What are the approximate temperature ranges for low, medium, and high temperature refrigeration applications

The protons of an atom are A. negatively charged and located inside the nucleus. B. positively charged and located inside the nucleus. C. negatively charged and located outside the nucleus. D. positively charged and located outside the nucleus.

Compare the properties of the following: α particles, cathode rays, protons, neutrons, and electrons.

Which equation represents an incorrectly balanced chemical equation? Na2CO3 (s) →Na2O (s) + CO2 (g) 4Al (s) + 3O2 (g) →2Al2O3 (s) Zn (s) + 2HCl (aq) →ZnCl2 (aq) + H2 (g) 2ZnS (s) + 2HCl (aq) →4ZnCl2 (aq) + H2S (g)

When molten rock undergoes crytalization above ground what happens.?

How many molecules are in 23 Moles of oxygen o2

Convert: 65 kg to mg 65,000 mg O 65,000,000 mg O 65 mg

F. How many representative particles are in 6.78 moles of sucrose C12H22011?

The ratio of the lengths of two sides of a right triangle forms a

What element is used in making thermometers

How many dots are shown in the electron dot diagram for calcium, in group II and period 4 with 20 protons and 20 electrons? a. four c. eight b. two d. twenty