University:
Augusta University
Course:
CHEM 1441 | General Chemistry
Academic year:

2019
Views:

375

Pages:

5
Author:

D Robbins

Mole & Molar Mass Worksheet Answer the following questions on a separate piece of paper. Level 1 1. What is the atomic mass of a. an atom of aluminum? _________ b. an atom of carbon? _________ 2. What is the mass of a. one mole of aluminum atoms? _________ b. one mole of carbon atoms? _________ 3. What do 1 mol of aluminum and 1 mol of carbon have in common? 4. Give three examples of what the word particles could represent. 5. Answer the following questions, showing all units and steps: a. Bananas cost $1.19/kg. How many kilograms of bananas can be purchased with $5.00? b. A vehicle is travelling at 32 km/h. How far does it travel in 12 min? c. Determine the number of particles in 2.0 mol of carbon. 6. A sample has 2.3 mol of magnesium chloride, MgCl2 . a. How many molecules are in the sample? b. How many atoms are in the sample? Level 2 1. 2. 3. 4. 5. What is the molar mass of plutonium? What is the mass of a plutonium atom? Determine the molar mass of isopropyl nitrate, C3H7NO3. Determine the molar mass of calcium hydrogen sulfate, Ca(HSO4)2. Determine the molar mass for each compound. a. calcium chloride b. mercury(II) fluoride c. sodium oxide Level 3 1. 2. 3. 4. How many molecules are present in 2.30 mol of formaldehyde, CH2O? Calculate the number of atoms of each type given in the previous question. What amount in moles is 10.0 g of tin(IV) nitrate, Sn(NO3 )4? What is the mass of 0.763 mol of nitric acid, HNO3 ? Level 4 1. How many moles of lithium phosphate, Li3PO4, are there in 7.9 × 1023 formula units of this compound? 2. How many carbon atoms are there in 0.73 mol of acetic acid, C2H4O2? 3. What is the mass of 2.2 mol of sulfur hexachloride, SCl6? 4. What is the mass of 4.20 × 1023  molecules of SCl6 ? 5. How many atoms are present in 10.5 kg of ammonia, NH3 ?