Atom

Page 1 Name: ____________________________________________ 1) Which quantity of neon may be represented by the symbol Ne? A) 1 gram 2) B) 4 liters C) 6 x 1023 atoms D) 2 moles Which sample of O2 contains a total of 3. 01 x 1023 molecules at STP? A) 16. 0 grams B) 32. 0 grams B) 6. 02 x 1023 C) 2. 00 moles D) 1. 00 mole D) 1. 20 x 1024 What is the total number of atoms contained in 2. 00 moles of nickel? A) 118 C) 58. 9 C) 1 liter of neon D) 1 gram of neon 3) 4) What quantity is represented by the symbol Ne? A) 1 mole of neon B) 1 atomic mass unit of neon 5)

How many moles of hydrogen atoms are present in one mole of C2H4(OH)2? A) 6 B) 2 C) 8 D) 4 What is the mass of 3. 0 x 1023 atoms of neon? A) 10. g B) 1. 0 g C) 20. g D) 0. 50 g A sample of nitrogen containing 1. 5 x 1023 molecules has the same number of molecules as a sample containing A) 1. 0 mole of H2 B) 0. 25 mole of O2 B) 2 C) 0. 50 mole of Ne D) 2. 0 moles of He What is the total number of moles of oxygen atoms in 1 mole of ozone? (Molecular mass = 48) A) 1 C) 3 D) 4 What is the total number of molecules in 1. 0 mole of Cl2(g)? A) 35 B) 12 x 1024 B) O2 C) 70 D) 6. x 1023 D) NH3 6) 7) 8) 9) 10) One mole of which substance contains a total of 6. 02 x 1023 atoms? A) Li C) CO2 What is the total number of hydrogen atoms in one mole of CH3OH? A) 24 x 1023 B) 36 x 1023 B) 8 C) 18 x 1023 C) 10 D) 6. 0 x 1023 D) 5 11) 12) What is the total number of moles of atoms represented by one mole of (CH3)2NH? A) 9 How many moles of hydrogen atoms are there in one mole of C6H12O6 molecules? A) 12 B) 24 C) 12(6. 0 x 1023) C) 1. 0 mole of H2 C) 1. 5 x 1023 C) 6. 0 x 1023 C) 6. 02 x 1023 C) 13 D) 24(6. 0 x 1023) D) 0. 25 mole of O2 D) 3. 0 x 1023 D) 4. x 1023 D) 3. 01 x 1023 D) 8 13) 14) A sample of nitrogen containing 3. 0 x 1023 molecules has the same number of molecules as a sample containing A) 0. 50 mole of Ne B) 2. 0 moles of He What is the total number of molecules of hydrogen in 0. 25 mole of hydrogen? A) 6. 0 x 1023 B) 4. 5 x 1023 B) 1. 5 x 1023 B) 24. 0 x 1023 B) 5 15) 16) What is the total number of molecules contained in 0. 50 mole of O2 at STP? A) 3. 0 x 1023 17) The total number of calcium atoms in 80. 0 grams of calcium is A) 12. 0 x 1023 18) What is the total number of moles of atoms present in 1 mole of Ca3(PO4)2?

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A) 10 What is the total number of moles of atoms in one mole of (NH4)2SO4? A) 15 B) 14 C) 11 D) 10 19) 8568 – 1 – Page 2 20) What is the total number of moles of hydrogen gas contained in 9. 03 x 1023 molecules? A) 9. 03 moles 21) B) 2. 00 moles C) 1. 50 moles D) 6. 02 moles What is the mass in grams of 3. 0 x 1023 molecules of CO2? A) 88 g 22) 23) B) 44 g C) 22 g D) 66 g Which mass contains 6. 0 x 1023 atoms? A) 16 g of sulfur B) 6. 0 g of carbon C) 3. 0 g of helium D) 28 g of silicon What is the mass in grams of 1. 00 mole of O2 gas? A) 32. 0 24) B) 11. 2 C) 16. 0 D) 22. Which gas sample contains a total of 3. 0 x 1023 molecules? A) 2. 0 g of H2 25) B) 38 g of F2 C) 14 g of N2 D) 71 g of Cl2 The total number of molecules in 34. 0 grams of NH3 is equal to A) 1. 00 x 6. 02 x 1023 26) B) 2. 00 x 22. 4 C) 2. 00 x 6. 02 x 1023 D) 1. 00 x 22. 4 Which quantity of O2 contains exactly 3. 01 x 1023 molecules? A) 0. 500 mole B) 32. 0 moles B) 6. 02 x 1023 B) 2 moles B) 20(6 x 1023) B) 3. 50 g C) 16. 0 moles C) 12. 0 x 1023 C) 6 x 1023 atoms C) 6 x 1023 C) 2. 00 g D) 0. 250 mole D) 3. 01 x 1023 D) 1 gram The total number of sodium atoms in 46. 0 grams of sodium is A) 24. x 1023 27) 28) Which quantity of helium may be represented by the symbol He? A) 4 liters 29) What is the total number of atoms in 1 mole of calcium? A) 1 D) 20 30) 31) What is the total mass of 3. 01 x 1023 atoms of helium gas? A) 4. 00 g D) 8. 00 g How many moles of carbon atoms are there in one mole of C6H12O6? A) 6 B) 12 C) 12(6. 0 x 1023) C) 128 g C) 2(6. 0 x 1023) D) 6(6. 0 x 1023) D) 64 g D) 6. 0 x 1023 32) At STP, what mass of CH4 has the same number of molecules as 64 grams of SO2? A) 16 g B) 32 g B) 4(6. 0 x 1023) Approximately how many atoms are there in 3. moles of Al? A) 3(6. 0 x 1023) 33) 34) A sealed container of nitrogen gas contains 6 x 1023 molecules at STP. As the temperature increases, the mass of the nitrogen will A) remain the same B) increase B) 3. 0 x 1023 B) 6. 0 x 1022 B) 6. 0 x 1023 C) 1. 5 x 1023 C) 6. 0 x 1024 C) 1. 5 x 1023 C) decrease D) 6. 0 x 1023 D) 6. 0 x 1023 D) 12 x 1023 How many molecules are in 0. 25 mole of CO? A) 9. 0 x 1023 35) 36) What is the total number of molecules of SO2, in a 0. 10-mole sample of SO2? A) 6. 0 x l021 37) How many molecules are in 0. 25 mole of O2? A) 3. 0 x 1023

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