a) Aluminum's mass and weight in grams, kilograms, and pounds are 2700 gm, 2.7 kg, and 5.95 pounds, respectively.
b) Copper's mass and weight in grams, kilograms, and pounds are 8960 gm, 8.96 kg, and 19.75 pounds, respectively.
c) Hydrogen's mass and weight in grams, kilograms, and pounds are 0.09 gm, 0.00009 kg, and 0.000198 pounds, respectively.
d) Iron's mass and weight in grams, kilograms, and pounds are 7870 gm, 7.87 kg, and 17.35 pounds, respectively.
e) Lead's mass and weight in grams, kilograms, and pounds are 11340 gm, 11.34 kg, and 25.0047 pounds, respectively.
f) Nickel's mass and weight in grams, kilograms, and pounds are 8910 gm, 8.91 kg, and 19.6686 pounds, respectively.
g) Oxygen's mass and weight in gram, kilogram, and pound are 13 gm, 0.0013 kg, and 0.0028665 pounds, respectively.
h) The mass and weight of silver in gram, kilogram, and pound are respectively 10500 gm, 10.50 kg, and 23.1525 pounds.
i) The gram, kilogram, and pound weights of sodium are 9700 g, 0.97 kg, and 2.13 pounds, respectively.
j) Tin's mass and weight in grams, kilograms, and pounds are 7290 gm, 7.29 kg, and 16.074 pounds, respectively.
Density is a physical property of matter that measures how much mass is contained in a given volume. It is the ration of mass and volume.
density = mass/volume
1kg = 1000gm
1kg = 2.205 pounds