What’s is the mass in grams of 5.90 mol c8h18?

Mass = 5.90 x 114 = 672.6g.

This can be rounded to 673g

C = 12 grams x 8 = 96 grams  

H = 1 gram x 18 = 18 grams  

Total = 96 + 18 = 114 grams in one mole.  

If you have 5.9 moles, multiply this by the weight of one mole (114 grams) = 672.6 rounded to 673 grams in 5.9 moles.

The mass of 5.90 moles of   has been 672.6 grams.

To calculate the mass of 5.90 moles of the , the molecular mass of the molecule has to be calculated. The molecular mass has been the sum of the mass of the atoms present in the molecule.

A molecule of has been consisted of 8 atoms of Carbon, and 18 atoms of hydrogen.

The molecular weight of = 8 molecular mass of Carbon + 18 molecular mass of Hydrogen

The molecular weight of = (8 12) + (18 1)

The molecular weight of = 114 g/mole.

mass = mole molecular weight

Mass of 5.90 moles of = 5.90 114 grams

Mass of 5.90 moles of = 672.6 grams.

The mass of 5.90 moles of   has been 672.6 grams.

For more information about the mass of a molecule, refer to the link:

link

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms