Which of the following properties increases down the periodic table? a. number of valence electrons b. electronegativity c. atomic radius d. ionization energy

Put these processes of the water cycle in the correct order, starting at the point where the water is in the lake: 1. water evaporates into the atmosphere 2. rain, snow, or other precipitation falls 3. water collects into larger bodies of water 4. water vapor condenses into liquid water

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?