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Answer:
B. 11.18 mols of Cu
Explanation:
Given parameters:
Number of particles in Cu = 6.73 x 10²⁴ particles
Unknown:
Number of moles = ?
Solution:
A mole of a substance is known to contain the Avogadro's number of particles. To solve this problem;
6.02 x 10²³ particles is contained in 1 mole of a substance
6.73 x 10²⁴ particles will be contained in [tex]\frac{6.73 x 10^{24} }{6.02 x 10^{23} }[/tex] = 11.18moles of Cu
Explanation:
Purpose and Theory: A tablet of vitamin C contains the active ingredient called ascorbic acid (HC,H,0.).
Ascorbic acid is an organic acid which is a white power and is soluble in water.
In the following microtitration lab you will be grinding up a vitamin C tablet
, and using a 0.10 g sample of the
vitamin C powder, which will be dissolved in 20-40 mL of water. This solution will be used to determine the
quantity of ascorbic acid in a commercial vitamin C tablet.
Groups
Lab 2
# of Drops 1 or Drops 2 of Drops 3
96
91
94
Hadia
Data & Analysis:
Complete the missing information in the following data table [24]
1
2
3
Trial
Volume of NaOH (drops)
0 05mL drop
(NaOH (O 0050mol/L)
Volume of NaOH (ML)
Average Volume of NaOH (ml)
T I
O 0050
00050
00050
The balanced chemical reaction between ascorbic acid and sodium hydroxide is:
HC,H,O + NaOH NaC,H,Oye H,O,
1. Stoichiometrically calculate the mass (in grams) of ascorbic acid in the powdered sample.