If four moles of hydrogen react with four moles of oxygen to produce water, what is the excess reactant ?

a. oxygen
b. water
c. hydrogen

: p

What is the smallest component or the most basic building block of any element ? a. an atom, b.a compound c.gas d.element

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate