What role does the wire play in voltaic cell?

a) It allows electrons to flow from the anode to the cathode.

b) It allows migration of ions from one half-cell to the other.

c) It connects to the salt bridge.

d) It creates the reduction reaction.

What is the ph of a 3x10-8M H + solution

Which produces barium-137 when it undergoes gamma decay? A. Cesium-137 B. Cesium-138 C. Barium-137 D. Barium-138

How did the gold foil experiment lead to the discovery of the nucleus?

Which of the following summarizes photosynthesis? A. glucose + carbon dioxide → oxygen + water B. carbon dioxide + water → glucose + oxygen + water C. oxygen + water → glucose + carbon dioxide + water D.

As the ph of a solution is changed from 3 to 6, the concentration of hydronium ions A increases by a factor of 3 B increases by a factor of 1000 C decreases by a factor of 3 D decreases by a factor of 1000

Amber has developed a line of organic lotions and handmade soaps with unique, herb-based scents and a touch of bee balm. She plans to sell these products to the wealthy residents of a nearby resort town.

Two pure elements react to form a compound. One element is an alkali metal, X, and the other element is a halogen, Z. Which of the following is the most valid scientific claim that can be made about the compound? a. It has the formula XZ2 b.

Are protons positive and neutrons neutral

Why might it be useful to determine the elements that a planet or moon is made up of?

Which of these is an example of a solution A Sand stirred in water B Sugar stirred in tea C A glass of water with ice in it D Oil and vinegar in a salad dressing jar