Which element has chemical properties that are most similar to those of calcium?

(1) Co (3) N

(2) K (4) Sr

Which of the following sets contains a substance that could not be used as an acid base indicator?

The largest ruby in the world has a volume of 575 cm3and a density of 3.97 g/cm3. What is the mass of the ruby?

Which of the following does not participate in, nor is a component of, the electron transport chain? (Remember that molecules can have more than one name) Coenzyme A Non-heme, iron sulfur proteins Coenzyme Q Cytochrome c1 NADH.

Which direct measurement would provide evidence that the energy of a substance had changed? A. Temperature B. Heat C. Mass D. Volume

One commonly used precise way to describe the _ of solutions is to state the percentage by volume of the solute

What is a example of a population

Which of the following statements holds true for a chemical change? OA In a chemical change, no new substance is formed. B. In a chemical change, a substance changes its phase. oc. In a chemical change, the molecular structure of a substance changes.

What is the name of the branch of science that specifically studies the conversion of chemical energy to electrical energy and vice versa? biochemistry electrochemistry organic chemistry thermodynamics

What is the symbol for heat

When a single 1-gram piece of zinc is added to 3 M hydrochloric acid at 25°C, the reaction is slow. Which procedure would most likely increase the rate of the reaction if the reaction were repeated? A. using 1 gram of powdered zinc B.