I went on vacation to Ireland once in they don’t use American money there; they use euros. One dollar is equivalent to 0.82 euros. I exchange $100 into euros and then I spent 65 euros
what conversion factor would you use in the following problem (what is equal to what?)

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.