5 Questions
How many moles of carbon dioxide are produced by the complete combustion of 7.0 g of ethene, $C_2H_4$ (g)?
0.5
Which is a possible empirical formula for a substance with Mr = 42?
CH
Which quantities are different between two species represented by the notation $({52}^{128})Te$ and $({53}^{128})I^-$?
The number of protons and neutrons only
What is the relative atomic mass of a sample of chlorine containing 70 % of the $^{35}Cl$ isotope and 30 % of the $^{37}Cl$ isotope?
35.5
Which molecule is polar?
PH3
Test your chemistry knowledge with this quiz. Answer questions on moles, gas state changes, combustion, and empirical formulas. See how well you understand these fundamental concepts in chemistry.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
