3 years ago

Each element has a unique number of ___

Chemistry

2 answers:

faltersainse [42]3 years ago

6 0

Protons is the answer

Zigmanuir [339]3 years ago

4 0

the answer is protons

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yes

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The cell theory states that all biological organisms are composed of cells; cells are the unit of life and all life come from preexisting life. The cell theory is so established today that it forms one of the unifying principles of biology.

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2 years ago

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3 years ago

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Pie

Answer: 128 g/mol

Explanation:

Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of the molar mass of its particles.

Mathematically, that is:

$\frac{Rate_1}{Rate_2}=\sqrt{\frac{MolarMass_2}{MolarMass_1} }$

Since, you know the ratio of two rates and the molar mass of one gas, you can calculate the molar mass of the other gas.

The molar mass of the oxygen molecule, O₂ = 2×16.0g/mol = 32.0 g/mol.

In the coming equations, I will use 32 g/mol for simplicity of writing.

$\frac{Rate_1}{Rate_2}=2 \\ \\ \\ MolarMass_1=32g/mol\\\\\\ 2=\sqrt{\frac{MolarMass_2}{32g/mol} } \\ \\ \\ 4=\frac{MolarMass_2}{32g/mol}\\ \\ \\ MolarMass_2=128g/mol$

So, the molecular mass of the unnknown gas is 128 g/mol.

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3 years ago