A friend is trying to describe a material to you. which of the following is not a description of a physical property of the substance? a. it is red in color. b. it is magnetic. c. when combined with water, it fizzes. d. it melts at 240°c.

If a chlorine atom gains or loses a valence electron, it becomes a charged particle called a/an ___ A. Flourine B. Chloride atom C. Ion D. Neutron

1. All matter is composed of atoms or molecules that have energy of motion, which is also known as and A solar energy 8096 B radiation C kinetic energy D potentialenergy

If the reaction produced 15.5 g CO2, how many grams of heptane were burned?

A 0.52 kg bowl is known to be 35% silver and 64% gold by mass. how many atoms of silver are contained in this bowl

The temperature of a sample of water increases from 30.0 degrees C to 40.0 degrees C as 6540 joules of heat are added. What is the mass of the sample of water?

Number of hydrogen atoms in NaC2HO4

Calculate the pH for an acid that has a [H+] of 5.8 x10^-11 M.

Complete the lewis dot structure for h2co (in which both h atoms are bonded to c).

Do substances have to be cold to freeze?

Which statement is true of the carbon atoms that make up a diamond? A. They can slip past one another slowly. B. They are always vibrating in place. C. They vibrate only when they are heated. D. They are locked in place and do not move at all.