You observe heat, light, and sound released by a chemical reaction. this reaction is

absorbing energy

consuming energy

exothermic

endothermic

In a calcium atom in the ground state, the electrons that possess the least amount of energy are located in the (1) first electron shell (2) second electron shell (3) third electron shell (4) fourth electron shell

The red lionfish (shown below) is a voracious predator of small fish, including young angelfish and parrotfish. In the Caribbean, red lionfish have no natural predators.

What is the correct order of processes in the accretion of planetesimals?

A chemist requires 0.811 mol Na2CO3 for a reaction. How many grams does this correspond to?

In a laboratory experiment, Rashida observed water as it vaporized, froze, melted, and condensed. Which of the following is a valid conclusion? a. She observed different changes of state. b. All of the changes required energy to be absorbed. c.

what combination will result in a acidic solution? a reaction of strong acid and strong base b reaction of strong acid and weak base c a reaction of weak acid and strong base d reaction of weak acid and weak base

How many moles of sucrose (C12 H12 O11) would be in 7.1 liters of a 0.93 molarity solution of sucrose?

If the temperature is constant what change in volume would cause the pressure of an enclosed gas to increase by a factor of 4

For the reaction of carbon with carbon dioxide to make carbon monoxide, one set of conditions produced a Kc = 1.2 * 10-1. At equilibrium at a certain temperature, the concentration of product was 0.60 M.

Water is a colorless and odorless liquid. It can exist in solid, liquid, and gas states. It boils at 100 degrees C and melts at 0 degrees C. Which option best describes this information? A. These are the physical properties of water. B.