When 12.4 grams of KBr are dissolved in enough water to create a 170-gram solution, what is the solution's concentration, expressed as a percent by mass?

Are atoms indivisible

Laurie buys four bags of candy with 10 pieces in them, Her Dad gives her 5 more pieces of candy. Laurie wants to give candy to her six friends, How much candy is left over?

After electrolyzing aqueous zinc iodide (ZnI2), what state is iodine in - solid, liquid, or gas?

How are isotopes of the same element alike? different?

What is the final volume in milliliters when 0.967 L of a 32.9 % (m/v) solution is diluted to 21.0 % (m/v) ? Express your answer with the appropriate units.

3. Which net ionic equation describes this reaction? 3Ca (OH) 2 (aq) + 2FeCl3 (aq) → 3CaCl2 (aq) + 2Fe (OH) 3 (s) 3Ca2 + (aq) + 3OH - (aq) + Fe3 + (aq) → Fe (OH) 3 (s) + CaCl2 (aq) Fe3 + (aq) + 3OH - (aq) + 3Ca2 + (aq) → Fe (OH) 3 (s) + 3Ca2 + (aq)

How many moles of methane are produced when 25.1 moles of carbon dioxide gas react with excess hydrogen gas?

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) +

Name the hardest artificial substance known?

Suzzane has type A - blood. Which thpe of blood could she receive in a blood transfusion?