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3 years ago

Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct?

Chemistry

1 answer:

kolezko [41]3 years ago

7 0

They both have the same atomic number

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Someone help please I don’t know the answer to the question I meeed help

mihalych1998 [28]

Answer: 143.3

137+115+104+263+98 divided by 5.Which gives us 143.3

5 0

3 years ago

Typically, a solid chloride unknown (not the AgCl product) for analysis is dried in an oven to remove absorbed water before the

tatyana61 [14]

Answer:

%Cl would be too high if not dried.

Explanation:

Cl (chlorine) is a liquid. During the process of drying AgCl, the chlorine particles evaporate and chlorine is lost.

7 0

3 years ago

When 9.2 g of frozen N2O4 is added to a 0.50 L reaction vessel and the vessel is heated to 400 K and allowed to come to equilibr

Amanda [17]

Answer: The value of $K_c$ for the given reaction is 1.435

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}}{\text{Molar mass of solute}\times \text{Volume of solution (in L)}}$

Given mass of $N_2O_4$ = 9.2 g

Molar mass of $N_2O_4$ = 92 g/mol

Volume of solution = 0.50 L

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{9.2g}{92g/mol\times 0.50L}\\\\\text{Molarity of solution}=0.20M$

For the given chemical equation:

$N_2O_4(g)\rightleftharpoons 2NO_2(g)$

Initial: 0.20

At eqllm: 0.20-x 2x

We are given:

Equilibrium concentration of $N_2O_4$ = 0.057

Evaluating the value of 'x'

$\Rightarrow (0.20-x)=0.057\\\\\Rightarrow x=0.143$

The expression of $K_c$ for above equation follows:

$K_c=\frac{[NO_2]^2}{[N_2O_4]}$

$[NO_2]_{eq}=2x=(2\times 0.143)=0.286M$

$[N_2O_4]_{eq}=0.057M$

Putting values in above expression, we get:

$K_c=\frac{(0.286)^2}{0.143}\\\\K_c=1.435$

Hence, the value of $K_c$ for the given reaction is 1.435

6 0

3 years ago

Choose the correct answer !

zavuch27 [327]

Answer:

Osmium

Explanation:

The metals conduct electricity the best, in this question the metal would be osmium.

4 0

3 years ago

What would happen if there were not enough plants on earth

Sati [7]

Then we would not have oxygen because plants give oxygen in order to breathe

7 0

4 years ago

Read 2 more answers