Questions from General Chemistry

Q: True or false? For the reaction represented by the balanced chemical

True or false? For the reaction represented by the balanced chemical equation Mg(OH)2(aq) + 2HCl(aq) 2H2O(l) + MgCl2(aq) for 0.40 mole of Mg(OH)2, 0.20 mol of HCl will be needed.

Q: For each of the following metals, how many electrons will the

For each of the following metals, how many electrons will the metal atoms lose when the metal reacts with a nonmetal? a. sodium b. potassium c. magnesium d. barium e. aluminum

Q: For each of the following nonmetals, how many electrons will each

For each of the following nonmetals, how many electrons will each atom of the nonmetal gain in reacting with a metal? a. oxygen b. fluorine c. nitrogen d. chlorine e. sulfur

Q: Hydrogen gas reacts with each of the halogen elements to form the

Hydrogen gas reacts with each of the halogen elements to form the hydrogen halides (HF, HCl, HBr, HI). Calculate the percent by mass of hydrogen in each of these compounds.

Q: Calculate the mass in grams of each of the following samples.

Calculate the mass in grams of each of the following samples. a. 6.14 * 10-4 moles of sulfur trioxide b. 3.11 * 105 moles of lead(IV) oxide c. 0.495 mole of chloroform, CHCl3 d. 2.45 * 10-8 moles...

Q: Consider the balanced equation C3H8(g) + 5O2(

Consider the balanced equation C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g) What mole ratio enables you to calculate the number of moles of oxygen needed to react exactly with a given number...

Q: When a sodium chromate solution and aluminum bromide solution are mixed,

When a sodium chromate solution and aluminum bromide solution are mixed, a precipitate forms. Complete and balance the equation for this reaction, including the phases of each reactant and product.

Q: Corrosion of metals costs us billions of dollars annually, slowly destroying

Corrosion of metals costs us billions of dollars annually, slowly destroying cars, bridges, and buildings. Corrosion of a metal involves the oxidation of the metal by the oxygen in the air, typically...

Q: Consider a solution with the following ions present: NO3-,

Consider a solution with the following ions present: NO3-, Pb2+, K+, Ag+, Cl-, SO42-, PO43- All are allowed to react, and there are plenty available of each. List all of the solids that will form usi...

Q: Find the item in column 2 that best explains or completes the

Find the item in column 2 that best explains or completes the statement or question in column 1. Column 1 (1) 1 amu (2) 1008 amu (3) mass of the “average” atom of an element (4) number of carbon a...