The formulas N2, H20, and CO2 all represent molecules, which are defined as what?

Which of the following statements is true? A. Sound waves are the only waves that reflect. B. An echo is a sound wave reflection. C. In reflection, all of the initial energy of the sound wave bounces back. D.

What are four basics states of matter

Assume that the air in this problem is an ideal gas with a composition that is 78.0% N2 and 22.0% O2. (a) How many moles of air are in a volume of one cubic meter at room temperature (293.15 K) at a pressure of one atmosphere

4 physical properties of lanthanum

Balance the following equation and determine the mole ratio of Cl2 to CCl4. CS2 + Cl2 CCl4 + S2Cl2 ) A) 1:1 ) B) 2:4 ) C) 1:2 ) D) 3:1 ) E) 1:3

Which of the following atoms will not react with water? A. K B. Li C. Pb D. Na

Which of the following is not a component of plasma? A. Carbon monoxide B. Blood C. Water D. Oxygen

The atomic radius of an element _ when you move from the top to the bottom of a family. O decreases O increases

Lowest density of all elements

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.