Which of the following materials is a substance, silver, air, gasoline or staintless steel?

The difference between non-spontaneous and spontaneous reactions is that non-spontaneous reactions: occur faster than spontaneous reactions require outside interference to occur release free energy occur without an input of heat

According to Table I, which equation represents a change resulting in the greatest quantity of energy released? 1. 2C (s) + 2H2 (g) - > C2H4 (g) 2. 2C (s) + 3H2 (g) - > C2H6 (g) 3. N2 (g) + 3H2 (g) - >2NH3 (g) 4. N2 (g) + O2 (g) - > 2NO (g)

Which sample is a pure substance? A. a test tube of zinc oxide B. a container of zinc and oxygen C. a flask of pond water D. a jar of soil

Thomas was comparing the amount of salt dissolved in ocean water to the amount dissolved in water from the great salt lake in Utah. which of earths atmosphere is Thomas interested in?

What are the physical properties of toothpaste

What are the elements with atomic numbers from 58 to 71 in the periodic table called?

Which of these elements elements has an electron configuration of [Kr]5s2

Which of the elements listed is the most abundant extracellular anion?

What is the chemical formula for the chemical magnesium nitride?

Why are parentheses used to write the formula AI (OH) 3