The atomic number of an element is the total number of which particles in the nucleus?

a. neutronsc. electronsb. protons

According to the equation W = Fd which statement tells what can be done to reduce the amount of force needed to accomplish work?

How many grams of calcium hydride are needed to form 4.850 g of hydrogen gas? express your answer using four significant figures?

Which statement applies to electronegativity? A.) Electronegativity increases across a period. B.) All atoms with the same number of electron shells have equal electronegativities. C.

Which statement best explains water's ability to dissolve covalent compounds?

How many sulfur atoms are in H2SO4?

A man is making chicken noodle soup and has found it to be too salty. What method could he use to make the soup less salty? a. Add equal measured amounts of water to the soup. b. Bring the soup to a boil so that some of the broth evaporates. c.

A solution of H2SO4 (aq) with a molal concentration of 3.97 m has a density of 1.216 g/mL. What is the molar concentration of this solution?

How can you chose values for x when making a table of values representing a real world situation?

If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?

A helium balloon initially at room temperature is dunked into a bucket of liquid nitrogen (T = 77 K). Which of the following will occur?