When electricity passes through a gas it may become hot enough to give off light how could scientist determine the element from which gas is made

To make salt water a heterogeneous mixture, you would have to

How many atoms are in each elemental sample? Express your answer using two significant figures. A. 4.8 mol Cu B. 5.6x10^-3 mol C C. 20.0 mol Hg D. 0.285 mol Na

All formulas of mole concept

Humans have the ability to change characteristics, or traits, of organism over time. What is this process called?

Match the following with their correct molecular weight. 2-butanone Propyl acetate 4-methyl-2-pentanone Butyl acetate Methanol Ethanol A. 46.07 g/mol B. 116.16 g/mol C. 102.13 g/mol D. 100.16 g/mol E. 32.04 g/mol F. 72.11 g/mol

Two examples of common items that use chemical change

Give two sources of energy that can cause ocean waves

Chromium, calcium, and potassium are near each other on the periodic table and have some common characteristics but differ in chemical reactivity.

Which is true of transition metals when moving from left to right on the periodic table? The d sublevels are not filled across the period. The cation radii become larger across the period. Atomic radii increase slightly and then start to decrease.

How many hydrogen atoms are present in a hydrocarbon chain of five carbon atoms with one double bond and the rest single bonds?