Which sample of matter is classified as a solution? 1. H2O (s) 2. H2O (l) 3. CO2 (g) 4. CO2 (aq)

What is allotrope of carbon?

Suppose you wanted to monitor a pH change between 5.3 and 6.3. Which indicator would be most appropriate?

During chemistry lab, Mrs. Black's students placed an antacid tablet in a zip lock bag. They recorded the mass of the tablet in the bag. Then they carefully added 50 grams of water and quickly sealed the bag.

What gas diffuses faster helium or neon?

A 21.5 g piece of iron at 100.0∘C is dropped into 132 g of water at 20.0∘C. What is the final temperature of the system, in degrees Celsius, if the specific heat of iron is 0.449Jg∘C? Round your answer to one decimal place. Use 4.

A sample of hydrogen was collected by water displacement at 23.0°C and an atmospheric pressure of 735 mmHg. Its volume is 568 mL.

What is loamy soil?

What is the lowest possible value of n for a d atomic orbital?

List the following bonds in order of increasing ionic character: CsF, ClCl, BrCl, SiC

Characterize the size of an atom