8. Calculate the molar mass of an alkane with the mole-

cular formula C H18.

for any substance solid liquid or gas mass increases as volume increases because density represnets mass per volume

What characteristic of an atom determines its properties? Question options: A. The atomic number of neutrons b. The atomic mass c. The arrangement of electrons around the nucleus d. Arrangement of protons in the nucleus

Convection of Heat occurs in what type (s) of matter? (Solid, Liquid, or Gas)

Rank the following elements in order of decreasing atomic radius. Rank from largest to smallest radius. Si, Mg, Na, Al

Explain how the atomic number of an element identifies the element

Hydrogen is 99% hydrogen-1; 0.8% hydrogen-2; and 0.2% hydrogen-3. calculate it's average atomic mass

Uranium-235 has a half-life of 713 million years. Would uranium-235 or carbon-14 be more useful for dating a fossil from Precambrian Time? Explain.

Earth's oceans contain many dissolved elements like calcium, sodium, and chlorine. These elements plus several others combine to form the salts in the oceans.

What is physical change in chemistry?

Testable question: does the water need to be hot or cold to make a cloud. What data can I use for my science project