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How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6

How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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O How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6 O Identify the chalcogen that has 18 neutrons in the nucleus. A) sulfur-32 B) sulfur-34 C) sulfur-33 ) What's the mass number of carbon-14 ? В) 8 A) 6 C) 14 ) What's the atomic number of sulfur-34 ? A) 34 B) 18 C) 16 ) In the formula of hydroxylapatite Ca,o(PO4)6(OH)2 determine the number of each kind of atom, Ca, O, H, P: A) Са — 10; О -8;B Н — 2; Р - 6 с) Са — 10; О — 12;B Н — 2;B Р - 6 B) Ca – 10; O – 26; H – 2; P - 6 D) Ca – 10; O – 26; H – 2; P - 1 ) Which element is represented by the chemical symbol TI ? A) tantalum B) thorium C) thallium ) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example of A) Dalton's atomic theory B) law of conservation of mass C) law of definite proportions ) Write the empirical formulas for the following compound: A) C,H¿O2 B) CH,O C) C2H,0 ) Write a sentence that describes how to determine the number of moles of a compound in a known mass of the compound if we know its molecular formula. A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar mass of the compound by the mass of compound. B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass of the molar mass of the compound. compound with the molar mass of the compound. ) Compare 1 mole of H 1 mole of O, and 1 mole of F, Which has the largest number of molecules? Which has the greatest mass? A) All three have the same number of molecules, since a mole is defined as a specific number of particles. B) O2 has the largest number of molecules. C) H2 has the largest number of molecules. ) Calculate the molar mass of the following compound: hydrogen fluoride, HF A) 1.01 g/mol B) 19.00 g/mol C) 20.01 g/mol
Transcribed Image Text:O How many neutrons are in carbon-12 ? A) 7 B) 8 C) 6 O Identify the chalcogen that has 18 neutrons in the nucleus. A) sulfur-32 B) sulfur-34 C) sulfur-33 ) What's the mass number of carbon-14 ? В) 8 A) 6 C) 14 ) What's the atomic number of sulfur-34 ? A) 34 B) 18 C) 16 ) In the formula of hydroxylapatite Ca,o(PO4)6(OH)2 determine the number of each kind of atom, Ca, O, H, P: A) Са — 10; О -8;B Н — 2; Р - 6 с) Са — 10; О — 12;B Н — 2;B Р - 6 B) Ca – 10; O – 26; H – 2; P - 6 D) Ca – 10; O – 26; H – 2; P - 1 ) Which element is represented by the chemical symbol TI ? A) tantalum B) thorium C) thallium ) The fact that water is 11.2 % hydroen and 88.8 % oxygen by mass regardless of its origin is an example of A) Dalton's atomic theory B) law of conservation of mass C) law of definite proportions ) Write the empirical formulas for the following compound: A) C,H¿O2 B) CH,O C) C2H,0 ) Write a sentence that describes how to determine the number of moles of a compound in a known mass of the compound if we know its molecular formula. A) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the molar mass of the compound by the mass of compound. B) Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound C) Use the molecular formula to find the molar mass; to obtain the number of moles, multiply the mass of the molar mass of the compound. compound with the molar mass of the compound. ) Compare 1 mole of H 1 mole of O, and 1 mole of F, Which has the largest number of molecules? Which has the greatest mass? A) All three have the same number of molecules, since a mole is defined as a specific number of particles. B) O2 has the largest number of molecules. C) H2 has the largest number of molecules. ) Calculate the molar mass of the following compound: hydrogen fluoride, HF A) 1.01 g/mol B) 19.00 g/mol C) 20.01 g/mol
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