rosarioyoung3
Answered

Welcome to Westonci.ca, where your questions are met with accurate answers from a community of experts and enthusiasts. Explore our Q&A platform to find reliable answers from a wide range of experts in different fields. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

7. Dry air is about 20.95% oxygen by volume. Assuming STP, how many oxygen molecules are
in a 63.0 Liter sample of air?


8. 150 grams of a hydrocarbon contains 125.4 grams carbon and the rest hydrogen. It has a
gram formula mass of 86.2 g/mol.
a. Determine the empirical formula of the compound
b. Determine the molecular formula of the compound


9. Hessite is a mineral form of silver telluride having the chemical formula of Ag2Te.
a. How many grams of silver can be extracted from 1.85 kg of Ag2Te? 1 kg = 1,000 grams
b. How many atoms of silver can be extracted?
c. b. If the current price of silver is $0.80 per gram, what is the total value, in dollars, of silver
extracted from 1.85 kg of Hessite?

Sagot :

We hope you found this helpful. Feel free to come back anytime for more accurate answers and updated information. We hope our answers were useful. Return anytime for more information and answers to any other questions you have. Thank you for trusting Westonci.ca. Don't forget to revisit us for more accurate and insightful answers.