A 5.00 ml sample of this koh solution is added to a 250 ml volumetric flask, and water is added to the mark. what is the new molarity of k + ions in this solution?

A molecule is found to contain 47.35% by mass c, 10.60% by mass h, and 42.05% by mass o. what is the empirical formula for this molecule?

Which of the following is a common source of groundwater pollution? A. Oil dumping and Oil Spills B. Tossing candy bar wrappers into a stream C. Flushing household chemicals down the toilet D. Leaking storage containers outside factories

Zachary adds 26.45 g to 2.55 g. How many significant figures should his answer have? two three four five

Identify the statement that correctly describes light and how it travels?

Why does increasing the temperature speed up a reaction? O A. It provides energy to overcome the activation energy. B. It forces the reaction to favor the product side at equilibrium. O c.

What is done with the reactive sodium after the reaction to make sure the products are safe in an air bag?

Which of the following does not indicate a chemical change? precipitate formation crushing a solid into a powder color change gas evolution

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?

What are the products of the alpha decay of Iodine-131?

Which lewis electron-dot diagram represents a nitrogen atom in the ground state