What is pigment? And is it in leaves?

The distance between the earth and the sun is 90.0 million miles. calculate this distance in meters up to three significant digits. what is the answer?

Which statement best relates an empirical formula with a molecular formula

Which of the following is a sign a chemical reaction has occurred? A solid dissolves in a liquid. A solid forms when two liquids are mixed. A solid melts to a liquid when it is heated. A solid metal changes shape.

A pitcher pitches a ball to a waiting batter and the batter hits a pop fly deep into the outfield where it is caught. Which of these has the most kinetic energy? A. the baseball right as it hits the bat B. the baseball right as it leaves the bat C.

What other elements does zinc bond with?

Ab2 has a molar solubility of 3.72*10-4 m. what is the value of the solubility product constant for ab2? express your answer numerically.

Thermal decomposition of sodium azide (NaN₃) into nitrogen gas and sodium metal is used to inflate car airbags. The reaction proceeds by the following chemical reaction. 2NaN₃ (s) ⟶3N₂ (g) + 2Na (s) How many grams of NaN₃ are need to inflate a 10.

Is salt water acidic, basic or neutral

The process of gathering knowledge about the natural world

4. Which of the following elements has the greatest electronegativity? a. Krypton b. Bromine c. Phosphorous d. Sulfur