You add two substances together in a sealed bag and a chemical reaction happens. The mass before the reaction was 167 g. What was the mass after the reaction? Why?

By what factor would the average kinetic energy of the particles by increased if the temperature of a substance was increased from - 49°C to 287°C?

Which of these is outside the solar system A nebula B asteroid belt

What is the correct formula of calcium fluoride

Nicotine, a component of tobacco, is composed of C, H, and N. A 5.250-mg sample of nicotine was combusted, producing 14.242 mg of CO2 and 4.083 mg of H20. What is the empirical formula of nicotine?

Kipps appratus is for what?

Is Ba (NO3) 2 covalent or ionic

An alcohol contains only C, H, and O. When a 1.50mg sample of the alcohol is burned completely in oxygen, 3.30mg of CO2 and 1.80mg of H20 are formed. What is the empirical formula for the alcohol?

Using the field meter, does the field strength increase or decrease as you move away from the bar magnet?

Complete each of the definitions with the appropriate phrase. Precision means that measurements are close to Accuracy means that measurements are close to Anawer Bank each other an accepted value |individual several

Acetylene is hydrogenated to form ethane. the feed to the reactor contains 1.4 mol h2/mol c2h2. (find properties of the reactants/products in appendix of book) a.