What is the charge on the titanium ion in TiO2?

A) (+4) B) (+2) C) (+1) D) (-1) E) (-2) A) (+4) B) (+2) C) (+1) D) (-1) E) (-2)

A 1.5 g tablet for pain might contain 0.30 g acetaminophen C8H9NO2, 151.16 g/mol) and 0.044 g codeine (C18H21NO3, 299.36 g/mol).Calculate the number of moles of codeine in the tablet.

A) 1.5* 10-4 mol B) 2.9*10-4 mol C) 1.0 * 10-3 mol D) 5.0 *10-3 mol E) 1.1 *10-1 mol A) 1.5* 10-4 mol B) 2.9*10-4 mol C) 1.0 * 10-3 mol D) 5.0 *10-3 mol E) 1.1 *10-1 mol

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

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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)?

(Multiple Choice)

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Question 121

What is the symbol for magnesium?

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Question 122

Give an example of a period 4 transition metal.

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Question 123

A strontium-90 atom that has lost 2 electrons has ___ protons, _neutrons, and _____ electrons.

(Multiple Choice)

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Question 124

Elements 21 through 30 are known as _______.

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Question 125

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.

(Short Answer)

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Question 126

A cation has a _ charge because it has _ electrons.

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Question 127

Which has the highest molecular mass?

(Multiple Choice)

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Question 128

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

(Multiple Choice)

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Question 129

What is the formula unit mass of chromium(III) oxide (Cr₂O₃)?

(Multiple Choice)

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Question 130

Which statement is true about the mole and molar mass?

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Question 131

What is the charge on the titanium ion in TiO₂?

(Multiple Choice)

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Question 132

What is the symbol for potassium?

(Multiple Choice)

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Question 133

What is the correct symbol for an electron?

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Question 134

How many hydrogen atoms are in 102 amu of pure ammonia (NH₃)?

(Multiple Choice)

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Question 135

A 1.5 g tablet for pain might contain 0.30 g acetaminophen C₈H₉NO₂, 151.16 g/mol) and 0.044 g codeine (C₁₈H₂₁NO₃, 299.36 g/mol).Calculate the number of moles of codeine in the tablet.

(Multiple Choice)

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Question 136

Which statement regarding Millikan's oil drop experiment is true?

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Question 137

Which has the highest formula unit mass?

(Multiple Choice)

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Question 138

Which subatomic particles have opposite charges?

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Question 139

Which of the following statements is true regarding Thomson's cathode ray experiment and the discovery of electrons?

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Question 140

Showing 121 - 140 of 143

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

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)?

What is the symbol for magnesium?

Give an example of a period 4 transition metal.

A strontium-90 atom that has lost 2 electrons has _______ protons, _______neutrons, and _______ electrons.

Elements 21 through 30 are known as _______.

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.

A cation has a _______ charge because it has _______ electrons.

Which has the highest molecular mass?

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

What is the formula unit mass of chromium(III) oxide (Cr2O3)?

Which statement is true about the mole and molar mass?

What is the charge on the titanium ion in TiO2?

What is the symbol for potassium?

What is the correct symbol for an electron?

How many hydrogen atoms are in 102 amu of pure ammonia (NH3)?

A 1.5 g tablet for pain might contain 0.30 g acetaminophen C8H9NO2, 151.16 g/mol) and 0.044 g codeine (C18H21NO3, 299.36 g/mol).Calculate the number of moles of codeine in the tablet.

Which statement regarding Millikan's oil drop experiment is true?

Which has the highest formula unit mass?

Which subatomic particles have opposite charges?

Which of the following statements is true regarding Thomson's cathode ray experiment and the discovery of electrons?

Matter and Energy an Atomic Perspective

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Properties of Solutions Their Concentrations and Colligative Properties

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

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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)?

A strontium-90 atom that has lost 2 electrons has ___ protons, _neutrons, and _____ electrons.

A cation has a _ charge because it has _ electrons.

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

What is the formula unit mass of chromium(III) oxide (Cr₂O₃)?

What is the charge on the titanium ion in TiO₂?

How many hydrogen atoms are in 102 amu of pure ammonia (NH₃)?

A 1.5 g tablet for pain might contain 0.30 g acetaminophen C₈H₉NO₂, 151.16 g/mol) and 0.044 g codeine (C₁₈H₂₁NO₃, 299.36 g/mol).Calculate the number of moles of codeine in the tablet.