Which three elements have the most similar chemical properties? A. O, N, Si

B. K, Rb, Cs

C. Ar, Kr, Br

D. B, C, N

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.