a pure substance that can't be broken down into simpler substances by chemical or physical means.

A. chemical

B. atom

C. element

D. mineral

Which of the following is the best explanation for a covalent bond? A. electrons simultaneously attracted by more than one nucleus B. the overlapping of two electron-filled orbitals having different energies C.

What must occur in a substance in order to determine a chemical property?

Calculate the solubility at 25°c of cubr in pure water and in a 0.0030m cobr2 solution. you'll find ksp data in the aleks data tab. round both of your answers to 2 significant digits. solubility in pure water: gl

The chemical properties of calcium most similairto the chemical properties of

What function does DNA serve?

How many molecules of sodium nitrate are produced when 17 g of sodium azide, NaN3, react according to the following equation: NaN3 (aq) + AgNO3 (aq) - --> AgN3 (s) + NaNO3 (aq) Question options: 3.7x1023 1.6 x 1023 1.85x1023 6.02x1023

Which statement is true for the given reaction? Zn + PbSO4

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?