Exam 2_Question 13 The image shows two types of light hitting a metal surface. One causes electrons to be ejected, and the other does not. Which statement best explains this behavior?

Determine the empirical formula for the compound with the molecular formula C14H10O4. Assume all atomic weights are whole numbers unless otherwise noted. 

In a chemical reaction, 18.0 grams of hydrogen peroxide decompose into 16.0 grams of water and oxygen gas. What mass of oxygen gas is produced?

A compound has an empirical formula of C3H7N2O. The molar mass of the compound is 174 gmol. What is the molecular formula of the compound? Assume all atomic weights are whole numbers unless otherwise noted. 

An unknown Element X has two naturally occurring isotopes:X-62 (mass = 62.0 amu)X-64 (mass = 62.0 amu)The average atomic mass is 62.8 amu. What is the percent abundance of each isotope? Round each percent to the nearest whole number or tenth as appropriate. 

What is the formula weight (molar mass) of calcium chloride, CaCl2? Use the following atomic masses:Ca=40.1 gmolCl=35.5 gmolRound your final answer to the tenths place. Use the atomic masses provided.

Identify the name of K2SO3.

Find the product.(x – 10)(x – 8)

Find the product.(4x + 6)(x – 11)

Simplify the following by combining like terms.7×7 + 4×6 + 4×7