2. Atoms & Elements
Calculating Molar Mass
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Practice this topic
- Multiple Choice
Calculate the molecular weight of C3H5N3O3.
3576views33rank2comments - Multiple Choice
The reaction between nickel metal and hydrochloric acid is not a simple dissolution. The product formed is NiCl2 • 6 H2O (s), nickel (II) chloride hexahydrate, which has exactly 6 waters of hydration in the crystal lattice for every nickel ion. What is the molar mass of nickel (II) chloride hexahydrate, NiCl2 • 6 H2O (s)?
5522views21rank1comments - Multiple Choice
What is the molar mass of diazepam also known as Valium if 0.05570 mol weighs 15.86 g?
4087views24rank1comments - Multiple ChoiceUse the data in the table to calculate the atomic mass of silicon.
Exact Mass and Abundance of 3 Isotopes of Silicon Isotope Isotopic Mass Abundance 28Si 27.97693 amu 92.23% 29Si 28.97649 amu 4.67% 30Si 29.97376 amu 3.10% 1229views - Textbook Question
The ball-and-stick molecular model is a representation of caf-feine. Calculate the molecular weight of caffeine. (Gray = C, red = O, blue = N, ivory = H.) (LO 3.3)
(a) 194.2 (b) 182.2 (c) 192.2 (d) 180.2
626views - Textbook Question
Determine the formula weights of each of the following compounds: (a) Butyric acid, CH3CH2CH2COOH, which is responsible for the rotten smell of spoiled food (b) sodium perborate, NaBO3, a substance used as bleach (c) CF2Cl2, a refrigerant known as Freon (d) NaHCO3, known as baking soda and used in bread and pastry baking (e) isopentyl acetate, CH3CO2C5H11, responsible for the odor of bananas.
652views - Textbook Question
(d) What is the molar mass of cholesterol if 0.00105 mol has a mass of 0.406 g?
1072views - Textbook Question
(d) What is the molar mass of diazepam (Valium®) if 0.05570 mol has a mass of 15.86 g?
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