Chapter 6
1.) How many atoms are in each elemental sample?
Part A. 3.3 molCu
Part B. 8.7×10−3 mol C
Part C. 24.5 mol Hg
Part D. 0.300 mol Na
2.) 1 mol 6.022×10^23
Suppose you have 897 sheets of paper.
Part D. How many moles of paper do you have?
3.) How many moles of atoms are in each elemental sample?
Part A. 1.50 g Zn
Part B. 28.9 g Ar
Part C. 73.0 g Ta
Part D. 2.28×10−2 g Li
4.) How many aluminum atoms are in 2.14 g of aluminum?
5.) How many atoms are in each elemental sample?
Part C. 9.28 g Bi
Part D. 34.8 g P
7.) Determine the number of moles of molecules (or formula
units) in each sample.
Part A. 44.2 g sodium chloride
Part B 33.9 g nitrogen monoxide
Part D 2.02 mg carbon tetrachloride
8.) How many molecules are in each sample?
Part A. 3.7 g H2O
Part B. 43.6 g N2
Part C. 82 g CCl4
Part D. 11 g C6H12O6
11.) Determine the number of moles of C in each sample
Part A. 2.2 mol CH4
Part B. 0.127 mol C2H6
Part C. 4.89 mol C4H10
Part D. 23.2 mol C8H18
12.) How many grams of Cl are in 27.6 g of each sample of
chlorofluorocarbons (CFCs)?
Part B. CFCl3
Part C. C2F3Cl3
Part D. CF3Cl
15.) Copper (II) fluoride contains 37.42 % F by mass.
Part A. Use this percentage to calculate the mass of fluorine in
grams contained in 39.5 g of copper (II) fluoride.
Chapter 6 1.) How many atoms are in each elemental sample? Part A. 3.3 molCu Part B....
Part A CF2C2 How many grams of Cl are in 42.8 g of each sample of chlorofluorocarbons (CFCs)? ma Value Units Submit Request Answer Part EB CFCl mci- Value Units Submit
How many atoms are in each elemental sample? Part A.) 3.8 mol Cu Express your answer using two significant figures. Part B.) 5.1×10−3 mol C Express your answer using two significant figures. Part C.) 16.1 mol Hg Express your answer using three significant figures. Part D) 0.235 mol Na Express your answer using three significant figures.
How many moles of atoms are in each elemental sample? 3.88×1022 He atoms
2. Complete the following calculations: a. How many atoms are in 0.932 moles of copper? b. How many moles of water are in 9.028 x 1022 water molecules? C. What is the molar mass of calcium carbonate? d. How many grams of water are in a 1.02 mole sample of water? e. How many moles of methane are there in 278 g of methane?
How many total atoms are in 0.170 g of P2O5? How many moles of Fe2O3 are in 211 g of the compound? For the given elements, convert the given mole amounts to grams. How many grams are in 0.0464 moles of sodium? How many grams are in 0.250 moles of cobalt? How many grams are in 0.790 moles of selenium? Calculate the number of atoms in a 5.49 × 103 g sample of lithium. How many moles of MgS2O3 are...
A sample of glucose, C6H12O6, contains 1.280×1021 carbon atoms. Part 1: How many atoms of hydrogen does it contain? Part 2: How many molecules of glucose does it contain? Part3: How many moles of glucose does it contain? Part 4: What is the mass of this sample in grams?
How many atoms are in each elemental sample? 1. 8.6×10−3 mol C Express your answer using two significant figures. 2. 29.3 mol Hg 3. 0.260 mol Na
1. How many moles of Cs are there in a sample that contains 3.17×1022cesium atoms? 2. How many cesium atoms are there in a sample that contains 3.69 mol of Cs? 3. How many moles of Kr are there in a sample that contains 3.23×1022krypton atoms? 4. How many krypton atoms are there in a sample that contains 1.14 mol of Kr? 5. What is the mass of 1.38×1024atoms of magnesium ? 6. How many magnesium atoms are there in...
How many atoms of copper (Cu) are contained in 1.75 moles of copper atoms? How many moles of aluminum ions (Al 3+) are present in 7.25 x 1025 Al 3+ ions? How many moles of aspirin contain 8.62 x 10 28 molecules? How many sugar molecules are contained in 0.475 mole of sugar? What is the molar mass of nicotine (C10H14N2), the toxic and addictive stimulant in tobacco? In this balanced chemical equation, 2 C18H30O2 + 49O2 à 36 CO2...
What is the mass in grams of each elemental sample? Part A 6.66 mol W Part B 0.589 mol Ba Part C 68.7 mol Xe Part D 1.54 molmol S