Which of the following changes would decrease the rate of a reaction? addition of a catalyst increasing the concentration of reactants decreasing the concentration of products additional heat to an exothermic reaction

Are the following bonds (A) ionic bonds or (B) covalent bonds? 39. O─H 44. N─H 40. N─O 45. Ca─S 41. Na─Cl 46. C─O 42. C─H 47. F─F 43. Mg─Br 48. Ba─F

Which of the following factors could prolong the availability of fossil fuels a. increasing alternative energy sources b. increasing demand for fossil fuels c. reducing alternative energy sources d. making new fossil fuels 2.

What determines that an element is a metal? a. the magnitude of its charge c. when it is a Group A element b. the molecules that it forms d. its position in the periodic table

Which of these is NOT a function of the skin? to protect the body against outside invaders to keep the body at a constant temperature to release chemicals that control blood sugar to allow the body to feel when something is touching it

The pressure of sulfur dioxide (SO2) is 2.27 x 104 Pa. There are 418 moles of this gas in a volume of 57.9 m3. Find the translational rms speed of the sulfur dioxide molecules.

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL

All of the following can be recycled except clothing aluminum cans compact fluorescent bulbs plastic drink bottles

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

When you light a fire place what energy transformation takes place