5. Which statement is NOT true?

a. Light travels with or without a medium.

b. Sound must have a medium to travel through.

c. Both light and sound must have a medium to travel through.

d. Light travels faster than sound.

What is the function of the Artificial light source of the microscope?

Hydrazine (N2H4) and dinitrogen tetroxide (N2O4) form a self-igniting mixture that has been used as a rocket propellant. The reaction products are N2 and H2O. 1. Write a balanced chemical equation for this reaction. 2.

Doesn't hydrogen have one energy level assuming that we only have one electron and not an ion?

How many grams of dry NH4Cl need to be added to 2.10L of a 0.700M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.59? Kb for ammonia is 1.8*10-5.

Based on what you have now learned about biochemistry, predict which one of the three types of carbohydrates (monosaccharide, disaccharide, or polysaccharide) would have more energy stored in its structure

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.