Would you expect each of the following atoms to gain or lose electrons when forming ions? What ion is the most likely in each case? (Type your answer using the format [O]2- for O^2-.)

(a) Al 1 gain electrions lose electrons     ion formed Answer is case sensitive. 2	(b) Fr 3 gain electrions lose electrons     ion formed Answer is case sensitive. 4
(c) Na 5 gain electrions lose electrons     ion formed Answer is case sensitive. 6	(d) Cl 7 gain electrions lose electrons     ion formed Answer is case sensitive. 8
(e) P 9 gain electrions lose electrons     ion formed Answer is case sensitive. 10	(f) S 11 gain electrions lose electrons     ion formed Answer is case sensitive. 12

Express the composition of each of the following compounds as the mass percents of its elements.

	C	H	O
(a) formaldehyde, CH2O	Enter a number. 1%	Enter a number. 2%	Enter a number. 3%
(b) glucose, C6H12O6	Enter a number. 4%	Enter a number. 5%	Enter a number. 6%
(c) acetic acid, HC2H3O2	Enter a number. 7%	Enter a number. 8%	Enter a number. 9%

Calculate the concentration of all ions present in each of the following solutions of strong electrolytes.

(a) 0.250 mol of Ca(NO3)2 in 100.0 mL of solution Ca2+ Enter a number with the correct number of significant figures. 1 M NO3- Enter a number with the correct number of significant figures. 2 M (b) 2.5 mol of Na2SO4 in 1.25 L of solution Na+ Enter a number with the correct number of significant figures. 3 M SO42- Enter a number with the correct number of significant figures. 4 M

(c) 5.00 g of NH4Cl in 500.0 mL of solution NH4+ Enter a number with the correct number of significant figures. 5 M Cl - Enter a number with the correct number of significant figures. 6 M (d) 1.00 g K3PO4 in 700.0 mL of solution K+ Enter a number with the correct number of significant figures. 7 M PO43- Enter a number with the correct number of significant figures. 8 M

A diagram for an open-tube manometer is shown below.

If the flask is open to the atmosphere, the mercury levels are equal. For each of the following situations in which a gas is contained in the flask, calculate the pressure in the flask in torr, atmospheres, and pascals.

(a) h_a = 154 mm

Enter a number with the correct number of significant figures.

1 torr

Enter a number with the correct number of significant figures.

2 atm

Enter a number with the correct number of significant figures.

3 pascals
(b) h_b = 215 mm

Enter a number with the correct number of significant figures.

4 torr

Enter a number with the correct number of significant figures.

5 atm

Enter a number with the correct number of significant figures.

6 pascals
(c) Calculate the pressures in the flask in parts a and b (in torr) if the atmospheric pressure is 660. torr.
case a

Enter a number with the correct number of significant figures.

7 torr
case b

Enter a number with the correct number of significant figures.

8 torr

Consider the reaction below for which K = 1.30 10².

A(g) + B(g) C(g)

Assume that 0.359 mol C(g) is placed in the cylinder represented below. The temperature is 340.0 K and the barometric pressure on the piston (which is assumed to be massless and frictionless) is constant at 1.00 atm. The original volume (before the 0.359 mol C(g) begins to decompose) is 10.02 L. What is the volume in the cylinder at equilibrium?

Enter a number with the correct number of significant figures.

1 L