Balance the following chemical equation, then answer the following question.
c8h18(g) + o2(g) →co2(g)+h2o(g)
how many grams of oxygen are required to react with 10.0 grams of octane (c8h18) in the combustion of octane in gasoline?

how do i do this?

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

What is the temperature of one mole of helium gas at stp?

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?