Worksheet Atoms, Molecules and Stoichiometry
Authored by Ivan Aritonang
Chemistry
11th Grade
Used 1+ times
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12 questions
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1.
OPEN ENDED QUESTION
1 min • 1 pt
Define the term unified atomic mass unit
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2.
MATH RESPONSE QUESTION
3 mins • 2 pts
Calculate the relative atomic mass, Ar of copper in this sample using the data in the Table 2.1. Show your working
Mathematical Equivalence
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3.
OPEN ENDED QUESTION
1 min • 1 pt
Calculate the percentage abundance of isotope magnesium-26, 26Mg.
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4.
MATH RESPONSE QUESTION
3 mins • 2 pts
Calculate the mass of X. Use the data from Table 2.2 and Ar Magnesium = 24.31 in your calculation.
Show your calculation.
Mathematical Equivalence
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5.
OPEN ENDED QUESTION
3 mins • 2 pts
Determine the empirical formula of the organic compound Y.
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6.
OPEN ENDED QUESTION
2 mins • 2 pts
If the molar mass (Mr) of the compound Y is found to be 180, determine its molecular formula.
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7.
OPEN ENDED QUESTION
2 mins • 1 pt
Write the balanced equation for this combustion reaction.
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