Why are allergic reactions often

referred to as inappropriate

responses of the immune system?

If lye, NaOH (s), is put in water, the solution gets hot. What kind of energy process is this?

6800 6809 Answer these problems with correct sig dig. SHOW YOUR WORK! 32. A piece of copper is placed in a beaker containing 68.56 ml water. The total volume a beaker containing 68.56 ml water. The total volume of the water increases to 232 ml.

WILL How does one determine a percent composition from an empirical formula?

A measurement gave a mass of. 34kg. This is the same as 340g

A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equation to determine the mass of NaCl that reacted with F2 at 280. K and 1.50 atm

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal