An experiment requires 74.2 mL of ethyl alcohol. If the density of ethyl alcohol is 0.790 g/cm3, what is the mass of 74.2 mL of ethyl alcohol?
O a. none of these
O b.58.6 g
O c.93.9 g
O d. 7.90 g
Oe. 10.6 g

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next

Which of the following is not true about the atomic model of substances?