1. How many particles are present in 800 grams of copper (II) sulfide, CuS? The molar mass of CuS is 95.611 g/mol. 2. How many particles are present in 50 grams of aluminum oxide, Al2O3? The molar mass of Al2O3 is 101.961 g/mol.

3. How many particles are present in 150 grams of calcium oxide, CaO? The molar mass of CaO is 56.077 g/mol.

4. How many particles are present in 39 grams of sulfuric acid, H2SO4?

5. How many particles are present in 345 grams of hexane, C6H14?

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

the answer is 0.42 is that is an option. this question provides no info