Which is the best description of description of speed?

a) how fast it takes to travel between 2 distances.
b) how fast an object is moving at one moment.
c) the space between two points.
d) the average acceleration.

What is the formula that this ionic compounds could form sr2+p3-o2-

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

What can be found in the ionosphere