Which sample has more atoms in it? 150.0 g of gold or 10.0 g of lithium.

A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation? The solution contains an indicator that has a pH of 2.7. The solid powder contained hydrogen ions.

Which reaction releases the greatest amount of energy per kilogram of reactants? A) neutron + uranium-235 ➡️ barium-141 + krypton-92 + 3 neutrons B) 2C + H2 ➡️ C2H2 C) C3H8 (g) + 5O2 (g) ➡️ 3CO2 (g) + 4H2O (l) D) NaOH (aq) + HCl (aq) ➡️ NaCl (aq) +

Which best represents a reaction mechanism? A → A A + B→ reactants A + B → = products A + A → = A + A

8. How many moles are in 3.01 X 10^24 of oxygen atoms?

how many moles of magnesium hydroxide are in 15 mL of milk magnesia (density of magnesium hydroxide 2.34g/mL)

Which of the following is an example of potential energy? -none of the above -A person jumping on a trampoline -a book on the shelf -A person running in place

One atom of silicon can properly be combined in a compound with a. three atoms of hydrogen. b. four atoms of calcium. c. two atoms of oxygen. d. one atom of chlorine.

How many carbon atoms are present in a mole of 12C?

What is the formula for copper (II) phosphate? Capitalization and punctuation count. How many atoms of phosphorus are in 7.10 mol of copper (II) phosphate?

What is the formula of barium hydroxide? (chemistry) ?