You add two substances together in a sealed bag and a chemical reaction happens. The mass before the reaction was 167 g. What was the mass after the reaction? Why?

How do living and nonliving things interact in the environment?

A neutral atom of silicon-30 contains 14 protons. How many electrons does it have?

The human eye contains a certain protein called rhodopsin that changes shape when it is exposed to light. When rhodopsin absorbs light, part of it undergoes a chemical change. This is how eyes sense the presence of light.

3) Tarnished silver contains Ag2S. The tarnish can be removed by placing silverware in an aluminum pan containing an inert electrolyte Such as NaCl. Explain the electrochemical principle for this procedure.

A cube of plastic 1.2x10^-5 km on a side has a mass of 1.1 g. what is its density in g/cm^3

Formula for hydroselenic acid

The branch of chemistry that is the study of the composition, properties, and reactions of matter is called

According to the article, HOW has the discovery of the Mimivirus influenced scientists' ideas about viruses? А Since it acts differently than other viruses, scientists think it could lead to a vaccine for cancer B.

Consider the two electron arrangements for neutral atoms A and B. Are atoms A and B the same element? A - 1s2, 2s2, 2p6, 3s1 B - 1s2, 2s2, 2p6, 5s1 yes or no

Match the following terms to their correct examples Conduction Convection Radiation Water warming on a stove The sun warming the earth A spoon resting in a cup of tea gets hot