In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?

A.

chromatography

B.

distillation

C.

filtration

D.

condensation

Liquid Sample A has a higher vapor pressure than liquid Sample B (both in closed containers). What can be said about Sample A compared with Sample B? a. The liquid in Sample A vaporizes more easily than in Sample B. b.

eview the equation below. 2KClO3 2KCl + 3O2 How many moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose?

An ideal gas sample with 7.20 atm pressure occupies 250mL voulme at 18•C. What volume would it occupy at 1.50atm and 216•C?

Which type of protein penatrates the plasma membrane but does not go all the way through it?

2. A solution of potassium cyanide, KCN, is made by dissolving 3.2 g of KCN in water. When this solution reacts with excess hydrochloric acid, HCl, it produces 0.30 g of poisonous hydrogen cyanide gas, HCN.

Type in the correct number for each question in the text box provided. Consider the synthesis of one molecule of glucose.

The production of ammonia (NH3) is exothermic and is in equilibrium with its breakdown (which is endothermic): N₂ + 3H₂ ⇋ 2NH₃ If the concentration of H2 is decreased, will the equilibrium shift to produce more or less ammonia? Justify your answer.

Modern scientists use a version of the metric system called

How many protons does an atom of Iodine (I), #53, have if it has an atomic mass of 127?

Which pH range is more acidic than most freshwater lakes, streams, and ponds? A. 3 to 5 B. 6 to 8 C. 10 to 12 D. 12 to 14