Academic Excellence. Yours.
2. Solid Sodium and chlorine gas react to produce solid sodium chloride:
a. How many moles of chlorine gas (Cl2) would react with 5.0 moles of sodium (Na)?
Per Equation or Theoretically
|2 moles||1 mole|
|Actual||5 moles||x mole?|
2/5 = 1/x; 2x = 5; x = 2.5 moles, Answer.
b. Determine the mass of NaCl that can be produced from 24.7 g Na.
|Per Equation or Theoretically||2 x 22.99 = 45.98 g||2 x (22.99 + 35.45)g = 116.88 g|
45.98/24.7 = 116.88/x; x = 62.8 g, Answer
c. How many molecules of Cl2 would be needed to react with 24.7 g Na?
|Per Equation or theoretically||45.98 g||6.02 x 10^23 molecules|
45.98/24.7 = 6.02 x 10^23 / x; x = 3.24 x 10^23 molecules, Answer
a. If 27.3 g of C8H18 are burned, what mass of water will be produced?
|Per Equation or theoretically|
= 228 g
228/27.3 = 324/x; x = 324x27.3/228 = 38.7 g of H2O, Answer
b. How many molecules of CO2 will be produced, using the same given quantity from part a?
|Per Equation or theoretically||228 g||16 x 6.02 x 10^23 molecules|
228/27.3 = 16x6.02x10^23/x; x = 1.15 x 10^24 molecules of CO2, Answer
c. What volume of CO2 gas is produced, using the same quantity from part a (at STP)?
|Per Equation or theoretically||228 g||16 x 22.4 L|
228/27.3 = 16x22.4/x; x = 42.9 L of CO2, Answer