Slide 1 / 75 Slide 2 / 75 1 What is the SI unit for measurement of - PDF document

Slide 1 / 75 Slide 2 / 75 1 What is the SI unit for measurement of number of 2 How many moles of tungsten atoms are there in 4.8 x 10 25 atoms of tungsten? particles in a substance ? 1.3 x 10 -1 moles A A kilogram 8.0 x 10 -1 moles B B ampere 1.3 x 10 -2 moles C candela C 8.0 x 10 1 moles D mole D 8.0 x 10 2 moles E Kelvin E Slide 3 / 75 Slide 4 / 75 3 How many moles of silver atoms are there in 1.8 x 4 How many atoms are there in 5.7 mol of hafnium? 10 20 atoms of silver? 3.43 x 10 24 atoms A 3.0 x 10 2 A 1.06 x 10 22 atoms B 3.3 x 10 -3 B 1.06 x 10 23 atoms C 3.0 x 10 -4 C 3.43 x 10 23 atoms D 1.1 x 10 44 D 6.02 x 10 23 atoms E Slide 5 / 75 Slide 6 / 75 5 How many atoms are there in 0.075 mol of 6 How many molecules are there in 2.1 mol CO 2 ? titanium? 1.26 x 10 24 molecules A 1.2 x 10 -25 A 3.49 x 10 -24 molecules B 6.4 x 10 2 B 2.53 x 10 24 molecules C 4.5 x 10 22 C 3.79 x 10 24 molecules D D 3.6 1.05 x 10 -23 molecules E 2.2 x 10 24 E

Slide 7 / 75 Slide 8 / 75 7 8 Butanol is composed of carbon, hydrogen, and How many ammonium ions, NH 4 + , are there in 5.0 oxygen. If 1.0 mol of butanol contains 6.0 x 10 24 mol (NH 4 ) 2 S? atoms of hydrogen, what is the subscript for the hydrogen atom in C 4 H x O ? 3.4 x 10 2 A 6.0 x 10 24 B A 1 6.0 x 10 25 C B 8 3.0 x 10 24 D C 6 1.5 x 10 25 E D 4 E 10 Slide 9 / 75 Slide 10 / 75 9 How many moles of helium atoms are there in 2.4 10 How many atoms are there in 3.5 moles of arsenic x 10 24 helium atoms? atoms? A 4.0 mol B 10.0 mol 2.1 x 10 23 atoms A 2.4 x 10 24 mol C 1.7 x 10 23 atoms B D 2.0 mol 2.6 x10 2 atoms C E 6.0 mol 2.1 x 10 24 atoms D 7.5 x 10 1 atoms E Slide 11 / 75 Slide 12 / 75 11 How many bromide ions are there in 1.5 moles of 12 How many hydrogen atoms are in 5 molecules of MgBr 2 ? isopropyl alcohol, C 3 H 8 O? A 5 5 x (6.02 x 10 23 ) B 9.0 x 10 23 ions A 35 x (6.02 x 10 23 ) C 1.8 x10 24 ions B D 35 9.0 x 10 23 ions C D 3.0 ions 5.0 x10 -24 ions E

Slide 13 / 75 Slide 14 / 75 13 14 Which of the following is NOT a representative How many moles of SO 3 are in 2.4 x 10 24 molecules particle? of SO 3 ? 3.4 x 10 22 A A molecule B 0.25 B anion C 4.0 C cation 2.9 x 10 -23 D D electron 4.0 x10 -1 E atom E Slide 15 / 75 Slide 16 / 75 15 Which of the following elements exists as a diatomic 16 Avogadro's number of representative particles is molecule? equal to one _____. A sulfur A liter B aluminum B kelvin C lithium C mole D neon D gram E nitrogen E kilogram Slide 17 / 75 Slide 18 / 75 17 All of the following are equal to Avogadro's 18 Avogadro's number is _____. number EXCEPT _____. A the number of atoms of gold in 1 mol Au A a dozen B the number of atoms of bromine in 1 mol Br 2 6.02 x 10 23 B the number of molecules of carbon monoxide in C 1 mol CO C the weight of a carbon atom D D a mole the number of molecules of nitrogen in 1 mol N 2 the number of formula units of sodium E dependent on what is measured E phosphate in 1 mol Na 3 PO 4

Slide 19 / 75 Slide 20 / 75 19 Which of the following is not a true statement 20 The gram atomic masses of any two elements concerning the gram atomic mass? contain the same number of _____. The gram atomic mass is the mass of one mole of A A ions atoms. B atoms The gram atomic mass is 12 g for magnesium. B C grams The gram atomic mass is found by checking the D anions C periodic table. E milliliters The gram atomic mass is the mass of 6.02 x 10 23 D atoms of any monatomic element. The gram atomic mass is the number of E grams of an element that is numerically equal to the atomic mass in amu. Slide 21 / 75 Slide 22 / 75 21 22 The gram molecular mass of oxygen is _____. The gram formula mass of C 7 H 16 and the gram formula mass of CaCO 3 contain approximately the same number of _____. A 16.0 g B equal to the mass of one mole of oxygen atoms A anions C 32.0 g B carbon atoms D none of the above C grams E 16 amu D cations E atoms Slide 23 / 75 Slide 24 / 75 23 What is the gram formula mass of AuCl 3 ? 24 What is the gram formula mass of chromic sulfate, Cr 2 (SO 4 ) 3 ? A 96 g A 200.0 g B 130 g B 148.1 g C 303.6 g C 344.2 g D 626.5 g D 288.0 g E 232.5 g E 392.2 g

Slide 25 / 75 Slide 26 / 75 25 26 How many grams are in 0.90 mol Pd? What is the gram formula mass of (NH 4 ) 2 CO 3 ? A 0.008 46 g A 138 g B 106.4 g B 78 g C 0.900 g C 96 g D 1.80 g D 138 E 95.8 g E 43 Slide 27 / 75 Slide 28 / 75 27 28 What is the mass in grams of 5.90 mol C 8 H 18 ? What is the number of moles in 432 g Ba(NO 3 ) 2 ? A A 673 g 3.66 B 0.0512 g B 0.605 C 19.4 g C 0.237 D 389 g D 1.65 E 3.55 x 10 24 g E 113,000 Slide 29 / 75 Slide 30 / 75 29 30 What is the number of moles in 15.0 g AsH 3 ? What is the number of moles in 0.025 g (NH 4 ) 2 Cr 2 O 7 ? A 1200 1.5 x 10 22 A B 0.19 4.2 x 10 -26 B C 5.2 C 6.3 D 0.44 1.0 x 10 -4 D E 2.3 1.0 x 10 4 E

Slide 31 / 75 Slide 32 / 75 31 What is the mass, in grams, of 0.450 moles of Sb? 32 What is the number of moles of beryllium atoms in 36 g of Be? 5.48 x 10 1 g A 2.2 x 10 25 mol A 2.02 x 10 1 g B B 320 mol C 0.450 g C 4.0 mol 2.71 x 10 23 g D D 45.0 mol 3.55 x 10 1 g E E 0.25 mol Slide 33 / 75 Slide 34 / 75 33 34 How many moles of CaBr 2 are there in 5.0 grams of The chemical formula of aspirin is C 9 H 8 O 4 . What is the mass of 0.40 mol of aspirin? CaBr 2 ? 1.0 x 10 3 mol A A 72 g 2.5 x 10 -2 mol B B 45 g 4.2 x 10 -2 mol C C 160 g 4.0 x 10 1 mol D D 10.8 g 3.0 x 10 24 mol E E 80 g Slide 35 / 75 Slide 36 / 75 35 The mass of a mole of NaCl is the _____. 36 Select the correct statement. A gram formula mass Gram formula mass refers to all elements and A compounds. B gram molecular mass B Gram atomic mass refers to all elements. C gram atomic mass Gram Avogadro mass refers to binary D atomic mass C compounds only. E gram molar mass Gram molecular mass refers to all ionic D compounds. Molar mass refers to ternary ionic compounds E only.

Slide 37 / 75 Slide 38 / 75 37 38 What is the volume, in liters, of 6.8 mol of Kr gas What is the volume, in liters, of 0.50 mol of C 3 H 8 at STP? gas at STP? A 22.4 L A 13,000 L B 0.0335 L B 25 L C 5.60 L C 3.3 L D 16.8 L D 152 L E 11.2 L E 0.30 L Slide 39 / 75 Slide 40 / 75 39 What is the number of moles in 500 L of He gas at 40 What is the number of moles in 9.63 L of H 2 S gas STP? at STP? A 0.05 mol A 3.54 mol B 0.2 mol B 0.104 mol C 10,000 mol C 216 mol D 22 mol D 14.7 mol E 90 mol E 0.430 mol Slide 41 / 75 Slide 42 / 75 41 42 How many moles of Ar atoms are there in 202 L of What is the volume of 2.8 moles of NO 2 gas at STP? Ar gas at STP? 1.20 x 10 24 mol A 1500 L A 1.11 x 10 -1 mol B 0.13 L B 4.52 x 10 3 mol C 63 L C D 8.0 L D 9.02 mol E 130 L E 1.79 mol

Slide 43 / 75 Slide 44 / 75 43 What is the volume (in liters at STP) of 2.50 mol of 44 The volume of one mole of substance is 22.4 L at carbon monoxide? STP for all _____. A 3.1 L A liquids B 9.0 L B elements C 56 L C solids D 70 L D gases E compounds E 560 L Slide 45 / 75 Slide 46 / 75 45 A 22.4-L sample of which of the following 46 Which of the following gas samples would have substances, at STP, would contain 6.02 x 10 23 the largest number of representative particles at representative particles? STP? A sulfur A 7.0 L O 2 B cesium iodide B 0.007 L SO 3 C C gold 0.10 L Xe D D oxygen 12.0 L He All would have the same number of E 5.5 L N 2 O 4 E representative particles. Slide 47 / 75 Slide 48 / 75 47 The volume occupied by 1 mol of a gas at STP is 48 Which combination of temperature and pressure _____. correctly describes standard temperature and pressure, STP? A 0°C A 100°C and 100 kPa B 1 kilopascal B 0°C and 101 kPa C 12 grams C 1°C and 0 kPa D 22.4 L 22.4°C and 6.02 x 10 23 kPa D a volume that depends upon the nature of the E gas E 0°C and 22.4 kPa