2. Given the reaction: Ca(s) + 2H2010 - Ca(OH)2(aq) + Ha(s) When 40.1 grams of Ca(s) reacts completely with the water, what is the total volume, at STP, of Ha(s)
produced?
A 1.00 L
B 2.00 L
c. 44,8 L
D 22.4 L

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Which samples do the atoms have the least kinetic energy