What is the SI unit that refers to the amount of a substance?

Why the climate is colder close to the north and south poles than it is at the equator

Nitrogen will react with hydrogen to form the compound ammonia. The compound formed has properties that are different from the elements that make it up. What has to occur in order for this compound to be formed?

Predict the geometry about each interior atom in acetic acid:

Which statements describe properties of stars? Check all that apply Stars produce energy through nuclear fusion. Stars produce energy through gravity. Stars are massive objects composed of gas. Stars are solid objects that we could stand on.

When Sodium Hydroxide and Sulfuric Acid are mixed together, a neutralization reaction occurs. If 2.26 grams of sodium hydroxide are mixed with 4.

A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCI, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g.

When 1 g of sodium chloride (NaCl) is placed in 100 g of water, a solution results. Once the solution is prepared, water is now considered what part of the solution?

1. How is pressure affected as depth increases? 2. As the sun heats the surface of the oceans, two layers of water result. What separates the layers? 3. How is temperature affected when? (a) the depth increases (b) the latitude increases 4.

Are nails in a jar with water a chemical change

What is the molarity of a solution composed of 4.73 g of potassium iodide (KI) dissolved in enough water to make 0.169 L of solution? Answer in units of M.