20. What is the area of a piece of metal foil that measures 43.9 cm by 29.21 cm? Express the answer to

the correct number of significant figures.

a. 128 cm2

b. 1280 cm?

1280.3 cm?

d. 1280.32 cm

128.0319 cm?

C.

e.

What are observable changes when burning a log?

What is the formula for sodium sulfate? a. na (so) b. naso c. naso d. na (so) ?

How many grams of CO2 will be produced from 12.0 g of CH4 and 133 g of O2?

Ca (HCO3) 2 (s) decomposes at elevated temperatures according to the stoichiometric equation: Ca (HCO3) 2 (s) → CaCO3 (s) + H2O (g) + CO2 (g).

What is the value of n in ch3 (ch2) nch3 if the name of the hydrocarbon is heptane?

How many milliliters of a 2.5 M LiOH solution are needed to completely neutralize 25 mL of a 1.0 M H2SO4 solution?

What is a neutralisation reaction?

Pure water at 25°C ionizes as what?

Calculate the number of ATPs generated by the complete metabolic oxidation of tripalmitin (tripalmitoylglycerol). Hydrolysis of the triacylglycerol occurs at the cell surface.

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas? It would increase. It would be halved. It would stay the same.