What is the pH of a 0.1 M acid solution?

The ion 27al3 + contains which combination of protons, neutrons, and electrons?

A 50.0-mL aliquot was taken from a 500.0 mL sample of tonic water containing an unknown amount of quinine and diluted to a volume of 200.0 mL. At 347.5 nm, the fluorescence intensity of the diluted sample was measured as 127 on an arbitrary scale.

What is Avogadro's number? a. the number of atoms in exactly 14.00 g of carbon-12 b. the number of atoms in a kilogram of any substance c. the number of atoms, molecules, ions, formula units, or other particles in a mole of a substance d.

Do you need to list everyday household objects such as scissors and x-acto knives in your science fair materials/methods?

The rates of which reactions are increased when the temperature is raised? a. endothermic reactions only b. both endothermic reactions and exothermic reactions c. exothermic reactions only d. depends on the value of delta h not the sign

Describe the charges of the subatomic particles by choosing the answer from the drop-down menu. Proton have a charge. Have a 0 charge. Electrons have a charge.

How did Alexander effect the people of Judah?

Is it possible for a molecule only made up of hydrogen and carbon to be polar?

Which of these represents a chemical change?

Why do think there is often only a short amount of time to evacuate an area before an earthquake?