3. Which is the minimum amount of energy required to start a chemical reaction?

A endothermic energy

B chemical energy

C activation energy

OD exothermic energy

Describe what a polar covalent bond is and name a common compound that has a polar covalent bond holding it together

How is natural selection different from evolution

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory? A. two mud balls sticking to each other OB. a baseball hitting the ground and rolling to a stop C.

A certain first-order reaction (A→products) has a rate constant of 9.00*10-3 s-1 at 45 ∘C. How many minutes does it take for the concentration of the reactant, [A], to drop to 6.25% of the original concentration?

What is the full name for an atom with 20 protons and 14 neutrons?

A banana split contains 1.12 million calories. What is the energy value in kilojoules? a. 1.12 kJ b. 4.686 x 10^3 kJ c. 4686 kJ d. 2.68 x 10^5 kJ e. 268 kJ

2 grams of a substance was dissolved in 75.0 g of water resulting in a temperature decrease from 23.1 ⁰C to 18.7 ⁰C. The specific heat of the solution is 4.18 J/g·⁰C. Calculate the amount of heat associated with the water.

Why do you think the soccer ball fell more slowly than the golf ball

Which of the following is an example of chemistry research in the main area of energy?. a. producing bioplastics. b. specific reactions between prescription drugs and chemicals in cells. c. developing rechargeable batteries. d.

A gas is sealed in a bottle at 25°C and 1.50 atm pressure. How must the storage conditions be changed to bring the gas to Standard Temperature and Pressure (STP) ? A. Increase the temperature by 25°C and decrease the pressure by 0.514 atm. B.