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ohaa [14]
3 years ago
10

On the periodic table, the average atomic mass for carbon is 12.01 g. Why is it not exactly 12.00?

Chemistry
1 answer:
KiRa [710]3 years ago
5 0
The average the natural abundances of the various isotopes of carbon to arrive at the fractional mass.

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what mass of carbon dioxide will be produced when 12.9 g of butane reacts with an excess of oxygen in the following reaction?
Nadya [2.5K]
39.1 gCO2
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3 0
3 years ago
What is the molar mass of water (H2O)?
Sidana [21]

Answer:

The molar mass is: 18.02 g/mol.

Explanation:

  • Mass of two moles of Hydrogen atoms (H2) = 2x 1 g/mol = 2 g/mol.
  • Mass of one mole of water (H2O) = 2 g/mol + 16 g/mol = 18 g/mol.

1 mole of Hydrogen= 1.01, so if we have 2 moles of it here, that would be 2.02.

1 mole of Oxygen (that's all we have here)= 16.00

Once you add the two together (2.02+16.00), you will get 18.02.

I hope this made sense! Have a great day!

3 0
3 years ago
Select the correct answer
vekshin1

Answer:

Temperature

Explanation:

Kinetic energy of gass molecules is directly propotional to the temperature.

4 0
3 years ago
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Which volume of oxygen, at room temperature and pressure, is needed for complete combustion
adell [148]
The molecular formula of methylpropan-1-ol is C4H10O, so the complete combustion equation is: C4H10O + 6O2 --> 4CO2 + 5H2O.  This mean to completely combust 1.0mol of methylpropan-1-ol, 6 mol of O2 is required. Molar mass of O2 is 32 g/mol, so 32g/mol x 6mol = 192 g of O2 is required.  At room temperature and pressure, the density of O2 is 1.3315 g/L (this can be obtained by density of gas = P/RT).  So the volume of O2 = mass/density = 192g/1.3315(g/L) = 144 L = 144 dm3. The answer is B.
5 0
3 years ago
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100 POINTS TO RIGHT AWNSER!!!!
Andreas93 [3]
B your welcome no problem no thank you my pleasure
8 0
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