If 32.5 grams of CaO are dissolved in 212 grams of water, what is the concentration of the solution in percent by mass?

6.52% CaO

8.67% CaO

13.3% CaO

15.3% CaO

Why is the manatee classified as an herbivore?

What is the pH when the hydrogen ion concentration is 7.0 * 10^-3 M? A. 1.9 B. 2.2 C. 3 D. 3.3

Which biological molecule is in the shape of a double helix? A. Enzyme B. Deoxyribonucleic acid (DNA) C. Amino acid D. Ribonucleic acid (RNA)

What is the concentration of hydroxide ions in a solution with a pH of 7.55? 2.82 * 10-8 3.55 * 10-7 9.36 * 10-3 4.17 * 10-11

A 6.00 gram sample of solid gold was heated from 274 K to 325 K. How much energy was involved? Cs of gold is 0.129 J/g oC.

What is the percent of H2O in a sample of a hydrate whose mass is 1.1290 g if the mass of water in the sample was 0.1660 g?

Why does conduction occur in solids and liquids easier compared to gases? Because the particles in gases are closer together and move slower Because the particles in gases are farther apart and move faster.

Write a balanced equation for the combustion of gaseous methane (CH4), a majority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.

Pedro listed characteristics of two types of protists in a chart. Two Groups of Protists X Y Often multicellular Are usually autotrophic Include euglenoids Are heterotrophs Reproduce using spores Include different molds Which headings best complete

Which of the following is a characteristic of nonmetals? a. nonmetals are often shiny and hard. b. nonmetals are often malleable. c. Nonmetals do not conduct electricity. d. nonmetals are often ductile.