University:
Arizona State University
Course:
CHM 101 | Introductory Chemistry
Academic year:

2022
Views:

472

Pages:

5
Author:

Leilani Contreras

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, MgCl 2. 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, C3H7NO3. Determine the molar mass of calcium hydrogen sulfate, Ca(HSO4)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, CH2O? 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, Li3PO4, are there in 7.9 × 1023 formula units of this compound? 2. How many carbon atoms are there in 0.73 mol of acetic acid, C2H4O2? 3. What is the mass of 2.2 mol of sulfur hexachloride, SCl6? 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?