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
-BARSIC- [3]
3 years ago
12

A student calculated the molarity of a solution prepared by dissolving 0.730 mol of table sugar (sucrose, C12H22O11) in 1.8x10^3

mL of water as 4.06x10^-4 M C12H22O11.
Explain the student's calculation error and explain how the student should solve for the correct value of molarity. Show a valid calculation for the molarity.

II. The student then takes a 1.00 M stock solution of table sugar (sucrose, C12H22O11) and mixes 0.305 L of stock solution with additional distilled water to create a dilute solution with a total volume of 1.25 L.

Explain how the student can determine the molarity of the resulting solution. Show a valid calculation for the final molarity. PLS HELP I'M TAKING MY EXAM NOW!!!!!
Chemistry
1 answer:
lara31 [8.8K]3 years ago
5 0

Answer: C= 0.406 M

Explanation:

Solution.

ν

=

0.730

m

o

l

;

ν=0.730mol;

V

=

1.8

⋅

1

0

3

m

L

=

1.8

L

;

V=1.8⋅10

3 mL=1.8L;

C=0.730mol

1.8 L=0.406 M

C= 1.8L

0.730mol =0.406M

The student made a mistake because he did not convert a unit of volume from milliliters to liters. After all, molarity is defined as the number of moles of solute per liter of solution.

You might be interested in
What is the correct reaction for the dissociation (ionization) for a weak acid?
slava [35]

Answer: HA + H2O ⇌ H3O+ + H- (option #4)

Explanation: Since the acid is weak you have to use a ⇌ (equilibrium) sign. Equilibrium is denoted in a chemical equation by the ⇌ symbol. Also, when any acid dissolves into water, it produces hydronium (H3O+ or H+). Therefore, the fourth chemical reaction is your answer.

7 0
3 years ago
PLEASE HELP!!! Just need an answer, no explanation
Alex

Answer: N2

blah blah blah blah blah blah

6 0
3 years ago
Read 2 more answers
The ___________ energy in a mechanical system is determined by adding the potential and kinetic energy together
Anna35 [415]
I think its 

<span>The Mechanical energy in a mechanical system is determined by adding the potential and kinetic energy together. </span>

6 0
3 years ago
Read 2 more answers
1.00 L of a gas at STP is compressed to 473mL. What is the new pressure of gas?
Ratling [72]

Hello!

1.00 L of a gas at STP is compressed to 473 mL. What is the new pressure of gas?

  • <u><em>We have the following data:</em></u>

Vo (initial volume) = 1.00 L  

V (final volume) = 473 mL → 0.473 L  

Po (initial pressure) = 1 atm (pressure exerted by the atmosphere - in STP)  

P (final pressure) = ? (in atm)

  • <u><em>We have an isothermal transformation, that is, its temperature remains constant, if the volume of the gas in the container decreases, so its pressure increases. Applying the data to the equation Boyle-Mariotte, we have:</em></u>

P_0*V_0 = P*V

1*1 = P*0.473

1 = 0.473\:P

0.473\:P = 1

P = \dfrac{1}{0.473}

\boxed{\boxed{P \approx 2.11\:atm}}\:\:\:\:\:\:\bf\green{\checkmark}

<u><em>Answer:  </em></u>

<u><em>The new pressure of the gas is 2.11 atm  </em></u>

___________________________________

\bf\blue{I\:Hope\:this\:helps,\:greetings ...\:Dexteright02!}\:\:\ddot{\smile}

3 0
3 years ago
How much concentrated 18M sulfuric acid is needed to prepare 250mL of a 6.0M solution?
slavikrds [6]
C₁ * V₁ = C₂ * V₂ 

18 * V₁ = 6.0 * 250

18 V₁ = 1500

V₁ = 1500 / 18

V₁ = 83.33 mL

hope this helps!


5 0
3 years ago
Other questions:
  • What type of wave moves the audio and visual signals?
    15·1 answer
  • #NEEDHELPASAP #MARINESCIENCE
    5·1 answer
  • 1 where does drinking water come<br> from? How might it become<br> polluted or contaminated?
    15·1 answer
  • How many times faster will oxygen gas diffuse than carbon dioxide
    10·1 answer
  • What information would b requird to determine the mass of nitrogen (n)?
    13·1 answer
  • When an object such as a rock is dropped into water it disturbs the surface of the water waves form at the surface of the water
    11·1 answer
  • Which word part means cold?<br> crylo<br> chem/<br> cis/o<br> cyan/
    9·1 answer
  • Which are precautions to take when working with heat and fire? Check all that apply.
    6·1 answer
  • A nugget of gold with a mass of 521 g is added to 50.0 mL of water. The water level rises to a volume of 77.0 mL. What is the de
    5·1 answer
  • Potassium-40 has a half-life of approximately 1.25 billion years. approximately how many years will pass before a sample of pota
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!