How many atoms of Ca are present in 80.156 grams of Ca? 1.2044 x 1024
2.4088 x 1024
4.8270 x 1025
1.9346 x 1027

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)