1.Given that 1g of hydrogen combines completely with 8g of oxygen to form water, how much water can you make with 9g of hydrogen and 32g of oxygen?

Answer 1

We want to find which of these two elements is our limiting amount.

Here's some helpful equations to consider.

8x = 32 //The equation for oxygen.
1x = 9 //The equation for hydrogen.

From these two values, we want to determine the value of x that makes each equation true.

For the first equation, x = 4 and for the second, x = 9.

Because 4 is lower, this means oxygen is our limiting reagent and we can only make 4 molecules of water with 5g of hydrogen left over.