Which choice below would affect the rate of reaction in the opposite way from the other four?
a. cool the reaction down
b. add a catalyst
c. decrease the pressure
d. use larger pieces of solid reactants
e. decrease the concentration of the reactants

What is impossible to do with a hypothesis

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent