help with science homework?

Alexandra

New member
Hydrogen and oxygen gas combine explosively to produce water. Write a balanced chemical equation for this process. If 10 mol of hydrogen reacted with oxygen. what volume of liquid water could be produced?

Isotonic saline is often given to patients intravenously to replenish lost fluids. Isotonic saline is a 0.9% (g/100ml) solution of salty water. You are asked tom make up 21 of isotonic saline. How much salt should you weigh out?

Please can someone tell my how I would work these questions out.
 
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