20cm³ of methane burns in excess oxygen.

a) what is the volume of oxygen required for this reaction?

What does the electron transport chain do to the concentration of hydrogen ions (protons) ?

The name of CuO is what

The measure of how acidic or base a solution is

In plants, the first product of carbon fixation is the three-carbon compound 3-pga formed in the calvin cycle. 2. when such plants close their stomata on hot, dry days to conserve water, builds up in the leaf and is added to rubp in place of co2.

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

A plant grows three inches in a month. Why is this a physical change?

In natural convection heat transfer, the parameter is the Choose the right answer a) Nusselt number b) Rayleigh number c) Grashof number d) Lewis number

An insulator: A. Conducts heat well B. Does not conduct heat well C. Is used to heat cold objects D. Is used to cool hot objects

Which of the following choices would have a negative entropy change? A. N2 (g) + 3H2 (g) - >2NH3 (g) B. CaCO3 (s) - > CaO (s) + CO2 (g) C. H2O (s) - > H2O (l) D. Fe2O3 (s) + 3C (s) - > 2Fe (s) + 300 (g)

Increasing the temperature of a liquid-solid solution will: