How many molecules are in 4.0 mol h20

Cold packs are often used to prevent swelling of certain athletic injuries. The pack contains ammonium nitrate and water in separate compartments.

A scientist is investigating the properties of two different biological membranes that have different amounts of cholesterol in them.

Bubba falls out of a plane flying over his peanut field. What will be bubba speed after falling for 8 seconds?

For the reaction 2k (s) + br2 (l) →2kbr (s) calculate how many grams of the product form when 21.4 g of br2 completely reacts. assume that there is more than enough of the other reactant.

Which of the following is made of matter? a. the sun b. light c. heat d. energy

Which the following atoms will not react with water? a. K b. Li c. Pb d. Na

Fluorin is often added to drinking water and toothpaste

What larger energy does light energy come from?

Allows water to pass through easily

Which is a cause of desertification? A. farming B. creating reservoirs C. overgrazing D. driving motor vehicles