Jane and Mark make an H-R diagram and conclude that the Sun is the brightest and hottest star within 20 light years of Earth. Do you agree with their claim? Why or why not?

Why is water considered a universal solvent

A 1.0 M H2S solution has a pH = 3.75 at equilibrium. What is the value of Ka? A. 3.16 * 10-21 B. 3.16 * 10-8 C. 8.89 * 10-5 D. 8.89 * 10-8

Which of the following results when iron and oxygen react? 1. fe2o3 corrodes 2. hydrated iron forms 3. iron oxide forms 4. a shiny metal forms 5. o2 dissolves in water

Which of the following is type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one?. a. ionic bonding. b. metallic bonding. c. covalent bonding. d. hydrogen bonding

A block has a mass of 20g and measures 2cm*4cm*2cm, will it sink or float?

Constance is making a vegetable soup that contains carrots, beans, water, salt, pepper, bits of ham, and onions. the soup has to cook for 4 hours. while the soup is cooking, what will happen to some of the minerals that are in its ingredients?

Which of the following form solid solutions? Select all that apply. naturally occurring minerals gases present in air HCl and water sugar and water metal alloys

Alan's go-kart travels 1750 feet per minute, and Barry's go-kart travels 21 miles perhour. Who's go-kart travels faster?

What needs to happen for a solute to dissolve in a particular solvent? A) the attractions between the solute and solvent molecules must be greater than the attractions keeping the solute together and the attractions keeping the solvent together.

Which is a conversion factor for this statement of equality: 12 in. = 1 foot? 12 feet1 in. 12 feet 1 in. 1 in. 12 feet 1 in. 12 feet 1 foot12 in. 1 foot 12 in. 1 foot1 in. 1 foot 1 in.