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3 years ago

Record the temperature shown on the thermometer to the nearest half of a degree.

Chemistry

2 answers:

Lina20 [59]3 years ago

5 0

Answer:

22.5

Explanation:

VikaD [51]3 years ago

3 0

Answer:

22.5

Explanation:

I did the assignment

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How many moles of oxygen gas molecules would you need to make 12.5 moles of water

horrorfan [7]

Answer: 6.25 mol

Explanation:

From the reaction that produces water from its elements (shown in the image), we know that for every mole of oxygen gas consumed, 2 moles of water are produced.

This means that 12.5/2=<u>6.25 mol</u> of oxygen gas is needed.

7 0

2 years ago

Fill in the missing piece of the table

djyliett [7]

Answer: The final volume $V_2$ is 263.09 ml

Explanation:

To calculate the final volume of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{V_1}{T_1}=\frac{V_2}{T_2}$

where,

$V_1\text{ and }T_1$ are the initial volume and temperature of the gas.

$V_2\text{ and }T_2$ are the final volume and temperature of the gas.

We are given:

$V_1=156ml\\T_1=215^oC=(215+273)K=488K\\V_2=?\\T_2=550^0C=(550+273)K=823K$

Putting values in above equation, we get:

$\frac{156}{488}=\frac{V_2}{823}\\\\V_2=263.09ml$

Thus final volume $V_2$ is 263.09 ml

5 0

3 years ago

the temperature of a balloon rises from 275 degrees k to 395 degrees k, what would the ending volume be if it started at 5 L

Airida [17]

<h3>Answer:</h3>

7.182K

<h3>Explanation:</h3>

From the question we are given;

Initial temperature, T1 = 275 K
Final temperature, T2 = 395 K
Initial volume, V1 = 5 L

We are required to calculate the final volume, V2

Charles's law is the law that relates the volume of a gas and its temperature.
It states that the volume of a fixed mass of a gas and its absolute temperature are directly proportional at a constant pressure.
Therefore;

$\frac{V1}{T1}=\frac{V2}{T2}$