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- 1. Multiple ChoiceThe molar mass of an element is equal to its...Atomic massAtomic numberOxidation numberValence electrons
- 2. Multiple ChoiceThe mass of one mole of substance is called...molecular massmole constantmolar massatomic weight
- 3. Multiple Choice
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula SiO2. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as synthetic product. What is the formula mass of the covalent compound silicon dioxide (SiO2)?
7193.6 amu
30.0 amu
44.1 amu
60.1 amu
- 4. Multiple Choice
Fluorine is added to city water supplies in the proportion of about one part per million to help prevent tooth decay. Several fluoride compounds are added to toothpaste, also to help prevent tooth decay. What is the molar mass of fluorine gas?
18.998 amu
38 amu
9 amu
18 amu
- 5. Multiple ChoiceWhat is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- 6. Multiple Choice
Sodium hydroxide is used in many industries: in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents, and as a drain cleaner. What is the molar mass of NaOH?
40 amu
38.989 amu
23.998 amu
57.004 amu
- 7. Multiple ChoiceWhat is the mass of one mole of aluminum chloride (remember to determine the correct formula first)?62.435g116.399g133.341g97.888g
- 8. Multiple ChoiceWhat is the molar mass of CO2?12163244
- 9. Multiple Choice
Potassium sulfide is the inorganic compound with the formula K2S. Potassium sulfides are formed when black powder is burned and are important intermediates in many pyrotechnic effects, such as senko hanabi and some glitter formulations. What is the molar mass of K2S?
110.3 amu
110 amu
78.2 amu
110.2 amu
- 10. Multiple Choice
What is the molar mass of Cs2SO4 ?
361.9
361.8
313.9
180
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