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ad-work [718]
3 years ago
9

A sample of carbon dioxide gas (CO2) contains 8.551 x 10^25 molecules. How many moles of carbon dioxide does this represent

Chemistry
2 answers:
Gnesinka [82]3 years ago
0 0
Answer:

142.0mol CO2

Explanation:

To convert from molecules to moles we must divide the amount of molecules by Avagadro’s number, 6.02 x 10^23.

8.551 x 10^25 / 6.02 x 10^23 = 142.0mol CO2
vladimir1956 [14]3 years ago
0 0

Answer:

Explanation:

moles= no. of molecules/ avagardo number

        =8.511*10^25/ 6.022*10^23

        =14.13 moles

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The mass of each WtWt isotope is measured relative to C−12C−12 and tabulated below. Use the mass of C−12C−12 to convert each of
Nadya [2.5K]

The question is incomplete , the complete question is;

The mass of each Wt isotope is measured relative to C-12 and tabulated below. Use the mass of C-12 to convert each of the masses to amu and calculate the atomic mass of Wt.

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Answer:

The atomic mass of Wt-296 is 195.9464 amu.

Explanation:

1 amu is defined as 1 by twelfth of the carbon-12 mass.

Mass of an isotope Wt-296 = 24.6622

Mass of an isotope Wt-296 in amu = M

M\times \frac{1}{12 amu}=24.6622

M=24.6622\times 12 amu=295.9464 amu

The atomic mass of Wt-296 is 195.9464 amu.

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