Ahydrogen ion [h3o+] concentration of 2.68 x10-3 is best represented by which ph?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?