Question 1

In the presence of cyanuric acid (C₃H₃N₃O₃), melamine (C₃H₆N₆) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

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Question 2

Give an example of a halogen.

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Question 3

How many grams of P₄ (123.88 g/mol) would contain the same number of atoms as 154 g S₈ (256.48 g/mol)?

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Question 4

TNT (C₇H₅N₃O₆, 227.13 g/mol) and RDX (C₃H₆N₆O₆, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

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Question 5

TNT, or trinitrotoluene, has the chemical formula C₇H₅N₃O₆ (227.13 g/mol).Which of the following amounts of TNT contains the most nitrogen?

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Question 6

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 11 protons, 10 electrons, and 12 neutrons.

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Question 7

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of protons as the number of neutrons in ⁵⁶Fe, has a +2 charge, and has a mass number that equals the atomic number of terbium, Tb.

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Question 8

Give an example of a period 4 transition metal.

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Question 9

Uranium ores sometimes contain pockets of trapped helium.What is the origin of the helium?

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Question 10

In early 2016, platinum (195.078 g/mol) was selling for about $1062 per troy ounce (one troy ounce is equal to 31.10 g).How many platinum atoms could you buy for $20?

Accepted Answer

The correct answer is A because:1 troy ounce = 31.10 g$1062 / 31.10 g = $34.15 / g$20 / $34.15 / g = 0.5856 g0.5856 g / 195.078 g/mol = 0.002999 mol0.002999 mol * 6.022 * 10^23 atoms/mol = 1.808 * 10^21 atoms

Question 11

In one sentence, describe the picture of the atom that emerged from the Geiger-Marsden experiment.

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Question 12

Silicon brass contains 82.0% Cu, 14.0% Zn, and 4.00% Si by mass, and its density is 8.28 g/cm³.How many moles of silicon are present in 22.0 cm³ of silicon brass?

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Question 13

Give an example of an alkali metal.

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Question 14

Give an example of an alkaline earth metal.

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Question 15

How many grams of water (18.02 g/mol) would contain 6.54 * 10²⁴ hydrogen atoms?

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Question 16

Give the number of protons, neutrons, and electrons in the following atoms or ions: $ { }^{56} \mathrm{Fe},{ }^{32} \mathrm{~S}^{2-},{ }^{133} \mathrm{Cs}^{+} $$, { }^{89} \mathbf{Y}^{3+},{ }^{31} \mathrm{P}^{3-} $

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Question 17

Gold prices in early 2016 were approximately $41 per gram.Given that the mass of a gold atom is approximately 3.27 *10^-22 grams, how many gold atoms could you buy with a quarter ($0.25)?

Accepted Answer

To find the number of gold atoms you can buy with $0.25, first calculate the mass of gold you can buy: $0.25 / $41 per gram = 0.0061 grams. Then, divide this mass by the mass of a single gold atom: 0.0061 grams / 3.27 x 10^-22 grams/atom = 1.9 x 10^19 atoms.

Question 18

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of electrons as argon, has a -2 charge, and contains equal numbers of protons and neutrons.

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Question 19

You synthesize a sample of a superheavy element with an atomic number of 180.In a mass spectrometer, you find two peaks at 5.08113 * 10^-25kg and 5.11434 *10^-25kg, with the former appearing to be about 2.500 times larger than the latter.What is the approximate average atomic mass of this element in amu? (1 amu = 1.6605 *10^-27kg.)

Accepted Answer

To find the average atomic mass, convert the masses from kg to amu and use the relative abundance to calculate the weighted average. The first peak is 5.08113 x 10^-25 kg / 1.6605 x 10^-27 kg/amu = 305.9 amu, and the second peak is 5.11434 x 10^-25 kg / 1.6605 x 10^-27 kg/amu = 308.1 amu. The weighted average is (2.5 * 305.9 + 1 * 308.1) / 3.5 = 306.6 amu.

Question 20

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 79 protons, 76 electrons, and 118 neutrons.

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Quiz 2: Atoms, Ions, and Molecules the Building Blocks of Matter

In the presence of cyanuric acid (C₃H₃N₃O₃) , melamine (C₃H₆N₆) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

Give an example of a halogen.

How many grams of P₄ (123.88 g/mol) would contain the same number of atoms as 154 g S₈ (256.48 g/mol) ?

TNT (C₇H₅N₃O₆, 227.13 g/mol) and RDX (C₃H₆N₆O₆, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

TNT, or trinitrotoluene, has the chemical formula C₇H₅N₃O₆ (227.13 g/mol) .Which of the following amounts of TNT contains the most nitrogen?

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 11 protons, 10 electrons, and 12 neutrons.

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of protons as the number of neutrons in ⁵⁶Fe, has a +2 charge, and has a mass number that equals the atomic number of terbium, Tb.

Give an example of a period 4 transition metal.

Uranium ores sometimes contain pockets of trapped helium.What is the origin of the helium?

In early 2016, platinum (195.078 g/mol) was selling for about $1062 per troy ounce (one troy ounce is equal to 31.10 g) .How many platinum atoms could you buy for $20?

In one sentence, describe the picture of the atom that emerged from the Geiger-Marsden experiment.

Silicon brass contains 82.0% Cu, 14.0% Zn, and 4.00% Si by mass, and its density is 8.28 g/cm³.How many moles of silicon are present in 22.0 cm³ of silicon brass?

Give an example of an alkali metal.

Give an example of an alkaline earth metal.

How many grams of water (18.02 g/mol) would contain 6.54 * 10²⁴ hydrogen atoms?

Give the number of protons, neutrons, and electrons in the following atoms or ions: ${ }^{56} \mathrm{Fe},{ }^{32} \mathrm{~S}^{2-},{ }^{133} \mathrm{Cs}^{+}$ $, { }^{89} \mathbf{Y}^{3+},{ }^{31} \mathrm{P}^{3-}$

Gold prices in early 2016 were approximately $41 per gram.Given that the mass of a gold atom is approximately 3.27 *10^-22 grams, how many gold atoms could you buy with a quarter ($0.25) ?

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of electrons as argon, has a -2 charge, and contains equal numbers of protons and neutrons.

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 79 protons, 76 electrons, and 118 neutrons.

Quiz 2: Atoms, Ions, and Molecules the Building Blocks of Matter

In the presence of cyanuric acid (C3H3N3O3) , melamine (C3H6N6) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

Give an example of a halogen.

How many grams of P4 (123.88 g/mol) would contain the same number of atoms as 154 g S8 (256.48 g/mol) ?

TNT (C7H5N3O6, 227.13 g/mol) and RDX (C3H6N6O6, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

TNT, or trinitrotoluene, has the chemical formula C7H5N3O6 (227.13 g/mol) .Which of the following amounts of TNT contains the most nitrogen?

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 11 protons, 10 electrons, and 12 neutrons.

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of protons as the number of neutrons in 56Fe, has a +2 charge, and has a mass number that equals the atomic number of terbium, Tb.

Give an example of a period 4 transition metal.

Uranium ores sometimes contain pockets of trapped helium.What is the origin of the helium?

In early 2016, platinum (195.078 g/mol) was selling for about $1062 per troy ounce (one troy ounce is equal to 31.10 g) .How many platinum atoms could you buy for $20?

In one sentence, describe the picture of the atom that emerged from the Geiger-Marsden experiment.

Silicon brass contains 82.0% Cu, 14.0% Zn, and 4.00% Si by mass, and its density is 8.28 g/cm3.How many moles of silicon are present in 22.0 cm3 of silicon brass?

Give an example of an alkali metal.

Give an example of an alkaline earth metal.

How many grams of water (18.02 g/mol) would contain 6.54 * 1024 hydrogen atoms?

Give the number of protons, neutrons, and electrons in the following atoms or ions: 56Fe,32 S2−,133Cs+ { }^{56} \mathrm{Fe},{ }^{32} \mathrm{~S}^{2-},{ }^{133} \mathrm{Cs}^{+} 56Fe,32 S2−,133Cs+,89Y3+,31P3−, { }^{89} \mathbf{Y}^{3+},{ }^{31} \mathrm{P}^{3-} ,89Y3+,31P3−

Gold prices in early 2016 were approximately $41 per gram.Given that the mass of a gold atom is approximately 3.27 *10-22 grams, how many gold atoms could you buy with a quarter ($0.25) ?

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of electrons as argon, has a -2 charge, and contains equal numbers of protons and neutrons.

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains 79 protons, 76 electrons, and 118 neutrons.

In the presence of cyanuric acid (C₃H₃N₃O₃) , melamine (C₃H₆N₆) can form crystals that potentially cause renal failure if ingested.Which contains the most nitrogen?

How many grams of P₄ (123.88 g/mol) would contain the same number of atoms as 154 g S₈ (256.48 g/mol) ?

TNT (C₇H₅N₃O₆, 227.13 g/mol) and RDX (C₃H₆N₆O₆, 222.12 g/mol) are explosive materials.Which of the following contains the most nitrogen?

TNT, or trinitrotoluene, has the chemical formula C₇H₅N₃O₆ (227.13 g/mol) .Which of the following amounts of TNT contains the most nitrogen?

Write the complete atomic symbol with both a superscript and a subscript for the atom or ion that contains the same number of protons as the number of neutrons in ⁵⁶Fe, has a +2 charge, and has a mass number that equals the atomic number of terbium, Tb.

Silicon brass contains 82.0% Cu, 14.0% Zn, and 4.00% Si by mass, and its density is 8.28 g/cm³.How many moles of silicon are present in 22.0 cm³ of silicon brass?

How many grams of water (18.02 g/mol) would contain 6.54 * 10²⁴ hydrogen atoms?

Give the number of protons, neutrons, and electrons in the following atoms or ions: ${ }^{56} \mathrm{Fe},{ }^{32} \mathrm{~S}^{2-},{ }^{133} \mathrm{Cs}^{+}$ $, { }^{89} \mathbf{Y}^{3+},{ }^{31} \mathrm{P}^{3-}$

Gold prices in early 2016 were approximately $41 per gram.Given that the mass of a gold atom is approximately 3.27 *10^-22 grams, how many gold atoms could you buy with a quarter ($0.25) ?