Which is an example of chemical change

A. mixing of posted colors

B. formation of clouds

C. sugar dissolving in water

D. separating salt from seawater

Why is hydrogen placed with the elements in group 1a?

A triple bond is a bond between two atoms where six electrons are shared between them. True or False

The "hardness" of water is usually expressed as parts per million (ppm) by mass of caco3. what is the molar concentration of ca+2 ions in a water sample with a hardness count of 175 ppm?

What problems can arise if plants and animals are transferred from their natural communities? Select all that apply. overpopulation disease wiping out habitats extinction by not mating unbalanced trophic levels

Describe, on a molecular level, how you would expect these lipids to behave in water.

What solution can you add to of the mixture of NH4 (aq) and Ca2 (aq) to precipitate one cation while keeping the other cation in solution?

Which substance was developed by chemists

Pure gold is defined as having 24 carats. When mixed in an alloy, the carats of gold are given as a percentage of this value. For example, a piece of jewelry made with 50% gold has 12 carats.

If you have 8.56 g of H2, how many grams of NH3 can be produced?

A flask contains 0.83molof neon gas at a temperature of 35°C. The pressure gauge indicates 0.37atm inside the flask. What is the volume of the neon gas?