BIS 2A Lecture Notes - Lecture 2: Cengage Learning, N-Nitrosodimethylamine, Molar Mass
4 Jul 2018
School
Department
Course
Professor
Mole Problems with Neon Marker Fun
Directions: Complete the following problems using the neon markers with your lab group. As you complete
them, post pictures of your solutions (with all the work) to the shared Google Drive folder. Remember to
number your handiwork, so we all know which question you are posting.
1. The molecular formula of acetylsalicylic acid (aspirin), one of the most commonly used pain relievers, is
C9H8O4, with the molecular structure shown below
a. Calculate the molar mass of aspirin.
b. A typical aspirin tablet contains 500.0 mg of C9H8O4.
What amount (moles) of C9H8O4 molecules are in a
500.0 mg tablet?
c. To help lower the risk of heart attack in patients with
heart disease, some doctors recommend their patients
take 81 mg of aspirin daily. What number of acetylsalicylic acid molecules are
in a Low Dose Bayer tablet with 81 mg of aspirin?
2. Bauxite, the principal ore used in the production of aluminum, has a molecular formula of Al2O32 H2O.
The “ H2O” in the formula are called waters of hydration. Each formula unit of the compound contains
two water molecules.
a. What is the molar mass of bauxite?
b. What is the mass (grams) of aluminum in 0.58 mole of bauxite?
c. How many atoms of aluminum are in 0.58 mole of bauxite?
d. What is the mass (grams) of formula units of bauxite?
3. Ascorbic acid, or vitamin C (C6H8O6), is an essential vitamin. It cannot
be stored by the body and must be present in the diet. The molecular
structure is shown below.
a. What is the molar mass of ascorbic acid?
b. Vitamin C tablets are taken as a dietary supplement. If a typical tablet
contains 500.0 mg of vitamin C, what amount of moles of vitamin C
does it contain?
c. How many molecules of vitamin C are in a 500.0 mg tablet?
4. Dimethylnitrosamine, (CH3)2N2O, is a carcinogenic (cancer-causing) substance that may be formed in
foods, beverages, or gastric juices from the reaction of nitrite ion (used as a food preservative) with
other substances.
a. What is the molar mass of dimethylnitrosamine?
b. How many moles of (CH3)2N2O molecules are
present in 250.0 mg of dimethylnitrosamine?
c. What is the mass of 0.050 mole of
dimethylnitrosamine?
d. How many atoms of hydrogen are in 1.0 mole of
dimethylnitrosamine?
e. What is the mass of molecules of
dimethylnitrosamine?
f. What is the mass in grams of one molecule of dimethylnitrosamine?
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Directions: complete the following problems using the neon markers with your lab group. As you complete them, post pictures of your solutions (with all the work) to the shared google drive folder. Remember to number your handiwork, so we all know which question you are posting: the molecular formula of acetylsalicylic acid (aspirin), one of the most commonly used pain relievers, is. C9h8o4, with the molecular structure shown below a. b. c. A typical aspirin tablet contains 500. 0 mg of c9h8o4. What amount (moles) of c9h8o4 molecules are in a. To help lower the risk of heart attack in patients with heart disease, some doctors recommend their patients take 81 mg of aspirin daily. What number of acetylsalicylic acid molecules are in a low dose bayer tablet with 81 mg of aspirin: bauxite, the principal ore used in the production of aluminum, has a molecular formula of al2o32 h2o. The h2o in the formula are called waters of hydration.
