Which of these pairs of elements have the same number of valence electrons?

a. Oxygen and BromineB) Carbon and LeadC) Oxygen and CarbonD) Sodium and Magnesium

A student carried out the electrolysis of a KI solution for a period of 15 minutes. He estimated that 8.5 X 10^-4 moles of OH - were produced. - Write the two half reactions and the net reaction of the electrolysis

A black hole has a tremendous amount of light radiation gravity protostars

Which of the following statements is FALSE? A. For a given gas, the higher the temperature, the faster it will effuse. B. Particles of different masses have different average speeds at a given temperature. C.

Which of the following statements is true about emission spectra? a. Emission spectra form dark lines on a continuous spectrum. b. The wavelengths of the spectrum are characteristic of the element emitting the light. c.

James Dewar invented a special flask to keep liquid oxygen warm Find the Incorrect Word in the sentence and Find the correct word to make the statement true.

If a plane is traveling300 mph how long will it take to travel 1800 miles

How do you get friends

Determine the number of grams of NaCl necessary to make up 100 mL of a 0.10 M solution. 0.017 g 0.58 g 1.7 g 58 g

What causes an increase in the average global temperature?

Which of the following is true regarding nuclear fission and nuclear fusion? A. Both of these processes can provide energy. B. Our sun's heat is an example of both of these processes. C. Both of these processes are equally complex to control. D.