True or false: the density of an object can be calculated by dividing its length by its width.

What is the octet rule and how is it used in covalent bonding?

Which group 4a element is a metalloid? tin, silicon, lead, carbon

How many HNO3 molecules are in 4.20 grams?

Solutions that are acidic have a ___ concentration of H + ions and a ___ concentration of OH-ions. Solutions that are basic have a ___ concentration of OH-ions and a ___ concentration of H + ions.

Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of lithium sulfide and copper (II) nitrate are mixed.

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.