University:
University of North Dakota
Course:
CHEM 121 | General Chemistry I
Academic year:

2023
Views:

493

Pages:

1
Author:

tubasmicroprint

Stoichiometry Quiz 1 Learning Goals Review Learning Goal 1: Students will determine the atomic mass, molecular mass, or formula mass of an element, molecule, or compound. 1. What is the gram molecular mass of 𝐶2 𝐻6 ? 𝐶 → 12.0 9/𝑚𝑜𝑙 × 2 𝐻 → 1.01 6/𝑚𝑜𝑙 × 6 Answer: 30.1 9/mol Learning Goal 2: Students will use stoichiometry to between mass, volume, particles, and moles. 2. How many moles are in 72.6 g of Cu? 72.6𝑔 𝐶𝑢 × 1𝑚𝑜𝑙 63.6𝑔 Answer: 1.14mol Cu Learning Goal 3: Students will use stoichiometry to make a two-step conversion between mass, volume, particles, and moles. 3. What is the volume of 3.72 × 1023 molecules of 𝐻2 𝑂? 1 𝑚𝑜𝑙 3𝐻2 𝑂 22.4𝑑𝑚3 𝐻2 𝑂 3.72 × 10 𝑚𝑜𝑙. 𝐻2 𝑂 × × = 13.8𝑑𝑚3 6.02 × 1023 𝑚𝑜𝑙. 𝐻2 𝑂 1𝑚𝑜𝑙. 𝐻2 𝑂 23