If 14.7 g of calctum is placed in 11.5 g of water, what mass of hydrogen gas is produced?

Name the element in group 17, period 2. (periodic table)

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work