Which of these is true of a chemical reaction

a. Energy is either released or absorbed.

b. Energy is always absorbed.

c. Energy is always released.

d. Energy is not transferred.

How can the particles and gases from a volcanic eruption affect the temperature of an ecosystem? A. Temperatures would fluctuate. B. Temperatures would fall. C. Temperatures would stay the same. D. Temperatures would rise.

A 110. ml solution of 0.340 m hcl (aq) is mixed with a solution of 330. ml of 0.150 m hno3 (aq). the solution is then diluted to a final volume of 1.00 l. how many moles of h + are present in the final solution?

A gas sample occupies 350.0 mL at 546 mm Hg. What volume does the gas occupy at 652 mm Hg?

How many moles does the mass quantity 127.4g of AgNO3 have?

During the phase change from solid ice to liquid water, which bonds/forces are being weakened?

You are on an alien planet where the names for substances and the units of measures are very unfamiliar. Nonetheless, you obtain 19 quibs of substance called skvarnick.

How do you know if an element is an ion?

Which gas is not a greenhouse gas, A methane, B Water Vapor, C, Carbon dioxide, D, Nitrogen, E, Ozone

A very small equilibrium constant means ... a. an equal amount of reactants and products c. more products b. more reactants d. system isn't at equilibrium

What is in a banana? give me specifics?!