What amount of H2(g) is produced when 12g of magnesium reacts completely with dilute HCl(aq)

Question

Mg(s) + 2HCl(aq)________MgCl2(aq) + H2(G)

Answer 1

You can make an arrow one of two ways. ==> or ---->.

When you say "amount of hydrogen" is that amount by volume or amount by mass. I will assume you mean mass.

Convert 12 g Mg to moles. moles = grams/atomic mass.

Using the coefficients in the balanced equation, convert moles Mg to moles hydrogen.

Convert moles hydrogen to grams using grams = moles x molar mass.

Answer 2

The arrow is after 2HCL and giving the following. MgCl2(aq) + H2 (g)

Answer 3

What amount of H2(g) is produced when 12g of magnesium reacts completely with dilute HCl(aq)
Mg(s) + 2HCl(aq) ------> MgCl2(aq) + H2(g)

Answer 4

4.05