2. Atoms & Elements
Mole Concept
04:02
Practice this topic
- Multiple Choice
If a sample of sodium chloride, NaCl, contains 73.1 kg, what is its number of formula units?
5261views22rank1comments - Multiple Choice
Calculate the number of oxygen atoms found in 783.9 g NiCl2 • 6 H2O.
4050views18rank3comments - Multiple Choice
If the density of water is 1.00 g/mL at 25°C, calculate the number of water molecules found in 1.50 x 103 µL of water.
4787views5rank3comments - Multiple Choice
A cylindrical copper wire is used for the fences around a house. The copper wire has a diameter of 0.0750 in. How many copper atoms are found in 5.160 cm piece? The density of copper is 8.96 g/cm3. (V = π • r2 • h)
4082views27rank - Textbook Question
A can of diet soda contains 180 mg of the low-calorie sugar substitute aspartame (C14H18N2O5). How many molecules of aspartame are in the can of soda? (LO 3.4) (a) 3.7 * 10^23 (b) 3.7 * 10^20 (c) 3.2 * 10^25 (d) 1.2 * 10^22
971views - Textbook Question
How many moles of chloride ions are in 7.75 g of FeCl3? (LO 3.4) (a) 4.78 * 10^-2 (b) 1.59 * 10^-2 (c) 1.43 * 10^-1 (d) 1.91 * 10^-1
1340views - Textbook Question
Glycine, an amino acid used by organisms to make proteins, is represented by the following molecular model. (c) Calculate how many moles of glycine are in a 100.0-g sample of glycine.
580views - Textbook QuestionWhich sample has the greatest mass? (LO 2.16)(a) 5.5 mol of C (b) 2.1 mol of S (c) 4.2 mol of Be (d) 0.52 mol of Ag1029views1rank