Each of the following questions consists of two statements, I in the left-hand column and II in the right-hand column. For each question, determine whether statement I is true or false and whether statement II is true or false. Select the appropriate answer combination from the choices below. Choices with a filled CE oval denote that statement II is a correct explanation of the true statement I.
At the same temperature and pressure, ![]() ![]() |
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equal volumes of ideal gases at the same temperature and pressure contain the same number of moles. |
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The correct answer is F, T.
According to the ideal gas law , if
,
, and
are the same for two different gases, then
(the number of moles) must be the same. Statement
is therefore true. One mole of
has a mass of
grams and one mole of
has a mass of
grams. Equal numbers of moles of these gases do not have the same mass. Statement
is therefore false.