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Eleventh Grade (Grade 11) Molecules and Compounds Questions

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Grade 11 Molecules and Compounds
What is the empirical formula of the compound whose molecular formula is P4O10?
  1. PO
  2. PO2
  3. P2O5
  4. P8O20
Grade 11 Molecules and Compounds
What is the total number of atoms contained in 2.00 moles of nickel?
  1. 58.9
  2. 67
  3. 6.02×1023
  4. 1.2×1024
Grade 11 Molecules and Compounds
What is the correct formula for potassium oxide?
  1. K2O
  2. K2O2
  3. KO
  4. KO2
Grade 11 Molecules and Compounds
How many grams are present in 1 mole of Al2O3?
  1. 90 g
  2. 102 g
  3. 65 g
  4. 250 g
Grade 11 Molecules and Compounds
How many moles are found in 20 grams of Al2O3?
  1. .2
  2. 2
  3. 20
  4. .02
Grade 11 Molecules and Compounds
How many grams are found in 4.5 moles of Al2O3?
  1. 45.9 grams
  2. 459 grams
  3. 4.59 grams
  4. 4590 grams
Grade 11 Molecules and Compounds
What is the formula for nitrogen dioxide?
  1. NO
  2. N2O
  3. NO2
  4. N2O2
Grade 11 Molecules and Compounds
What is the gram formula mass of K2CO3?
  1. 138 g
  2. 106 g
  3. 99 g
  4. 67 g
Grade 11 Molecules and Compounds
Which of the following is a binary compound?
  1. potassium chloride
  2. ammonium chloride
  3. potassium chlorate
  4. ammonium chlorate
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