How many moles of water are in 1.23 x 10^18 water molecules?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Ab c or d ? i’m not sure what the answer is