Determine the number of particles in 1 mole of dust mites.

a. 1.204 x 1024 particles

b. 1.51 x 102 particles

c. 3.01 x 1032 particles

d. 6.022 x 1023 particles

How do you prepare a 250 ml of a 2.35 m hf dilution from a 15.0 m stock solution

Maria is baking cookies. She mixes water, flour, sugar, baking powder, butter and chocolate chips and then measures the mass of her ingredients. The mixture has a mass of 1053 grams.

Which is an example of a chemical change? a cake baking sugar dissolving water boiling butter melting?

For the following questions consider a water molecule, H2O. a. What type of bond is formed between the oxygen and the hydrogen atoms? b. Describe how these bonds form. c. Explain why there are two hydrogen atoms for each oxygen atom.

Identify two different habitats in a marine ecosystem. Name one organism found in each habitat

Describe how food is digested and absorbed

If a solution A has twice as much solute as solution B. Is it possible for the solutions to have the same concentration?

Chris is studying oxidation and reduction reactions. Which of the following could she use as an example of an oxidation reaction?

In a short circuit as the resistance decreases what happens to the current?

Describe the characteristic of chemical structure found at the core of each steroid hormone