For each of the following balanced chemical equations, calculate how many moles of each product would be produced by the complete conversion of 0.25 mol of the reactant indicated in boldface. State clearly the mole ratio
used for the conversion.
a. 3PbO(s) + 2Al(s) 3Pb(s) + Al203(s)
b. C2H2(g) + 2H2(g) C2H6(g)
c. BaO2(s) + 2Na(s) Na2O2(s) + Ba(s)
d. 2CH4(g) + 302(g) 2CO(g) + 4H2O(l)

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .

Select the statement that describe chemical properties a. antacid tablets neutralize stomach acid b. helium is the lightest monatomic element c. water freezes at 0 celsius d. mercury is liquid at room temperature