1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olasank [31]
3 years ago
11

4.Calculate the volume of 40g of Helium (He) at rtp.

Chemistry
1 answer:
Oksana_A [137]3 years ago
4 0

Answer:

2.24dm³

Explanation:

Given parameters:

Mass of He = 40g

Unknown:

Volume of Helium  = ?

Solution:

To solve this problem, we convert the given mass to number of moles.

   Number of moles  = \frac{mass}{molar mass}  

   molar mass of He  = 4g/mol

  Number of moles  = \frac{4}{40}   = 0.1mole

So;

                  1 mole of gas at rtp occupies a volume of 22.4dm³

                0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³

You might be interested in
Fossil fuels are made up of organisms that died millions of years ago. Which best describes this source of energy
Alenkinab [10]
Nonrenewable
hope this helps
5 0
3 years ago
Wet snow is best for snow man building<br>​
fredd [130]

Answer:

<h2>Hope my answer helps</h2>

Explanation:

<h2>Moist to wet snow is the ideal moisture content needed to build the best snowman. If the snow is too dry, it is comparable to loose powder and in turn, the snow won't stick together. On the other hand, if the snow has too much moisture and is slushy, it can't form into a solid.</h2>
4 0
2 years ago
Please help
aev [14]

Answer:

Copper(II) sulphate – sodium hydroxide reaction

The reaction between copper(Il) sulphate and sodium hydroxide solutions is a good place to start. If you slowly add one to the other while stirring, you will get a precipitate of copper(II) hydroxide, Cu(OH)2.

5 0
3 years ago
In the reaction BaCO3 + 2HNO3 + Ba(NO3)2 + CO2 + H2O, what mass of Ba(NO3)2 can be formed by combining 55 g BaCO3 and 26 g HNO3
Nataliya [291]

From the stoichiometry of the reaction, the mass of barium nitrate produced is 54.9 g.

<h3>Stoichiometry</h3>

The term stoichiometry refers to mass - volume relationships. Stoichiometry can be used to calculate the amount, mass or volume of reactants and products from the balanced reaction equation.

The equation of the reaction is written as follows;

BaCO3 + 2HNO3 ------>  Ba(NO3)2 + CO2 + H2O

Number of moles of BaCO3  = 55 g/197.34 g/mol = 0.28 moles

Number of moles of HNO3 = 26 g/63.01 g/mol = 0.41 moles

From the reaction equation;

1 mole of BaCO3 reacts with 2 moles of HNO3

0.28 moles of BaCO3 reacts with 0.28 moles ×  2 moles/1 mole = 0.56 moles

There is not enough HNO3 hence it is the limiting reactant.

Number of moles of Ba(NO3)2 produced  is obtained from;

2 moles of HNO3  yields 1 mole of Ba(NO3)2

0.41 moles of HNO3  yields 0.41 moles × 1 mole/2 moles

= 0.21 moles of Ba(NO3)2

Mass of  Ba(NO3)2  = 0.21 moles  × 261.337 g/mol = 54.9 g

Learn more about stoichiometry: brainly.com/question/9743981

8 0
2 years ago
(d)
Masteriza [31]

Explanation:

hope this helps you,

-s.

4 0
2 years ago
Other questions:
  • the absolute tempeature of a gas is increased four times while maintaining a constant volume. what happens to the pressure of th
    14·1 answer
  • An unknown solution turned red litmus paper red, turned blue litmus paper blue, and didn’t conduct electricity. The solution is
    8·2 answers
  • What is the name of the element that has electrons arranged <br>2,8,2 ​
    7·2 answers
  • If you were to describe the shape of the Milky Way, what term would you use? A. Irregular galaxy B. Elliptical galaxy C. Barred-
    12·1 answer
  • In your own words, describe how a hurricane forms. (5 points)
    10·1 answer
  • Which formula can be used to calculate the molar mass of ammonia
    13·1 answer
  • Match the following scientist with his experiment or contribution
    9·1 answer
  • StitchXpika plzzzzzzzzz
    15·1 answer
  • Aluminium is the most common metal in the Earth's crust.<br> Which is NOT a property of aluminium?
    6·1 answer
  • Compare the relative strength of the two forces B and C. Explain how you determined this comparison by identifying the forces.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!