How many moles are in 9.8 grams of Calcium?

Answer 1

Strictly, elements such as calcium do not have "moles", but the corresponding term, for Avogadro's Number of atoms of an element, is called "gram Atomic Mass". For calcium, this number is about 40.08 grams. Therefore, 9.8 grams of calcium is about 9.8/40.08 or 0.24 gram atoms, to the justified number of significant digits.

Answer 2

if my calculations are correct it should be 9g (mass) divided by 18 (RFM of H2O) = 0.5

Answer 3

You first need to know what element, or the molecular formula of the 9.8 grams consists of.

Answer 4

The molar mass of calcium is 40 g/mol. Therefore, 9.8 g of calcium is equivalent to 0.245 moles.

Answer 5

Molar mass of water:-18g

=> 18g contains 6.022*1023 molecules

=> 9g contains 6.022*1023 /2=3.011 *1023 molecules

Answer 6

18 moles of atomic hydrogen or 9 moles of molecular hydrogen is needed.

Answer 7

9,8 moles of calcium have 392,76 grams.

Answer 8

.391 moles of Na in NaCL

Answer 9

90/18 = 5 moles

Answer 10

1/2 mol