A 105.5 g sample of a metal was placed into water in a graduated cylinder, and it completely submerged. The water level rose from 25.4 mL to 86.0 mL. Use data in Table 1.1 to identify the metal.

Table 1.1

density

Enter a number with the correct number of significant figures.

1 g/mL
metal

Answer is case sensitive.

2

Calculate the number of grams for the following.

(a) 6.27 mol of gold

Enter a number with the correct number of significant figures.

1 g
(b) 0.053 mol of uranium

Enter a number with the correct number of significant figures.

2 g
(c) 16.4 mol of Ne

Enter a number with the correct number of significant figures.

3 g
(d) 4.09 10^-4 mol of plutonium

Enter a number with the correct number of significant figures.

4 g

Which types of compounds contain the majority of the oxygen found in the human body? (Select all that apply.)

For the following reaction, fill in the table. (Enter masses to four significant figures.)

2 C₂H₆(g) + 7 O₂(g) 4 CO₂(g) + 6 H₂O(g)

	C2H6(g)	O2(g)	CO2(g)	H2O(g)
Number of molecules	Enter an exact number. 1	Enter an exact number. 2	Enter an exact number. 3	Enter an exact number. 4
Number of atoms	Enter an exact number. 5 C Enter an exact number. 6 H	Enter an exact number. 7 O	Enter an exact number. 8 C Enter an exact number. 9 O	Enter an exact number. 10 H Enter an exact number. 11 O
Number of moles of molecules	2	Enter an exact number. 12	Enter an exact number. 13	Enter an exact number. 14
Mass	15 g	16 g	17 g	18 g
Total mass of reactants	19 g
Total mass of products			20 g

These drawings represent beakers of aqueous solutions. Each orange circle represents a dissolved solute particle.

(a) Which solution is most concentrated?
1 ---Select--- Solution A Solution B Solution C Solution D Solution E
(b) Which solution is least concentrated?
2 ---Select--- Solution A Solution B Solution C Solution D Solution E
(c) Which two solutions have the same concentration?

3

Solution A and Solution E Solution B and Solution D     Solution B and Solution E Solution C and Solution D none of the pictured solutions

(d) When solutions E and F are combined, the resulting solution has the same concentration as which solution?
4 ---Select--- Solution A Solution B Solution C Solution D Solution E none of the pictured solutions
(e) When solutions C and E are combined, the resulting solution has the same concentration as which solution?
5 ---Select--- Solution A Solution B Solution C Solution D Solution E none of the pictured solutions
(f) If you evaporate half of the water from solution B, the resulting solution will have the same concentration as which solution?
6 ---Select--- Solution A Solution B Solution C Solution D Solution E none of the pictured solutions
(g) If you place half of solution A in another beaker and then add 250 mL of water, the resulting solution will have the same concentration as which solution?
7 ---Select--- Solution A Solution B Solution C Solution D Solution E none of the pitured solutions