What is the mass % of carbon in CO2 ?

Paying attention in lecture question! In Lecture Quiz #2, we explored the property of density by examining a clip from Indiana Jones and the Raiders of the Lost Ark.  In the clip, Indy tries to steal a gold statue by replacing it on a pedestal with another object.  What was this object?

What is the minimum amount of time a professor must spend grading for the time to fall in the top 10% of all exam grading times?

Bronze is a metal alloy composed of copper and tin. It is uniform in composition, but the percentage of each metal may very between samples.  Bronze can best be classified as:

How many oxygen atoms are there in 2.74 g of Al2(SO4)3?

A compound that is composed entirely of carbon, hydrogen, and oxygen contains 70.6% C, 5.9% H, and 23.5% O by mass. The molecular weight of the compound is 136 amu. What is the molecular formula?

How many protons, neutrons, and electrons are there in one ion of  77Se2- ?

Which of the following compounds exhibits pure (nonpolar) covalent bonding?

The shortest player in NBA history, Muggsy Bogues, stood 5 feet, 3 inches tall.  How many carbon atoms would you need to stack on top of each other in order to reach this height? (The diameter of a carbon atom is 67 pm, 1 ft = 12 in, 1 in = 0.0254 m).

What is the likely chemical formula of the compound formed between zinc and phosphorus?