Which pair of elements are the most similar? A. Ca and F B. Na and Cl C. Ne and Ar D. K and Ca

The rate of evaporation is affected by all of the following except A. the type of solid evaporating. B. the area of the surface. C. the humidity. D. the temperature.

4. How many grams of each element would be present in a 1 Liter (1050g) bottle of pure vinegar (acetic acid) ?

How are atoms grouped on the periodic table

10.0 ml of 1.00 M HCl neutralized 20.0 ml of a NaOH solution. What was the molarity of the NaOH?

For each scenario, determine if the electron has absorbed energy or emitted energy, An electron jumps from n = 3 to n = 1. An electron jumps from n = 2 to n = 3. An electron jumps from n = 1 to n = 2. An electron jumps from n = 3 to n = 2.

A 0.239 gram sample of a gas in a 100-mL flask exerts a pressure of 603 mm Hg at 14 degrees Celsius. What is the gas?

Which of the following is true about a redox reaction? In a redox reaction, an electron is lost by the reducing agent. In a redox reaction an electron is lost by the oxidizing agent.

Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

What characteristics do atoms of carbon-12, carbon-13, and carbon-14 have in common?

Which of the following changes would decrease the rate at which a solid solute dissolves in a liquid solvent? A. Decreasing pressure B. Decreasing surface area C. Increasing rate of stirring D. Increasing temperature