How many calcium (Ca) atoms are in the chemical formula:

CaCO3

1

5

3

None

Common table salt is sodium chloride. when table salt is dissolved in water, the solution conducts electricity because

What is the density of an object with mass 150 and volume 30

In the formula X2 (SO4) 3, the X represents a metal. This metal could be located on the Periodic Table in (1) Group 1 (3) Group 13 (2) Group 2 (4) Group 14

A group of students investigated the chemical reaction of a mixture of sodium chloride and silver nitrate. Which tools should be used when determining if the chemical reaction obeys the law of conservation of mass? 8.

A decrease in seawater temperature or an increase in salinity causes

How does light pollution affect plants and animals? Light pollution harms plants and animals because they confuse it with

In what ways are polyatomic ions like simple ions

How does oxygen obey the octet rule when reacting to form compounds? A) It gains electrons. B) It gives up electrons. C) It does not change its number of electrons. D) Oxygen does not obey the octet rule.

Which equation obeys the law of conservation of mass? A. 2Fe+3O2 - -> 2Fe2O3 B. 4Fe+O2--> 2Fe2O3 C. Fe+O2--> Fe2O2 D. 4Fe+3O2--> 2Fe2O3

Why do airbags fill evenly with gases?