What do not have a definite shape or volume in sience?

write out the acid dissociation reaction for hydrochloric acid. b) calculate the pH of a solution of 5.0 x 10^-4 M HCl. c) write out the acid dissociation reaction for sodium hydroxide. d) calculate the pH of a solution of 7.0 x 10^-5 M NaOH.

A reaction produces 10.5 L if oxygen, but was supposed to produce 1 mol of oxygen. What is the percent yield? (One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question)

What are the hypotheses on which Dalton's atomic theory is based?

H the primary intracellular and extracellular anions (negatively charged ions) and cations (positively charged ions) with their electrolytes:

A 25.0 mL sample of H3PO4 requires 50.0 mL of 1.50 M NaOH for complete neutralization. What is the molarity of the acid?

Identify the medium for the following waves: • The Wave Exercise waves: • Ripples on a pond: • Sound waves from a stereo speaker: • Seismic (earthquake) waves:

What is most believed by most scientists about the age of our solar system.

Just as heat can denature enzymes, so can a change in the pH. Enzymes that normally work in an acidic environment in the body can become denatured if the pH becomes too alkaline.

In a reversible reaction, both the forward and reverse reactions take place A. at the same rate. B. at two different rates. C. at varying, unequal rates. D. under different experimental conditions.

Choose the element that would be the most reactive of the three.