What volume of a 2.0 M solution is needed to provide 0.50 mol of NaOH? (1) 0.25 L (2) 0.50 L (3) 1.0 L (4) 2.0 L

Let the letter M stand for a member of Group 13. What is the formula of the combination of this element with bromine? With oxygen? Explain.

What is the difference between 0.50 mol HCl and 0.50 M HCl?

A water solution contains 0.50 mol of HO. How much NaOH should be added to the HCI solution to exactly neutralize it? (1) 1.0 mol, (2) 2.0 mol, (3) 0.25 mol, (4) 0-50 mol.

What is the molarity of each of the following solutions: 15.0 g of

$$Al_2(SO_4)_3$$

in 0.250 mL solution.

Multiply. $m^{2}(2 m-5)(3 m+8)$ _____.

A certain volume of a $0.50 \mathrm{M}$ solution contains $4.5 \mathrm{~g}$ of a salt. What mass of the salt is present in the same volume of a $2.50 \mathrm{M}$ solution?

What Is the molarity of an $\mathrm{H}_{2} \mathrm{SO}_{4}$ solution if 0.25 L of the solution contains 0.75 mol of $\mathrm{H}_{2} \mathrm{SO}_{4}$? (1) 0.33 M (2) 0.75 M (3) 3.0 M (4) 6.0 M

A 1-gram sample of a compound is added to 100 grams of $\mathrm{H}_2 \mathrm{O}(\ell)$ and the resulting mixture is stirred thoroughly. Some of the compound is then separated from the mixture by filtration. Based on Table $\mathrm{F}$, the compound could be?

(1) $\mathrm{AgCl}$

(2) $\mathrm{CaCl}_2$

(3) $\mathrm{NaCl}$

(4) $\mathrm{NiCl}_2$

In a true solution, the dissolved particles (1) are visible to the eye, (2) will settle out on standing, (3) are always solids, (4) cannot be removed by filtration.

Carbon dioxide gas has a solubility of 0.0972 g/100 g $\mathrm{H}_{2} \mathrm{O}$ at $40^{\circ} \mathrm{C}$. Expressed in parts per million, this concentration is closest to (1) 0.972 ppm, (2) 9.72 ppm, (3) 97.2 ppm, (4) 972 ppm.

What is the molarity of a solution that contains 40. g of NaOH in 0.50 L of solution? (1) 1.0 M (2) 2.0 M (3) 0.50 M (4) 0.25 M

Most ionic substances are soluble in water cause water molecules are (1) nonpolar, (2) inorganic, (3) ionic, (4) polar.

Why is salt (NaCl) put on icy roads and sidewalks in the winter? (1) It is ionic and lowers the freezing point of water. (2) It is ionic and raises the freezing point of water. (3) It is covalent and lowers the freezing point of water. (4) It is covalent and raises the freezing point of water.