Answer:
I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.
125 Each half life it divides by 2 the amount
1000/2=500
500/2=250
250/2=125
1.) Gas given off
2.) precipitate formed
3.) large amount of heat given off
4.) Color change
we are asked in this problem to determine the mass of a liquid in a small container. In order to determine the mass, we use an analytical balance for greater accuracy by first weighing the whole system (liquid+beaker). Then transfer the liquid to another container and completely dry the beaker (wash and dry). measure the weight of the beaker. The mass of the liquid is equal to the mass of the system minus the mass of the beaker.
