Which of the following describes an exothermic reaction?

O

A. AHI, reactants = 0

O

B. AHf, reactants = AHf, products

O

C. A He, reactants > AHf, products

O

D. A He, reactants < AH, products

If a 40 kg person is accelerating at m/s^2, then the magnitude of force acting on him or her 400 N? true or false

Gajan mixes the pair of substances below: A. zinc chloride solution and copper B. copper sulfate dilution and zinc C. potassium chloride solution and and magnesium D. magnesium chloride solution and zinc Which of these will react?

A student inflates a balloon for a party inside her house, where the temperature is 23°C. She then takes the balloon outside, where the temperature is 12°C. What most likely will happen to the balloon?

A person's blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balanced equation is 16H + (aq) + 2Cr2O72 - (aq) + C2H5OH (aq) → 4Cr3 + (aq) + 2CO2 (g) + 11H2O (l) If 35.

Why do roads have speed limits rather than velocity limits

What is a cause of polarity in water molecules?

Which is the force of attraction that holds atoms together? A. gravity B. friction C. physical bond D. chemical bond

Chemical bonding ranges from even electron sharing to total electron transfer because Select one: a. atoms on the periodic table have many different electronegativities b. some atoms can make more bonds than other atoms can c.

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

Whats the main difference between a double replacement reaction and a single replacement