54 Chemistry 106 Name: Post-Lab Assessment Questions (20 points): 1. (2 pts) How many grams of H20 are necessary to weigh out 1 mole of H20? 2. (2 pts) How many molecules of water are there one mole of H20? 3. (2 pts) How many moles of H20 are there in 1.0 g of H20? 4. (2 pts) How many molecules of H20 are there in 1.0 g of H20? 5. (4 pts) If a gumdrop is 1.5 cm3 in volume, what would the volume of a dozen gumdrops be? (4 pts) If a raindrop is 0.05 cm3 in volume, what would the volume of an Avogadro Number of raindrops be? 6. (4 pts) Lauric acid is used to make the detergents found in shampoo and toothpaste. Lauric acid is similar to stearic acid, but only has 12 carbons. Show the Lewis structure for lauric acid. 7.
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Related questions
1. You have 22.1 moles of nitric acid (HNO3). How many oxygenatoms do you have?
2. The reaction shown below showsthat silver nitrate reacts with sodium chloride to make silverchloride and sodium nitrate. How many grams of silver chloride willbe produced from 100 g of silver nitrate when it is mixed with100,000,000 grams of sodium chloride?
AgNO3 + NaCl ? AgCl + NaNO3
3.How many moles of NaOH are in 25.0 mL of 0.212MNaOH? There are 1,000 ml per liter.
4. 25.0 mL of 0.212 M NaOH isneutralized by 13.6 mL of an HCl solution. The molarity of the HClsolution is...
The relevant balanced reaction is shown here:
NaOH + HCl => NaCl + H2O
5. There are approximately 28.3 grams per ounce. According tothe United States Food & Drug Administration, the recommendeddaily requirement of protein is 44g for adult women. How manyounces of protein is this?
6. Alanine is an amino acid with the following molecularformula: C3H7NO2. You are going toattach 10 alanine molecules to each other by peptide bonds. What isthe molecular formula for the molecule that is made by attaching 10alanine amino acids together in this way?
6.
Diamonds have a density of 3.52 g/mL. What is the volume of adiamond with a mass of 15.1 g?
Answer
4.29 cm3 | ||
0.233 cm3 | ||
63 cm3 | ||
4.9 cm3 | ||
53 cm3 7. A serving of fish contains 50g protein and 4 g offat. If protein has a caloric value of 4 KCal / g and fat has 9KCal / g, how many KCal are in the serving? KCal =kilocalories. |