Which of the following is an example of convection?

a hot object transferring heat to a cooler one

hot air rising and cooler air falling

the rays of the Sun warming the earth

a hot oven warming the air around it

What is meant by the statement "saturated hydrocarbons are relatively inert"?

Explain how the following experimental errors affect the final calculation of the kilocalories per gram for a food item. Be specific as to whether the final value will be higher or lower than if the error had not been made. a.

A liquid's temperature is lowered from 60°C to 10°C. Did the the liquid's vapor pressure increase, decrease, or stay the same during that time?

Which one is a true statement about endothermic reactions? A. I need you from an outside source is continuously being added. B. Reaction container always feels hot. C. The reactants have less heat energy and the products. D.

If 25 mL of each of the liquids in the answer choices below were poured into a 100 mL beaker, which would form the second from the bottom layer? A. sea water - density of 1.024 g/mL B. mineral oil - density of 0.910 g/mL C.

How many electrons in an atom could have these sets of quantum numbers n=7 l=3 ml=-1?

The reaction A+B-> C+D rate=k[A][B]^2 has an initial rate of 0.0810 M/s. What will the initial rate be if [A] is halved and [B] is tripled? What will the initial rate be if [A] is tripled and [B] is halved?

What is the chemical formula for coper (ll) hydroxide?

A 1.50-g sample of hydrated copper (II) sulfate was heated carefully until it had changed completely to anhydrous copper (II) sulfate () with a mass of 0.957 g. Determine the value of x.

The reaction rate between reactants Z and Y is proportional to the cube of [Z]. What is the rate law for this reaction?