Which pair of species have the most nearly

identical atomic and molecular properties?

1. 35/17Cl and 80/35Br

2. 7/3Li and 9/4Be

3. 23/11Na and 23/11Na+

4. 19/9F and 19/9F-

5. 12/6C and 13/6C

A Cadillac Escalade has a mass of 2 569.6 kg, if it accelerates at 4.65m/s2 what is the net force on the car?

If a student analyzes data and finds that they got 0.480 moles of an unknown metal and 0.240 moles of oxygen, what is the mole ratio of metal to oxygen?

The meniscus of mercury in a glass capillary tube is convex because of A) the very high density of mercury as compared with water. B) the low surface tension of mercury C) the greater attraction of mercury atoms to the glass than to each other.

What would the mass of 7 red apples be in kilograms?

Which statement best explains water's ability to dissolve covalent compounds? a. Water can dissolve polar covalent compounds through dipole-dipole interactions. b. Water can dissolve nonpolar covalent compounds through hydrogen-bonding interactions.

Which formula correctly represents the product of an addition reaction between ethene and chlorine?

Compare gases with liquids and solids according to the kinetic molecular theory

4Cr (s) + 3O2 (g) = Cr2O3 (s) Find the theoretical yield in moles and grams

Which isotope is used to date ancient artifacts such as fossils?

Bromine + calcium iodide  calcium bromide + iodine