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2 years ago

Is this statement true or false?

Chemistry

2 answers:

nadezda [96]2 years ago

7 0

Answer:

True

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ratelena [41]2 years ago

7 0

True, the substance reacted to either the other substance or the surrounding air

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Using the phase diagram for CO2, what phase is carbon dioxide in at -60C and 1 atm pressure? A. Solid B. Gas C. At the melting p

ANTONII [103]

Answer:

B. Gas.

Explanation:

Kindly, see the attached image of CO₂ phase diagram.

Extrapolating the T from - 60.0°C and P from 1.0 atm, you will find that CO₂ is in the gas phase.

So, the right choice is: B. Gas.

7 0

3 years ago

Read 2 more answers

At 500°C the equilibrium constant, Kp, is 4.00 × 10–4 for the equilibrium: 2HCN(g) H2(g) + C2N2(g) What is Kp for the following

Andrews [41]

<u>Answer:</u> The value of $K_p$ for the equation is $2.5\times 10^3$

<u>Explanation:</u>

The given chemical reaction is:

$2HCN(g)\rightleftharpoons H_2(g)+C_2N_2(g);K_1$

The chemical equation for which the equilibrium constant is to be calculated follows:

$H_2(g)+C_2N_2(g)\rightleftharpoons 2HCN(g);K_p$

As, the equation is the result of the reverse of given reaction. So, the equilibrium constant for the equation will be the inverse of equilibrium constant for the given reaction.

The value of equilibrium constant for the equation is:

$K_p=\frac{1}{K_1}$

We are given:

$K_1=4.00\times 10^{-4}$

Putting values in above equation, we get:

$K_p=\frac{1}{4.00\times 10^{-4}}=2.5\times 10^3$

Hence, the value of $K_p$ for the equation is $2.5\times 10^3$

3 0

4 years ago

How does a calorimeter follow the Law of Conservation of Energy?

dusya [7]

It is based on the law of conservation of energy , which says that energy is neither created nor destroyed during a chemical reaction . I’m calorimeter , this means that the heat gained by the water in calorimeter must have been released by the sample or reaction taking place in the calorimeter .

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4 years ago

Read 2 more answers

What determines how much energy an area receives

Lemur [1.5K]

The more focused the rays are, the more energy an area receives, and the warmer it is. The lowest latitudes get the most energy from the Sun. The highest latitudes get the least. The difference in solar energy received at different latitudes drives atmospheric circulation.

7 0

3 years ago

Which of the following conversion factors is correct to convert 0.25 moles of Na to particles of Na?

Stolb23 [73]

Answer:

6.02×10²³ particles / 1 mol

Explanation:

In this question the choices are missed.

For determine the particles of Na, in 0.25 moles we should know that the mole referrs to the Avogadro's number.

1 mol of anything contains 6.02×10²³ entities, that's why we should apply this conversion factor to find the final answer:

0.25 mol . 6.02×10²³ particles / 1 mol = 1.50×10²³ particles

In conclussion: 1.50×10²³ particles of Na are contained in 0.25 moles of Na

5 0

4 years ago