How much do 3.01 x 1023 atoms of Helium weigh?

Answers

Answer 1

Answer:

4.0 grams

Explanation:

I hope that helped!!


Related Questions

how many atoms of carbon atoms are in the reactant

Answers

Answer:

8

Explanation:

There are 8 carbon atoms in the reactants' side, because you multiply the 2 in front of C4H10 and the 4 under the C atom, and that gives you 8. So, 8 carbon atoms.

What best describes the transition from gas to liquid

Answers

It's condensation in which gas particles have a higher kinetic energy..

1. Calculate the density of an object that is has a mass of 24 grams and a volume of 6 cm cubed

Answers

Answer:

4g/cm cubed

Explanation:

density=mass/volume

d=24/6

d=4

How many particles are in 3.5 g of P

Answers

Explanation:

Hence an atom is made up of three particles called electrons, protons and neutrons and 1 mol exactly contains 6.02214076×1023 atoms or particles. Thus 2.11×1024 atoms are present in 3.5 mol of arsenic.


A cars is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy for the car? (Formula:KE= 1/2 MV2) 36,300J 43,200J 72,600J 86,400J

Answers

Explanation:

ano po topic nyo para maayos sagut

43200J
First make sure everything has the correct unit, in this case the unit all are S.I Units. Then, just compute the data into the Kinetic Energy formula. Its direct.

How is melting simillar evaporation

Answers

Answer:

Melting and evaporation both represent changes in matter that involve behavior at the molecular level.

Answer:

well both disappear over time

Explanation:

When the volume of a closed container containing hydrogen gas is increased by a factor of two, how will this affect the number of hydrogen atoms in the container

Answers

We have that for the Question "When the volume of a closed container containing hydrogen gas is increased by a factor of two, how will this affect the number of hydrogen atoms in the container"

Answer:

Number of hydrogen atoms depend only on amount of gas which remains constant. Hence, increasing the volume of container has no affect on number of hydrogen atoms.

Explanation:

The number of hydrogen atoms will remain the same in the container. Because the container is closed and amount of hydrogen gas remains constant, which means that no extra amount of hydrogen gas is removed or added from the container when volume increases.

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THE POINT (-7,4) IS REFLECTED OVER THE LINE X=-3. THEN, THE RESULTING POINT IS REFLECTED OVER THE LINE Y=X. WHERE IS THE POINT LOCATED AFTER BOTH REFLECTIONS?

Answers

Answer: 4,2

The graph should show how to do it.

What is happening when scientists use their five senses to learn new
information?
A. Drawing a conclusion
B. Forming a hypothesis
C. Making observations
C
D. Making predictions
VIOUS

Answers

D. Making predictions

Answer:

A, drawing a conclusion

Explanation:

A solution of HF is titraited with a 0.150M NaOH solution. The pH at the half equivalence point is ? The Ka of HF I 0.00068.

Answers

Answer:

don't know00000⁰0000000

The specific heat of a certain type of cooking oil is 1.75J(g. °C). How much heat energy is needed to raise the temperature of 2.44 kg of this oil from 23. °C to 191 °C?

Answers

Answer:

The amount of heat needed is 593.88 kJ.

If 20.3 g of NO and 13.8 g of O₂ are used to form NO₂, how many moles of excess reactant will be left over?
2 NO (g) + O₂ (g) → 2 NO₂ (g)

Answers

Answer:

0.02 moles of O₂ will be leftover.

Explanation:

Anwser is wasssssssup

N2(g) + 3H2(g) ⟶ 2NH3(g)

The equation above is the equation for the Haber process.

If 2.0 moles of nitrogen are available for a reaction, what amount of hydrogen represents the correct stoichiometric ratio?

Answers

6.0 mols is the answer

What is the concentration of H+ in a 2.5 M HCl solution?

Answers

Answer:

The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M

Explanation:

As HCl is a strong acid and hence a strong electrolyte, it will dissociate as

HCl ⟶ H⁺ + Cl⁻

So, The concentration of H⁺ will be 2.5 M (same as HCl)

Thus, The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M

-TheUnknownScientist 72

Where’s the choices

Giving brainly for correct answer! :)

Answers

Answer:  I think its in order, not really sure. First answer on top. Next answer on the left and the Last answer on the right.

Each element can be indentified by the number of _______ found in its nucleus, which also equals the elements _______ _______.

Answers

Answer:

Protons, Atomic number

protons, atomic number

0.500 mol aluminium hydroxide, Al(OH)3 reacts with 0.500 mol sulphuric acid, H2SO4 to produce aluminium sulphate and water.
a) Write the balanced equation for the reaction.

b) Which reactant is limiting reactant?

c) How many moles of excess reactant is used in the experiment?

d)Determine how many moles of aluminium sulphates was obtained if the percentage yield of aluminium sulphate during the experiment is 77%.

[9 marks]​

Answers

a) The balanced equation for the reaction would be as follows:

[tex]2 Al(OH)_3 + 3 H_2SO_4 ---> Al_2(SO_4)_3 + 6 H_2O[/tex]

b) The mole ratio of aluminum hydroxide to sulfuric acid is 2:3. This means that every 1 mole of the aluminum hydroxide would require 1.5 moles of sulfuric acid.

0.5 mole aluminum hydroxide would require:

         0.5 x 3/2 = 0.75 moles of sulfuric acid.

But only 0.500 moles of sulfuric acid is present. Thus, the limiting reagent is sulfuric acid.

c) With 0.5 moles sulfuric acid, the mole of aluminum hydroxide required would be:

             0.5 x 2/3 = 0.33

Excess moles of aluminum hydroxide = 0.5 - 0.33

                                                              = 0.17 moles

d) The mole ratio of sulfuric acid to aluminum sulfate produced is 3:1. With 0.5 moles sulfuric acid, the mole of aluminum sulfate produced would be:

        0.5 x 1/3 = 0.17 moles

But the percentage yield is 77%

   77/100 x 0.17 = 0.13 moles

Thus, the moles of aluminum sulfate that would be obtained with a percentage yield of 77% would be 0.13 moles.

More on stoichiometric calculations can be found here: https://brainly.com/question/8062886

how many chemical bonds are formed in CH4 molecule​

Answers

Answer:

4 covalent bonds

I need help wit this

Answers

#1

[tex]\\ \sf\longmapsto2 Ca+O_2\longrightarrow 2CaO[/tex]

Balanced

#2

[tex]\\ \sf\longmapsto N_2+3H_2\longrightarrow 2NH_3[/tex]

Balanced

#3

[tex]\\ \sf\longmapsto 2Cu_2O+C\longrightarrow 4Cu+CO_2[/tex]

Balanced

#4

[tex]\\ \sf\longmapsto H_2O_2\longrightarrow H_2O+O_2[/tex]

Already balanced

if n=3, what are the quantam numbers l and m​

Answers

Answer:

1=n yan ang alam heheheheh sorry kong mali

Can all alkyl halides react with water to give alcohols?​

Answers

Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.

Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.

In these reactions the function of the acid is to produce a protonated alcohol. The halide ion then displaces a molecule of water (a good leaving group) from carbon; this produces an alkyl halide:

Again, acid is required. Although halide ions (particularly iodide and bromide ions) are strong nucleophiles, they are not strong enough to carry out substitution reactions with alcohols themselves. Direct displacement of the hydroxyl group does not occur because the leaving group would have to be a strongly basic hydroxide ion:

We can see now why the reactions of alcohols with hydrogen halides are acid-promoted.

Carbocation rearrangements are extremely common in organic chemistry reactions are are defined as the movement of a carbocation from an unstable state to a more stable state through the use of various structural reorganizational "shifts" within the molecule. Once the carbocation has shifted over to a different carbon, we can say that there is a structural isomer of the initial molecule. However, this phenomenon is not as simple as it sounds.

- BRAINLIEST answerer

Which candle burned the longest time why

Answers

Answer:

The one that burned longer because it burned longer

Explanation:

Poured beeswax candles will burn the longest
Why: slowest due to the hardness of the wax and the high temperature needed to melt the wax

Which is not an example of vaporization?

Answers

Answer:

boi i need the choices idiot

Explanation:

Nobody can add an answer without context.

But if this helps,

"Vaporization of an element or compound is a phase transition from the liquid phase to vapour. There are two types of vaporization: evaporation and boiling. Evaporation is a surface phenomenon, whereas boiling is a bulk phenomenon." - Wikipedia

https://en.wikipedia.org/wiki/Vaporization

PLEASE HELP ASAPPPPPP

Answers

Answer:

accelerating upward would be your answer

A student would like to determine how heating a liquid changes its volume. The student hypothesizes that the liquid will increase in volume. The following list shows the steps taken by the student in order to test the hypothesis.
1.Select the liquid to test.
2.Place the liquid in a sealed container.
3.Use a Bunsen burner to heat the liquid by 10°C.
4.Measure the volume of the liquid.
5.Record the results.
What is wrong with how the student conducted the investigation?
A.
The hypothesis was not valid because it is impossible for liquids to change in volume.
B.
The volume of the liquid should be measured before it is heated.
C.
The student should have increased the temperature of the liquid by more than 10ºC.
D.
The length of time it took for the liquid to be heated should be measured.

Answers

Answer:

The volume of the liquid should be measured before it is heated.  

Explanation:

Because During an experiment to test how a variable changes a substance, it is important to first observe and record the characteristics of the substance before the variable is introduced. In this case, the variable is heat energy.  

Which of the following examples from the story "The Dentist" uses direct characterization to tell you how Lemon
felt about dentists?

Answers

Answer: the second answer makes the most sense

Explanation:

Curt Lemon was tensing the weighters there. So he was playing fidgets and  dogs. Lemon  make the character mentally fearing and thus option B is correct.

What is the story dentist?

This is a terrifying tale involving a man who is going to the dentist. He is dreadfully afraid of visiting the dentist because of the pain it would cause. Then, for him, things significantly worsen..

He notes that because he didn't know Curt Lemon well, mourning for him was challenging, but to avoid sounding sappy, he shares a quick Curt Lemon story.

The men are working in an operational region near the South China Sea in February. An Army dentist is flown in one day to examine the men's teeth. Curt Lemon is anxious as the platoon waits to be checked one by one.

Finally, he acknowledges that when in high school, he had some negative dental experiences. He claims that nobody should interfere with his teeth, and when he is called, he will decline to enter.

However, when the dentist summons him a little while later, Lemon gets up and enters the tent.Thus option B is correct.

To find more about the story Dentist, refer the link below:

https://brainly.com/question/11991206

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Um Is it in third period and has three electrons in its highest P orbitals

Answers

Answer:

Shut yo musty dusty ah up zaddy

Explanation:

come here big mami

Chemistry help!
How much 1.50 M H3PO4, in mL, would you need to add to 50.00 mL of 3.50 M Ca(OH)2 in order to neutralize the solution?

_____ of mL of H3PO4

Answers

Answer:

Use the formula below

Explanation:

use the moles ratio for this by writing down the reaction and balancing the equation

A student rides a bicycle 100 meters in 25 seconds. What is the students speed?

Answers

Answer:

The student's speed is 4 m/s.

Explanation:

Speed = Distance/Time

Speed = 100m/25s

Speed = 4 m/s

Which of the following statements about mass is true? (1 point)


A. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be converted to weight.


B. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be less.


C. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will still be 2,500 kg.


D. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will be more.

Answers

Answer:

a because mass is converted into weight

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