What is required for electricity to flow? Explain.

What does the enthalpy of reaction measure? O A. The amount of energy required to raise the temperature of a substance O B. The amount of energy required to make a chemical reaction happen O c.

What is a potential benefit of fuel cell cars? increased efficiency converting gasoline to energy no recharging necessary decreased automobile cost larger engines

Albert Einstein changed the way we think about gravity by using the results of many new experiments to explain that giant objects like Earth bend the space around them.

Which term defines an acid? A) proton donor B) electron donor C) neutron acceptor D) proton acceptor

Why does an evaporating liquid cool down according to the Kinetic Molecular Theory?

A) the ka for acetic acid (h3cco2h) is 1.737 * 10-5. what is the pka for this acid? b. use the pka calculated above to determine the ph at which [h3cco2h]=[h3cco2-].

Suppose you take a piece of hard wax from an unlit candle. After you roll the wax between your fingers for a while, it becomes soft. What State of matter is the softer wax? Is it possible for wax to change without changing state

Prevailing winds peru

Foods labeled "fat free" can actually contain less than 0.5 grams of fat.

Plants make their own food. The chemical reaction for this process is shown in the equation below. CO2 + H2O + energy → C6H1206 + O2 What are the products in this chemical reaction? O A. C6H1206 + energy O B. H20 + energy O C. CoH1206+02 O D.