Which of the following would not necessarily indicate a chemical reaction?

change in temperature

chemical precipitation of a solid

production of a gas

change in volume

When does carbon dioxide absorb the most heat energy? A) during freezing B) during deposition C) during sublimation D) during condensation

What is a solution A heterogeneous mixture A mixture of elements A homogeneous mixture A mixture of two liquids

Which of the following is not the same as 0.953 kilograms? 953 g 953,000 mg 9530 cg

Sucrose is a non volatile, non-ionizing solute in water. Determine the vapor pressure lowering, at 27 degrees Celsius, of a solution of 75.0 grams sucrose, C12H22O11 dissolved in 180 grams of water.

Compaction is most significant as a lithification process for sedimentary rocks composed of sand-sized particles. True False

When bases dissolve in water they release what type of negative ion?

An acid is added to water, and a new equilibrium is established. What is the system after the acid is added?

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm? A. 7.7 degrees B. 16.6 degrees C. 6.

g write net ionic equations for the reactions of h2po4 - an amphiprotic ion with aqueous solutions of hcl koh

Eagles use sharp talons to grab fish from the water. What characteristic of life is this most directly an example of?