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- Provide a reasonable estimate for the number of atoms in a 150-lb adult human. Use the information given in Table 20.2.If you had a mole of U.S. dollar bills and equally distributed the money to all of the people of the world, how rich would every person be? Assume a world population of 7 billion.2. For Exp 5: a. Write the balanced chemical equation for the reaction between Magnesium and oxygen. b. Explain the difference between empirical formula and molecular formula 10 19 tv MacBook Air 80 000 000 DII F3 F4 F5 F6 F7 F8
- Match the correct number of nitrogens with the correct situation that you see below ✓2 NH4NO3 A. 4 ✓10 HNO3 ✓3 N2 ✓ 8 HCN ķ B. 8 C. 1 D. 3 E. 10 F. 2 G. 6 H. 77. How many sodium atoms is equal to five moles of the atoms? а. 5 b. 3.011 x 1024 с. 500 d. 6.022 x 1023 8. One mole is equivalent to a. 3.75 g Hydrogen b. 16 g Oxygen c. 14 g Carbon d. 190 g Gold 9. What does the mole measure? C. amount of a substance d. density of a gas a. mass of a substance b. volume of a gas4. One mole is equivalent to a. 3.75 g Hydrogen c. 16 g Oxygen b. 14 g Carbon d. 190 g Gold 5. What does the mole measure? a. mass of a substance b. amount of a substance c. volume of a gas d. density of a gas 6. What does Avogadro's number represent? a. the number of atoms in 1 mol of an element b. the number of molecules in 1 mol of a compound c. the number of Na* ions in 1 mol of NaClag) d. all of the above
- What is the mass of aluminum oxide (101.96 g/mol) produced from 3.59 g of iron(II) oxide (71.85 g/mol)?__FeO(l) + __Al(l) __Fe(l) + __Al2O3(s) a. 1.70 g b. 0.842 g c. 5.10 g d. 7.58 g e. 15.3 gWhich elements can form -2 ions? B. Gric beryllium and calcium b. lithium and fluorine magnesium and chlorine d. C. oxygen and sulfur 10. Which pair of elements will most likely exhibit similar chemical properties? hydrogen and helium nitrogen and phosphorus b. potassium and krypton di 11. What element will be the best conductor of electricity? C. sodium and aluminum helium b. phosphorus potassium d. sulfur C. 96 Exploring Life Through Science-Chemistry23) 0.6 moles of strontium phosphate contains how many oxygen atoms? A. 0.8 NA B. 2 NA C. 2.88x1024 D. 4 NA E. 3.2x1023
- From the following structures, select a reasonable resonance contributing structure for the molecule below. 0: FO: :0: :Br: CEN N IZ b. :N H 0: :0 :Br: 0: :0: öº Br N: -CEN hpIn a beaker containing 20.0 g AgCl, 30.0 of NaCl, and 50.0 g of KCl. How much chlorine (in grams) is present in the beaker? (hint: 1 mole Cl: 1 mole AgCl, 1 mole Cl: 1 mole NaCl, 1 mole Cl: 1 mole KCl) a. 46.92 g b. 49.62 g c. 42.96 g d. 24.69 gConsider the multistep synthesis below. 4 Br 3 mCPBA 5 1 NaOH x 2 Br
