There are only 5.5. x 10^12 metric tonnes of fossil fuels that can be used as a useful resource existing on Earth. Assuming an estimated rate of fossil fuel use of 1 x 10^11 metric tonnes per year, calculate an order of magnitude estimation of the time left before the fossil fuel reserves run out.

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

What is the mass of sodium in 3 moles of sodium chloride

Which statement is usually true about the relationship between activation energy and reaction rates? low activation energy barriers result in low rates. high activation energy barriers result in low rates. low activation energy barriers result in no reaction. high activation energy barriers result in no reaction.