A steel cylinder has a volume of 246 cm3 and a density of 7.93 g/cm3. What is its mass in kilograms? Express your answer in kilograms to three significant figures.

What is the rms speed of cesium atoms that have been cooled to a temperature of 100 nk?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Anurse used a 0.02-mg/l solution of disinfection to clean a patients wound. what is the concentration of the solution expressed as a percentage?