Which change will decrease the number of effective collisions during a chemical reaction?

adding a catalyst

increasing the surface area

decreasing the temperature

increasing the reactant concentrations

increasing the volume of the reactants

5. At what phase of mitosis does the number of chromosomes double? a. prophase b. metaphase c. anaphase d. telophase

How does the amount of oxygen in the water affect the growth of a plant?

What force pulled the solar system together

What gas is produced when aqueous sodium hydroxide reacts with ammonium chloride

How does the force of gravity on Jupiter compare to the force of gravity on Earth?

How many atoms of chlorine would a molecule of carbon tetrachloride have? a. 0 c. 4 b. 1 d. 7

Suppose you perform an experiment at 21.5 oc and 1.00 atm and generate helium gas in the laboratory. what do you expect the molar volume of the helium to be?

Which best describes Rutherford's model of the atom? fish swimming in an aquarium a sports stadium with a marble at the center a scoop of chocolate chip ice cream a dense, solid ball

Which reaction represents the process of neutralization? Mg (s) + 2HCl (aq) MgCl 2 (aq) + H 2 (g) HCl (aq) + KOH (aq) KCl (aq) + H 2 O (l) C. Pb (NO 3) 2 (aq) + CaCl 2 (aq) Ca (NO 3) 2 (aq) + PbCl 2 (s) D. 2KClO 3 (s) 2KCl (s) + 3O 2 (g)

Which of the following is a correct representation of the isotope of carbon that has 7 neutrons? carbon-7 carbon-13 carbon-6 carbon-12