Why do experiment need to be repeatable?

Which of the following is true? Which of the following is true?

A supersaturated solution holds less solute than it normally can.

How does the molecular motion of a sustance change when it goes from liquid to solid? A) The molecules lose energy, and their relative motion decreases B) The molecules gain energy, and their relative motion decreases C) The molecules gain energy,

What is the kb of carbonate given the ka of carbonic acid is 4.7x10-11?

The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol (CH3OH) and hydrochloric acid (HCl) is 3.32 * 10-10 s-1 at 25°C. Calculate the rate constant at 48.5°C if the activation energy is 116 kJ/mol.

Which of these particles is the smallest? A. an atom B. a nucleus C. a proton D. an electron

In a five-fold serial dilution of a 20 pg/ml solution, all tube dilutions are 1/5. What is the substance concentration in the third tube of this series?

Which of the following substances is never a Brønsted-Lowry base in an aqueous solution? Group of answer choicespotassium hydroxide, KOHsodium hydrogen phosphate, Na2HPO4sodium phosphate, Na3PO4ammonium chloride, NH4Clsodium bicarbonate, NaHCO3

Why is gold less reactive than iron?

Which statements about isozymes are true? Isozymes catalyze different reactions. Isozymes have identical kinetic properties. Isozymes are present in various developmental stages. Isozymes are encoded by the same gene.