Which is a sign of chemical change?

A. chocolate syrup dissolve in milk

B. folding paper changes the size

C. toast smells different than bread

The charge of an electron is a. - 2. c. 0. b. - 1. d. 1.

What is the electron configuration of a chlorine ion in a compound of BeCl2

When calculating energy changes for substances other than water, how do we account for the differences in their abilities to absorb or release heat?

Complex carbohydrates: are long chains of sugar units arranged to form starch or fiber. are known as the monosaccharides and disaccharides. are small molecules containing six carbon atoms. contain calcium, hydrogen, and nitrogen.

Select the correct answer. How does an atom become a positively charged ion? A. By gaining one or more electrons B. By gaining one or more neutrons C. By losing one or more electrons D. By losing one or more neutrons

Which one of the following Acids is most likely to hurt you? Acid A: 1.0 M; Acid B: 0.0001M

Which statement accurately describes the atoms of a specific element? explain your answer in complete sentences. A. A Neon, Ne, atom contains 10 electrons outside the nucleus and 11 neutrons inside the nucleus. OR B.

What is the volume of 2.00 moles of chlorine (cl2) gas at stp, to the nearest tenth of a liter?

A reaction of 12.640 g of copper oxide with 0.316 g hydrogen produces 2.844 g of water and Xg of copper. X=_9

If i burn steel wool inside a closed jar or bottle will the oxygen be completly gone