Question

Someone please help walk me through my chemistry? I don't understand!!!

Answer 1

1. You are given the reaction, Mg(s) + 2 H2O (l) --> Mg(OH)2 (s) + H2 (g). If you have 5.0 g of Mg, how many grams of water must be used to have all of the Mg react to form Mg(OH)2?

2. You are given the reaction between magnesium and water as follows: Mg(s) + 2 H2O (l) --> Mg(OH)2 (s) + H2 (g). If 3 moles of Mg are reacted with 5 moles of H2O, which is the limiting reactant?

Answer 2

First you make sure the equations are balanced. Then, you calculate the number of moles of whatever substance you have the info to.

Answer 3

It's already balanced....

Answer 4

which one's balanced? Both?

Answer 5

They appear to both be the same equation: Magnesium & Water.

Answer 6

I know. I was reminding her to check every equation to make sure they are balanced first.

Sarah, ANY equation. Make sure it is balanced. Then, did you calculate the number of mole of Mg(the only info you have)?