Kb with Kw?

(a) The sum of Ka and Kb equals the auto-dissociation constant for water.
(b) The product of Ka and Kb equals the auto-dissociation constant for water.
(c) The quotient of Ka and Kb equals the auto-dissociation constant for water.
(d)The difference of Ka and Kb equals the auto-dissociation constant for water.

Answers

The sum of Ka and Kb equals the auto-dissociation constant for water. The product of Ka and Kb equals the auto-dissociation constant for water.
I’m pretty sure it’s c

_______ reach the surface first during an earthquake.


Rayleigh waves


P waves


Love waves


S waves

Answers

Answer:p waves hope that helps

PLEASE HELP!!!!!!
The average number of drops of NaHCO3 in the titration lab was 142. Calculate the number of moles of NaCHO3 that were required to neutralize the CH3COOH in the vinegar.
- 1 mole of acetic acid was required for 2 moles of sodium bicarbonate
- 1 mole of acetic acid was required for 1 mole of sodium bicarbonate
- 2 mole of acetic acid was required for 1 mole of sodium bicarbonate
- 1 mole of acetic acid was required for 3 mole of sodium bicarbonate

Answers

Answer: The correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

Explanation:

We are given:

Average number of drops of sodium bicarbonate = 142

The chemical equation for the reaction of sodium bicarbonate and acetic acid in vinegar follows:

[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2CO_3[/tex]

From the stoichiometry of the reaction:

1 mole of sodium carbonate reacts with 1 mole of acetic acid in vinegar.

Hence, the correct option is 1 mole of acetic acid was required for 2 moles of sodium bicarbonate

if you have 5.42 x 1024 aluminum atoms, approximately how many moles is that​

Answers

Answer:

It is approximately 9 moles

Explanation:

Divide the aluminum atoms by Avogadro's number

(5.42*10^24)/(6.02*10^23)

= approx. 9 moles

how many moles are in 3.25188x10^24 molecules of CO2

Answers

Answer:  C is right

Explanation:  One mole is 6.022 x 10^23 molecules.

Dividing 3.25188 x 10^24 / 6.022 x 10^23 = 5.4 moles

URGENT !!!

Which of the following pairs lists a substance that can neutralize Ca(OH)2 and the salt that would be produced from the reaction? (3 points)
HCl and CaCl2
HClO and CaHClO
H2O and Ca(OH)3
H3PO4 and Ca(PO3)2

Answers

HCl and CaCl2

I took the test and it wright

The correct pair that lists a substance that can neutralize [tex]\rm Ca(OH)_2[/tex] and the salt that would be produced from the reaction is HCl and [tex]\rm CaCl_2[/tex].

A reaction is a process that involves the transformation of one or more substances into one or more different substances.

When HCl (hydrochloric acid) reacts with [tex]\rm Ca(OH)_2[/tex] (calcium hydroxide), they undergo a neutralization reaction. The HCl donates a hydrogen ion ([tex]\rm H^+[/tex]) to the  [tex]\rm Ca(OH)_2[/tex], resulting in the formation of water ([tex]\rm H_2O[/tex]) and [tex]\rm CaCl_2[/tex] (calcium chloride).

The reaction can be represented as follows:

[tex]\rm 2HCl + Ca(OH)_2\rightarrow 2H_2O + CaCl_2[/tex]

Therefore, HCl is an acid that can neutralize [tex]\rm Ca(OH)_2[/tex] and the salt produced from this reaction is  [tex]\rm CaCl_2[/tex].

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Which of these is an example of a prosthesis?
A. A hearing aid
B. A textbook
C. Gloves
D. A pair of boots

Answers

Answer:

hearing aid

Explanation:

an artificial body part

A hearing aid is an example of a prosthesis. Therefore, option A is correct.

A prosthesis is an artificial device or replacement for a missing body part or function. In the case of a hearing aid, it is a device designed to assist people with hearing loss by amplifying sound. It acts as a substitute for the natural function of the ear.

A textbook is a written educational resource, gloves are protective coverings for the hands, and a pair of boots is footwear. These items do not serve as artificial replacements for missing body parts or functions.

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2.7 x 10^25 molecules of MnO equals how many moles?

Answers

Answer:

27 and 24 zeroes following it

Explanation:

10^25 is 100...(continues for 25 zeroes)

Now we multiply it by 2.7, making it 24 zeroes afterwards.

Avogadro's numbers are used to calculate the number of moles from molecules. There are 44.8 moles in MnO.

What are molecules?

Molecules are the unit of the compound that may have the same or different atoms in it. The number of molecules is used to calculate moles from Avogadro's number.

By Avogadros number 1 mole of substance = 6.02 x 10²³ molecules

So, 2.7 x 10²⁵ molecules will have moles:

(2.7 x 10²⁵ molecules × 1 mole) ÷ (6.02 x 10²³ molecules) = 0.448 × 10² moles

Therefore, there are 44.8 moles of MnO.

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Which of the following emits a beta particle?
alpha particle
nucleus
hydrogen atoms
photoelectrons

Answers

It’s photoelectrons

Explain how to convert a mass of compound A to a mass of compound D in words using the following reaction:

2A + 4B = C + 3D

You don't have to just give me the answer but if you can help me understand id appreciate it greatly

Answers

Answer:

1. Convert the mass of A to moles dividing in molar mass

2. Convert the moles of A to moles of D (2mol A = 3mol D)

3. Convert the moles of D to mass multiplying by its molar mass

Explanation:

As you can see in the equation, 2moles of A produce 3 moles of D, the equation is:

2mol A = 3mol D

But in the problem you are having the mass of A and you need the mass of D. That means you require to convert the mass of A to moles. With the moles of A you can find the moles of D and, as last, you need to convert the moles of A to mass.

To convert mass to moles or vice versa you must use Molar Mass. That means, the answer is:

1. Convert the mass of A to moles dividing in molar mass2. Convert the moles of A to moles of D (2mol A = 3mol D)3. Convert the moles of D to mass multiplying by its molar mass

How many moles of aluminum oxide are produced when 6 moles of oxygen gas react?
4Al + 3O2 → 2Al2O3

Answers

Answer:

4 moles of aluminum and 6 moles of oxygen are produced

When the pH of a solution is changed from 4 to 3, the hydronium ion concentration of the
solution
A)
increases by a factor of 10
B)
decreases by a factor of 100
C)
increases by a factor of 100
D)
decreases by a factor of 10

Answers

Answer:increases by a factor of 10

Explanation: the concentration of the solution changed from 4 to 3

Other Questions
Read this question:"If representation in Congress is to be determined by the number of people who live in each state, should slaves be counted?"At the Constitutional Convention, how would someone from a Southern state most likely respond? (1 point)Select one:a. Yes, they live in our state, and they should be counted.b. Yes, they are equal to white people and should be counted.c. No, slaves were not born in the states and should not be counted.d. No, slaves are not equal to white people and should not be counted. Which two substances are among the four major types of organic compounds made by living things?A:CarbohydratesB:Potassium C:WaterD:Proteins Determine whether each of the following goods is a private good, a public good, a common resource, or a club good. Private Good Public Good Common Resource Club Good A stationary bike in a fitness room that is open to the public A large, beautiful clock in a town square A new drum set for you to play in your friend's band Loops spaced further apart create a stronger electromagnet. True or False What is the solution to the equation?^5 / x+7= -2 (A.) -39 (B.) -17 (C.) 25 (D.) no solution can someone help please?? What is the difference between the views of Caesar held by Cassius and Brutus? a. Cassius wants Caesar out of power. Brutus loves Caesar but knows he has flaws; he considers his countrymen as he makes his decision. b. Cassius wants Caesar to stay in power. Brutus wants to help Cassius become the new leader. c. Cassius wants Caesar out of power. Brutus agrees with Cassius, but thinks Cassius would not be a good leader either. d. Cassius thinks Caesar should share his power with Cassius and Brutus. Brutus thinks the power should be divided equally among all of the countrymen. DUE TODAY!!! PLS HELP IF YOUR SURE OF THE ANSWERS !!! 45 POINTS PLZ HELP !!! Solve for X A) 6B) 5C) 4D) 7 Ms.Peralta's friend Mike is a construction worker. Mike gets paid $15 an hour. After working 9 hours he gets paid 1.25 times his hourly rate. Below you can find Mike's hours for last Friday. - Mike worked for 5 hours - took an 1 hr and 15 minute break for lunch (does not count toward his work hours) - worked for an additional 7.5 hours How much money did Mike make last Friday? Please answer step by step can someone please help me with this. thank u ............................................... Which tab is used to create a new e-mail?O FileO ViewO FolderO HomePlease help!!!!!!!!!!!!! Read the sentence.The harsh wind scoured the scant remaining leaves from the trees, and a desolate landscape remained in its wake.The underlined portion of the sentence is A.) a coordinating conjunction. B.) a dependent clause. C.)an independent clause. D.)a subordinating conjunction. 2. Categorization:Categorize the following 12 elements and characteristics as belonging to a metal, anon-metal, or a metalloid.1) Lithium (Li)5) Nitrogen (N)9) Boron(B)2) Conductive6) Dull10) Brittle3) Potassium (K) 4) Malleable7) Non-conductive 8) Shiny11) Silicon (Si) 12)Oxygen (0) Use the following definition to help you with the classification:Malleable: easily changed into a new shape by hammering or pressing without breaking or cracking..Dull: not shinyBrittle: easily damagedMetalMETALLOIDNON METAL The Heart of a small mammal is pierced by a spear of a hunter. Suggest ONE way in which this would lead to the death of the animal.Ill give brainly Evaluate b^2 c^-1 for b = 8 and c = -4.A. -16B. 1/16C. 16D. 256 At the playground, the new sandbox was 10 meters wide and had an area of 60 square meters. How long is the sandbox? Which of the following is a mechanism used to help ensure that federal judges are not punished for their decisions?A.The secret service provides security services to federal judges.B.Congress is not allowed to discuss court decisions publicly.C.Federal judges salaries are determined by local politicians.D.Federal judges have fixed salaries.