Select the incorrect statement.
the physical properties of a compound are similar to those of its elements.
the boiling point of a compound is different from the individual elements.
the melting point of a compound is different from the individual elements.
density is a physical property.

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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?