Based on C2H4 + 3 O2 = 2 CO2 + 2 H2O how many moles of O2 are required for the complete combustion of 45 g of C2H4?

if 14.0 g of C2H4 are reacted and the actual yield of H2O is 7.84 g, what is the percent yield of water in the reaction?

if 18.0 g of CO2 are produced, how many grams of H2O are produced?

- 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

fe 55.85 g/mol and h2o 18.02 g/mol.

the objects have the same charge.