Ahydrate of cocl2 with a mass of 6.00g is heated strongly. after cooling, the mass of the anhydrate is 3.27g.
a) how many grams of h2o were lost from the hydrate?

How many molecules are found in 1.32 mol of nacl?

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)