A metal melts at 450 degrees celsius. Is this property of the metal classified as chemical or physical?

The burning of a sample of propane generated 104.6 kJ of heat. All of this heat was use to heat 500.0 g of water that had an initial temperature of 20.0/C. What was the final temperature of the water? (70.0/C)

Calculate the percent activity of the radioactive isotope strontium-89 remaining after 5 half-lives.

mr lee owns a toystore. he orders 20 toys consisting of airplanes cars and trains. the number of airplanes is 2,3

Al (OH) 3 + 3 HCl = AlCl3 + 3 H2O Some brands of antacid tablets have used aluminum hydroxide to neutralize excess acid, as shown above. How many grams of HCl can a tablet with 0.880 g of Al (OH) 3 consume? How much h2O?

How many grams of H₂ are produced with the reaction of 36 grams of water? 2 Na + 2 H20 - > 2 NaOH + h2

To breed or train; to tame a wild animal to live with humans.

Why the noble gases tend not to react

Which one is a true statement about exothermic reactions? a. energy from an outside source is continuously being added. b. the reaction container always feels cold. c. the reactants have more heat energy than the products. d.

How does adding energy to a solid affect the motion of the particles

Which statement best describes control rods? They are unmovable pieces. They are inert. They supply neutrons to start the nuclear chain reaction. They drive the generator