A sample of a compound contains 60.0 g C and 5.05 g H. Its molar mass is 78.12 g/mol. What is the compound's molecular formula?

Explain how stagnant sulfureted water may greatly accelerate metallic corrosion. (See the Email Link in Moodle) | (7 marks)

A student is determining the density of an unknown metal with a mass of 32.56 g. The student partially fills a graduated cylinder with water and measures the volume of the water by itself as 14.78 mL.

What type of substances make better conductors? A. Substances with greater density. B. Substances with more surface area. C. Substances with less density. D. Substances with less surface area.

43.0 grams of potassium chloride dissolves in 600 mL of water. What is the concentration of the solution?

When an atom releases gamma radiation, A. the mass number decreases by one. B. the atomic number decreases by one. C. the mass number increases by four. D. the atomic number remains the same.

For metallic structures, does the packing efficiency (see sample exercise 12.1 in textbook) increase or decrease as the number of nearest neighbors (the coordination number) decreases?

In which reaction is mass converted to energy by the process of fission?

Watch It! #3 After watching the examples in the video of radiation, list 2 other examples that you come up with on your own.

Tear gas has the composition 40.25% carbon, 6.19% hydrogen, 8.94% oxygen, 44.62% bromine. what is the empirical formula of this compound?

Explain why ships traveling from east to west across the Atlantic take days longer than ships traveling the same distance from west to east.