Can someone help and answer this please? Doctors recommend taking vitamin (C) In winter days, How many moles of
Vitamin C (C. H.O.), are there in 528 g of Vitamin C?

a) moles
b) 2.75 moles
c) 3 moles
d)5 moles

What elements have 2 electrons inthe 4s sublevel

Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j

An excess of lithium oxide undergoes a synthesis reaction with water to produce lithium hydroxide li2o+h2o→2lioh if 1.05 g of water reacted, what is the theoretical yield of lithium hydroxide? a) 5.83 x 10–2 g lioh b) 1.17 x 10–1 g lioh c) 2.79 x 100 g lioh d) 1.40 x 100 g lioh