Sugar is a pure substance, but it is not an element. Which sentences support this statement?
Hint: Consider the definition of an element.
Select all that apply.
Animals break down sugar through cellular respiration.
Sugar crystals dissolve in water, but the smaller particles are still sugar.
The process of cellular respiration uses sugar and provides energy to cells.
Plants make sugar using water (H20), carbon dioxide (CO2), and sunlight.

Geothermal energy for industrial use is available almost anywhere. a.true b.false

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?