Chemistry

Atoms and Atomic Structure

Molecular Mass

Top Answer

4.56 moles Kr x 83.798 g/mole = 382.119 grams = 382 grams (to 3 significant figures)NOTE: You should not use more than 3 significant figures since 4.56 moles limits the precision. Thus the answers of 381.66g and 382.1188 g are incorrect.

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0# moles = mass / molar mass = 1.23g / 83.80g/mol =1.47x10^-2 moles There are 1.47x10^-2 moles in 1.23g of krypton

15.8 grams of C6H12O6 is equivalent to 0.087 moles.

The answer is 3.97 moles.

0,27 moles of calcium is equivalent to 10,82 grams.

If the molecular weight is 30 grams/mole, you need to know the number of moles to calculate the weight. If you have 1 mole, this will yield 30 grams of krypton.

Moles = mass in grams / atomic weight So moles in 15.01 g of Ar = 15.01 / 39.948 = 0.38 moles

100 grams of carbon dioxide contain 2,27 moles.

4,5 g of copper is equivalent to 0,0708 moles.

0,27 moles of calcium contain 10,82 g calcium.

The answer is 15,2 moles.

21.99 grams H2O (1mol H2O/18.016 grams) = 1.221 moles H2O

5 moles of carbon-12 weight 60 g.

6 grams 12C (1 mole 12C/12.01 grams) = 0.5 moles 12C ===========

35.0 moles nitrogen (1 mole N/14.01 grams) = 2.50 moles nitrogen ----------------------------

12.0107 grams per mole of carbon / 6.05 grams = 1.98524 moles

atoms are in 5.00x10^-2 moles of krypton is 1013.9558

The molar mass of Aluminium hydroxide is 78 g/mol. Therefore there are 5.12 moles in 400 grams of aluminium hydroxide.

Divide 96 by molecular mass.So the answer is 6mol

16 grams of oxygen how many moles is 0,5 moles.

How many moles of atoms are contained in 382 g Co

how many moles are in 5.6 grams of Na?

how many moles are in 5.00 grams of CuSO4

Molarity = moles of solute/Liters of solution ( 75.0 ml = 0.075 Liters ) Get moles NaBr 1.5 M NaBr = moles NaBr/0.075 Liters = 0.1125 moles NaBr (102.89 grams/1 mole NaBr) = 11.575 grams NaBr ( call it 12 grams ) ----------------------------------------------------

74.3 g Na2CrO4 x 1 mole/162 g = 0.459 moles (3 sig figs)

how many grams are contained in 11.89 pounds?

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