How many grams of calcium

160.32 g of Ca

Explanation:

The reaction is this:

Ca + 2HCl → CaCl₂  +  H₂

Mass of produced H₂: 8 g

If we convert the mass to moles → 8 g . 1mol/2g = 4 mol

So ratio is 1:1. Therefore 4 moles of H₂ were produced by 4 moles of Ca.

Let's convert the moles to mass → 4 mol . 40.08 g/1mol = 160.32 g

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8