Multiple Choice
At standard temperature and pressure (STP), what is the volume occupied by 1 mole of an ideal gas?
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7. Gases
Standard Temperature and Pressure
Multiple Choice
Which of the following samples at standard temperature and pressure (STP) has the same chemical properties as 10 grams of Al(s) at STP?
A
10 grams of Al2O3(s)
B
10 grams of AlCl3(s)
C
10 grams of powdered Al(s)
D
10 grams of Mg(s)
Verified step by step guidance1
Understand that chemical properties depend on the identity of the element or compound, not just the mass. Aluminum (Al) has specific chemical properties distinct from its compounds or other elements.
Identify the substances given: Al(s) is elemental aluminum, Al2O3(s) and AlCl3(s) are compounds containing aluminum, and Mg(s) is a different element (magnesium).
Recall that compounds like Al2O3 and AlCl3 have different chemical properties from elemental aluminum because their atoms are bonded differently and have different structures.
Recognize that 10 grams of powdered Al(s) is the same element and form as 10 grams of Al(s), so it will have the same chemical properties regardless of particle size.
Conclude that only the sample of 10 grams of powdered Al(s) has the same chemical properties as 10 grams of Al(s) at STP, because it is the same element in the same physical state.
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