Calculate the mass (in g) of 346 cm³ of polythene. The density of polythene is 0.95 g/cm³. Give your answer to 2 decimal places.

How does a buffer resist change in pH upon addition of a strong acid? The strong acid reacts with the strong base in the buffer to form a salt, which produces few H + ions in solution and therefore only a little change in pH.

Define the term relative atomic mass, A.

Which solutions most concentrated? 1) 0.1 mole of solute dissolved in 400 ml of solvent 2) 0.2 mole of solute dissolved in 300 ml of solvent 3) 0.3 mole of solute dissolved in 200 ml of solvent 4) 0.4 mole of solute dissolved in 100 ml of solvent

How do water molecules dissolve a salt?

The most important commercial process for generating hydrogen gas is the water-gas shift reaction:. CH4 (g) + H2O (g) → CO (g) + 3H2 (g). Use tabulated thermodynamic data to find ΔG° for this reaction at the standard temperature of 25°C.

Target tissues of hormones are always near the glands that release the hormones. true or false

What four things affect the tides

What fraction of the enzymes will be active at ph=4.07 explain?

The temperature of a liquid is measured to be 212 °F. Soon afterward, the temperature is taken again and is determined to be 100 °C. Which of these is a possible true statement about the motion of the liquid's particles? A.

In a solution at 25°C, the [H+] is 3.5 * 10-6 M. What is the [OH-]?