Density is A) the amount of mass in an object
B) the amount of mass in a given amount of space
C) the amount of space an object takes up
D) the weight of an object

b

Explanation:

Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water).

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

d: the voltage of the secondary coil is less than that of the primary coil.

im not suree sorry if wrong