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2 years ago

What is the mass of H2O

Chemistry

1 answer:

Dovator [93]2 years ago

8 0

Answer:

The exact molecular mass is 18.01528 g/mol

Explanation:

Find this by adding the molecular masses of two hydrogen atoms and one oxygen atom.

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LUCKY_DIMON [66]

The answer is B

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A sample of oxygen gas has a volume of 3.24 L at 29°C. What volume will it occupy at 104°C if the pressure and number of mol are

ohaa [14]

Answer: The final volume of the oxygen gas is 4.04 L

Explanation:

To calculate the final temperature 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 and number of moles.

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:

$V_1=3.24L\\T_1=29^oC=(29+273)K=302K\\V_2=?\\T_2=104^oC=(104+273)K=377K$

Putting values in above equation, we get:

$\frac{3.24L}{302K}=\frac{V_2}{377K}\\\\V_2=4.04L$

Hence, the final volume of the oxygen gas is 4.04 L

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3 years ago

How is helium different from other noble gases?

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Helium only possesses two valence electrons, while the other noble gasses posses eight

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Which of the following molecules contains six bonding electrons?

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Answer:

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