Question 2 a sample of sodium chloride (nacl) has a mass of 16.55 g.

b) a sample of nacl (sodium chloride) has a mass of 16.55g. calculate the number of moles of na (sodium). calculate the number of moles of cl (chlorine). (hint; you can use your answer from part a as your starting point.) show your work and highlight your final answer.

c) a sample of nacl (sodium chloride) has a mass of 16.55g. calculate the number of atoms of na (sodium). calculate the number of atoms of cl (chlorine). (hint; you can use your answer from part b as your starting point.) show your work and highlight your final answer.

question 3 a sample of table sugar (sucrose, c12h22o11) has a mass of 5.432 g.

a) calculate the number of moles of c12h22o11 in the sample. show your work and highlight your final answer.

b) a sample of table sugar (sucrose, c12h22o11) has a mass of 5.432 g. calculate the number of moles carbon. calculate the number of moles hydrogen. calculate the number of moles oxygen. (hint: you can use your answer from part a as your starting point.) show your work and highlight your final answer.

c) a sample of table sugar (sucrose, c12h22o11) has a mass of 5.432 g. calculate the number of atoms carbon. calculate the number of atoms hydrogen. calculate the number of atoms oxygen. (hint: you can use your answer from part b as your starting point.) show your work and highlight your final answer.

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Question2

A)0.2832 moles NaCl

B) 0.2832 moles Na+ and 0.2832 moles Cl-

C) 1.7 * 10^23 Na+ atoms and 1.7 * 10^23 Cl- atoms

Question 3

A) 0.01587 moles sucrose

B) Number of moles carbon =  0.1904 moles C

Number of moles hydrogen = 0.3491 moles H

Number of moles oxygen = 0.1746 moles O

C) Number of atoms of carbon =  1.15 * 10^23 C atoms

Number of atoms of hydrogen = 2.1 * 10^23 H atoms

Number of atoms of oxygen = 1.05 *10^23 O atoms

Explanation:

Step 1: Data given

Molar mass of NaCl = 58.44 g/mol

A) Number of moles NaCl = 16.55 grams / 58.44 g/mol = 0.2832 moles NaCl

B) Calculate number of moles Na+ and number of moles Cl-

NaCl → Na+ + Cl-

For 1 mol NaCl we have 1 mol of Na+ and 1 mol of Cl-

For 0.2832 moles NaCl we have 0.2832 moles Na+ and 0.2832 moles Cl-

C) Calculate the number of atoms of Na+ and atoms of Cl-

Number of Na+ atoms = 6.022 * 10^23 / mol * 0.2832 moles = 1.7 * 10^23 Na+ atoms

Number of Cl - atoms = 6.022 * 10^23 / mol * 0.2832 moles = 1.7 * 10^23 Cl- atoms

Question 3

A) Calculate the number of moles of C12H22O11 in the sample.

Moles sucrose = mass / molar mass

Moles sucrose = 5.432 grams / 342.3 g/mol = 0.01587 moles

B) A sample of table sugar (sucrose, C12H22O11) has a mass of 5.432 g. Calculate the number of moles Carbon. Calculate the number of moles Hydrogen. Calculate the number of moles Oxygen.

In 1 mol C12H22O11 we have 12 moles of carbon, 22 moles of hydrogen and 11 moles of oxygen

Number of moles carbon = 12 * 0.01587 moles = 0.1904 moles C

Number of moles hydrogen = 22 * 0.01587 moles = 0.3491 moles H

Number of moles oxygen = 11 * 0.01587 = 0.1746 moles O

C)  A sample of table sugar (sucrose, C12H22O11) has a mass of 5.432 g. Calculate the number of atoms Carbon. Calculate the number of atoms Hydrogen. Calculate the number of atoms Oxygen.

Number of atoms of carbon = 6.022 *10^23 /mol *  0.1904 moles = 1.15 * 10^23 C atoms

Number of atoms of hydrogen = 6.022 * 10^23 / mol * 0.3491 moles = 2.1 * 10^23 H atoms

Number of atoms of oxygen = 6.022*10^23 / mol * 0.1746 moles = 1.05 *10^23 O atoms

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inspire others.

commitment and passion.

good communicator.

decision-making capabilities.

accountability.

delegation and empowerment.

creativity and innovation.

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