Which of the following processes has an increase in entropy?

A) Boiling a pot of water

B) Freezing a sample of water

C) Filtering sand out of a sample of water

D) Synthesizing water from hydrogen and oxygen

Give an example for each of the following terms: (a) matter, (b) substance, (c) mixture.

Is phenoxyethanol an organic compound?

C5H12 + 8O2 10CO2 + 6H2O What is the mole ratio of oxygen to pentane? 1:6 6:8 8:1 10:8

Recall that the value of Kw for the autoionization of water varies with temperature. At the temperature of your body (37°C), Kw = 3.98 x 10-14 rather than 1.00 x 10-14. What is the pH of pure water at 37°C?

Sodium borohydride is stable in acidic aqueous solutions. True or False

How much CO2 is produced from 10g of CH4?

Balance the following redox reaction in acidic solution. Zn (s) + MnO-4 (aq) → Zn+2 (aq) + Mn+2 (aq)

66.0g of dry ice (solid carbon dioxide)

Select all the discoveries for which ernest rutherford is credited. the emissions of radioactive elements the neutron the electron the proton

Calculate the concentration of a solution made by diluting 86.0 mL of 4.4 M HBr to a final volume of 575.0 mL. Significant figures are graded for this problem. Be sure you do not round your answers until the very end of your calculations.