Compared to a 26-gram sample of NaCl (s) at STP, a 52-gram sample of NaCl (s) at STP has (1) a different density (2) a different gram-formula mass (3) the same chemical properties (4) the same volume

A manufacturer of bicycles has 4250 wheels, 2755 frames and 2255 handlebars. How many bicycles can be manufactured using these parts? a. 2125 complete bicycles b. 2255 complete bicycles c. 2755 complete bicycles d. 4250 complete bicycles e.

How many neutrons are in an isotope of nitrogen-16? A. 14 B. 9 C. 10 D. 7

A 1,000 g ball and a 100 g ball are dropped from a tower. Both balls are the same size and there is no air resistance. Which one hits the ground first? The 1,000 g mass hits the ground first. They both hit the ground at the same time.

Discuss the functions of a thermo flask in terms of conduction, convection, and radiation. what improvements would you add to a modern day thermo flask?

Ammonia, NH3, can be made by reacting nitrogen and hydrogen and the equation is N2 + 3H2 - - > 2NH3 How many moles of NH3 can be made if 9 moles of H2 react with enough N2? mol

Which types of orbitals are found in the principal energy level n = 4? A. S, d B. S, p, d, f C. S, p D. S, p, f E. S, d, f

Transport means to move something from one place to another. True False

What are two reasons that ocean water sinks in the Arctic Ocean? A. The surface water is warmer and less salty than normal. B. The surface water is warmer and more salty than normal. C. The surface water is colder and less salty than normal. D.

Which statement best describes the conductivity of weak electrolytes, such as weak acids and bases? A) Weak electrolytes do not dissolve in water and can not conduct electricity.

Two speakers are placed side by side and are described as having constructive interference. How do you know when constructive interference of sound waves has occurred?