Ask question

Ask question

All categories

Paladinen [302]

3 years ago

10

The density of gold is approximately .1785 g/L. What is the mass of a sample of helium that occupies 50.0 L of space? Round your

answer to the correct number of significant figures. 1.00 g 9.00 g 50.0 g 280. g

1 answer:

Olegator [25]3 years ago

7 0

What is the purpose for golds density?

You might be interested in

The first step in industrial nitric acid production is the catalyzed oxidation of ammonia. Without a catalyst, a different react

murzikaleks [220]

<u>Answer:</u> The value of $K_{eq}$ is $4.84\times 10^{-5}$

<u>Explanation:</u>

We are given:

Initial moles of ammonia = 0.0280 moles

Initial moles of oxygen gas = 0.0120 moles

Volume of the container = 1.00 L

Concentration of a substance is calculated by:

$\text{Concentration}=\frac{\text{Number of moles}}{\text{Volume}}$

So, concentration of ammonia = $\frac{0.0280}{1.00}=0.0280M$

Concentration of oxygen gas = $\frac{0.0120}{1.00}=0.0120M$

The given chemical equation follows:

$4NH_3(g)+3O_2(g)\rightleftharpoons 2N_2(g)+6H_2O(g)$

<u>Initial:</u> 0.0280 0.0120

<u>At eqllm:</u> 0.0280-4x 0.0120-3x 2x 6x

We are given:

Equilibrium concentration of nitrogen gas = $3.00\times 10^{-3}M=0.003$

Evaluating the value of 'x', we get:

$\Rightarrow 2x=0.003\\\\\Rightarrow x=0.0015M$

Now, equilibrium concentration of ammonia = $0.0280-4x=[0.0280-(4\times 0.0015)]=0.022M$

Equilibrium concentration of oxygen gas = $0.0120-3x=[0.0120-(3\times 0.0015)]=0.0075M$

Equilibrium concentration of water = $6x=(6\times 0.0015)]=0.009M$

The expression of $K_{eq}$ for the above reaction follows:

$K_{eq}=\frac{[H_2O]^6\times [N_2]^2}{[NH_3]^4\times [O_2]^3}$

Putting values in above expression, we get:

$K_{eq}=\frac{(0.009)^6\times (0.003)^2}{(0.022)^4\times (0.0075)^3}\\\\K_{eq}=4.84\times 10^{-5}$

Hence, the value of $K_{eq}$ is $4.84\times 10^{-5}$

4 0

3 years ago

When 2.00 kJ of energy is transferred as heat to nitrogen in a cylinder fitted with a piston with an external pressure of 2.00 a

Vilka [71]

Answer: B

Explanation:

6 0

3 years ago

The three isomers of pentane have different

8_murik_8 [283]

The three isomers of pentane have different structural formulas.

8 0

3 years ago

Read 2 more answers

Cerebrum is made of ____ matter? 4 letter word

katen-ka-za [31]

Gray matter hope this helps!

7 0

3 years ago

Read 2 more answers

Sarah wants to find out how much time it would take to drive from her home to New York. At an average, she would drive at 55 mil

dimaraw [331]

The answer to your question is 13 hours/A

8 0

3 years ago

Read 2 more answers