A piston was expanded from 275.2 mL to 519.9 mL, after which it contained 0.07995 mol of gas. How many moles of gas were intially in the system?

How many grams of magnesium metal will react completely with 8.3 liters of 5.5 m hcl? show all of the work needed to solve this problem. mg (s) + 2hcl (aq) → mgcl2 (aq) + h2 (g)

What’s the scientific notation for the number 6,840,000,000

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form