Bathrubs can drain 6 gallons per minuteHow fast do they drain in oz per second?

Can someone me with these questions plz.

Type the letter that represents the correct location for each particle type below.

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%