All categories

3 years ago

When 11.12 g of neon is combined in a 100 L container at 80oC with 9.59 g of argon, what is the mole fraction of argon?

1 answer:

3 0

The correct answer for the question that is being presented above is this one: "0.3."

Here it is how to solve.
Molecular mass of Ar = 40
Molecular mass of Ne = 20
Number of moles of Ar = 9.59/40 = 0.239
Number of moles of Ne = 11.12/20= 0.556
Mole fraction of argon = 0.239/ ( 0.239 + 0.556) = 0.3

You might be interested in

What fraction of a sample of 6832ge, whose half-life is about 9 months, will remain after 2.9 yr ?

Viefleur [7K]

The half-life of 9 months is 0.75 years. 2.0 years is 2.0/0.75 = 2.67 half-lives. Each half-life represents a reduction in the amount remaining by a factor of two, so: A(t)/A(0) = 2^(-t/h) where A(t) = amount at time t h = half-life in some unit t = elapsed time in the same unit A(t)/A(0) = 2^(-2.67) = 0.157 15.7% of the original amount will remain after 2.0 years. This is pretty easy one to solve. I was happy doing it.

4 0

3 years ago

The purpose of an incline plane is to reduce which of the following?

MA_775_DIABLO [31]

The purpose of an inclined plane is to reduce force.

3 0

2 years ago

Read 2 more answers

A. 1.0 liter of a 1.0 M mercury (II) chloride (HgCl2) solution IMO)

insens350 [35]

What mass of the following chemicals is needed to make the solutions indicated?

Answer:

271.6g

Explanation:

The mass of the chemicals need to make the needed solution can be derived by obtaining the number of moles first.

Given parameters:

Volume of solution = 1L

Molarity of HgCl₂ = 1M

number of moles of HgCl₂ = molarity of solution x volume

= 1 x 1

= 1 mole

From;

Mass of a substance = number of moles x molar mass;

we can find mass;

Molar mass of HgCl₂ = 200.6 + 2(35.5) = 271.6g/mol

Mass of the substance = 1 x 271.6 = 271.6g

4 0

3 years ago

What neutral atom is represented by the following configuration: 1s2,2s2,2p6,3s2,3p6,4s2,3d10,4p4?[

antoniya [11.8K]

I believe the answer is Selenium, SE

I hope this helps

5 0

3 years ago

Hard water often contains dissolved Ca2 and Mg2 ions. One way to soften water is to add phosphates. The phosphate ion forms inso

MatroZZZ [7]

Answer:

mass of sodium phosphate required = 25.37 g

Explanation:

Equations of reactions:

3CaCl₂ + 2Na₃PO₄ ---> Ca₃(PO₄)₂ + 6NaCl

3Mg(NO₃)₂ + 2Na₃PO₄ ---> Mg₃(PO₄)₂ + 6NaNO₃

Number of moles of the ions = molarity x volume

Ca²⁺ : 0.052 M x 1.6 L = 0.0832 moles

Mg²⁺ : 0.093 x 1.6 L = 0.1488 moles

From the equations of reaction, number of moles of sodium phosphate required to react with each ion is given as;

For calcium: 2/3 x 0.0832 = 0.0555 moles

For magnesium: 2/3 x 0.1488 = 0.0992 moles

Total number of moles of sodium phosphate required = 0.0555 + 0.0992 = 0.1547 moles

Mass of sodium phosphate = number of moles x molar mass

molar mass of sodium phosphate = 164 g/mol

Mass of sodium phosphate = 0.1547 moles x 164 g/mol = 25.37 g

Therefore, mass of sodium phosphate required = 25.37 g

4 0

3 years ago