Which of the following statements is most accurate?

a. warm air sinks.

b. warm air is less dense than cold air.

c. warm air is denser than cold air.

d. warm air exerts more pressure on the land than cold air.

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.

Which beat describes the brain stem