1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jarptica [38.1K]
3 years ago
12

A student placed 11.5 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then

carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 25.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
Chemistry
1 answer:
masha68 [24]3 years ago
6 0

Answer:

The mass of glucose in 100 mL of final solution: <u>w₂ =0.5747 g</u>

Explanation:

Given: Mass of glucose: w₁ = 11.5 g, Volume of solution 1: V₁ =100 mL,  Volume of solution 2: V₂ = 0.5 L = 0.5 × 100 = 500 mL, Mass of glucose: w₂ = ? g

Molar mass of glucose; m = 180.16 g/mol

As, Molarity = (given mass × 1000) ÷ (molar mass × volume of solution in mL)

<u>Molarity of glucose solution 1</u>: M₁ = (w₁ × 1000) ÷ (m × V₁) = (11.5 g × 1000) ÷ (180.16 g/mol × 100 mL) = 0.638 M

<u>Dilution of 25.0 mL 0.638 M solution to 500 mL:</u>

According to the Dilution equation: M₁ × V₁ = M₂ × V₂

0.638 M × 25 mL = M₂ × 500 mL

M₂ = 0.638 M × 25 mL ÷ 500 mL

M₂ = 0.0319 M

Molarity of glucose solution 2: M₂ = 0.0319 M = (w₂ × 1000) ÷ (m × V₂)

⇒ <u>mass of glucose: w₂</u> = (M₂ × m × V₂) ÷ (1000)

⇒ w₂ = (0.0319 M × 180.16 g/mol × 100) ÷ (1000) = <u>0.5747 g</u>

<u />

<u>Therefore, the mass of glucose in 100 mL of final solution: w₂ =0.5747 g</u>

You might be interested in
Please help thank you
Fynjy0 [20]

Answer:

D

Explanation:

8 0
3 years ago
What will happen to a test dummy during a crash test if its seatbelt is not buckled? The test dummy will stop when the car stops
creativ13 [48]
<span>The test dummy will continue forward until it makes contact with another object.</span>
7 0
3 years ago
Read 2 more answers
Give an example of a balanced force.
lutik1710 [3]

Answer:

When two forces are the same strength but act in opposite direction, they are called balanced forces. Again, tug-of-war is a perfect example. If the people on each side of the rope are pulling with the same strength, but in the opposite direction, the forces are balanced. The result is no motion.

Explanation:

Hope this helps!

7 0
3 years ago
Read 2 more answers
4. How many moles of gold (Au) are in a pure gold nugget having a mass of 25.0 grams.
ikadub [295]
<h3>Answer:</h3>

0.127 mol Au

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table
  • Moles

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 25.0 g Au

[Solve] moles Au

<u>Step 2: Identify Conversions</u>

[PT] Molar Mass of Au - 196.97 g/mol

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                     \displaystyle 25.0 \ g \ Au(\frac{1 \ mol \ Au}{196.97 \ g \ Au})
  2. [DA] Multiply/Divide [Cancel out units:                                                          \displaystyle 0.126923 \ mol \ Au

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.126923 mol Au ≈ 0.127 mol Au

3 0
3 years ago
Read 2 more answers
Intermolecular forces dipole differences london dispersion
loris [4]
33233728793278237876548742787874578378572098-2932-=93788784787489
8 0
3 years ago
Other questions:
  • Dr. Hakoda is studying tsunamis—large waves that can reach heights of 1,700 feet. Tsunamis are often caused when large chunks of
    8·2 answers
  • Mass of NaHCO3 sample (g): 1.20 g
    12·1 answer
  • Sulfuric acid is essential to dozens of important industries from steelmaking to plastics and pharmaceuticals. More sulfuric aci
    8·1 answer
  • 2. Randy has a 500 g of water at 20°C. If he wants the final temperature of the water to be 75°C (the change in temperature will
    10·1 answer
  • How does the diaphragm aide in breathing?
    9·2 answers
  • What would be the freezing point of a 1.7 mole aqueous ethylene glycol solution? The freezing point depression constant for wate
    9·1 answer
  • Please Help with what you can and try 8 if possible
    13·1 answer
  • Which equation shows how to calculate how many grams (g) of KOH would be needed to fully react with 4 mol Mg(OH)2? The balanced
    6·2 answers
  • URGENTTTTT What is the correct formula when Al+3 combines with CrO4-2
    15·1 answer
  • How does gravity affect the rain during a rainstorm?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!