Which of the following are NOT enclosed by a cell wall.

Select one:

a. cells of algae

b. cells from a flower stem

c. E coli bacteria cells

d. cells from a dog's paw

How many moles of glucose are contained in 8.3 x 10^21 molecules of glucose

Which statement is usually true about the relationship between activation energy and reaction rates? A) Low activation energy barriers result in low rates. B) High activation energy barriers result in low rates.

Why was the constitution made? who wrote it and what compromises did people clime to?

How many atoms are in 20 moles of carbon

Chlorine has two isotopes, 35Cl and 37Cl that have the respective percent abundance's of 75.77% and 24.23% and masses of 34.9688 amu and 36.9659 amu. Calculate the atomic weight of chlorine.

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