When a chemical reaction is at equilibrium,

the concentration of each reactant and the

concentration of each product must be

(1) constant

(2) variable

(3) equal

(4) zero

2. What trend would you predict for the next ten years for each region

Why the noble gases tend not to react

Which of the following may be used by employers to inform workers about hazardous materials A. Employee training and SDS B. Memos and handouts C. SDS and warning signs D. Employee training and memos

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

Which substance represents a compound? 1. C (s) 2. Co (s) 3. CO (g) 4. O2 (g)

How many moles of ammonia are produced when 8 moles of nitrogen gas react with hydrogen gas?

If a mass of gas is confined in a closed container with a movable piston above the gas and a small downward force is applied to the piston, the volume of the gas will be a. increased considerably. b. reduced considerably. c. reduced slightly. d.

If an atom has 8 valence electrons, how many electrons does it need to gain to achieve a stable electron configuration?

About how many miles on Earth are equal to one degree of latitude?

What are the allotropes of sulphur And phosphorus?