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
ki77a [65]
3 years ago
9

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/

weight % or percent by mass of the solute? (I got 5.64% but it said it was incorrect, and I can't figure it out?)
Chemistry
1 answer:
lara31 [8.8K]3 years ago
8 0

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

<u>2.67%</u>

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

<u><em>You are calculating </em></u><u><em>weight /Volume</em></u><u><em> not weight/weight % or percent by mass of the solute</em></u>

Here the <u>weight/weight % or percent by mass</u> of the solute is asked : So first convert the<u> VOLUME OF SOLUTION into MASS</u>

Density of potassium nitrate in water KNO3 = 2.11 g/mL

density=\frac{mass}{volume}

Density = 2.11 g/mL

Volume of solution = 86.4 mL

2.11=\frac{mass}{86.4}

mass = 2.11\times 86.4

mass=182.3grams

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100

=\frac{4.87}{183.2}\times 100

w/w%=2.67%

You might be interested in
In a nuclear reactor, when the control rods are lowered between the fuel rods, they slow the fission reactions.
rosijanka [135]
True when the boron control rods are lowered it slows the reaction
5 0
3 years ago
Read 2 more answers
What is milk best described as? solution, suspension, compound, or colloid?
Debora [2.8K]
Milk is a complex colloidal system.
7 0
3 years ago
Define Saturated Solution. What happens as a saturates solution cools?
solong [7]

Saturated solution is a solution in which no more solute can be dissolved in the solvent. When saturated solution cools, the solution began precipitate from the solution, because under lower temperature, usually, less amount solute can be dissolved in the solvent.

8 0
3 years ago
Read 2 more answers
A couple is planning to have a child. The father -to-be has six fingers, a dominant trait. His genotype is Ff. His wife has five
Vinvika [58]
A. There’s not enough info
5 0
3 years ago
Type the correct answer in each box. In an atom, the first energy level can hold electrons. The second energy level can hold ele
Dimas [21]
1st energy level can hold 2 electrons
2nd energy level can hold 8 electrons
3rd energy level can hold 8 or 18 electrons
7 0
3 years ago
Read 2 more answers
Other questions:
  • How many covalent bonds does nitrogen form if each of its unpaired electrons participate in one bond?
    10·2 answers
  • A 25.0 ml sample of a 0.100 m solution of acetic acid is titrated with a 0.125 m solution of naoh. Calculate the ph of the titra
    5·1 answer
  • How many miles will a person run in a 10 kilometers race
    13·1 answer
  • Which property of water makes it helpful to use in car radiators?
    5·1 answer
  • What is required in order to determine wether or not an object moves
    6·1 answer
  • Suppose a 500.mL flask is filled with 0.40mol of N2 and 1.0mol of NO. The following reaction becomes possible:
    14·1 answer
  • 50 POINTS!!! DUMB ANSWERS WILL BE DELETED
    15·1 answer
  • This is my cookie &gt;:( you cannot have it
    10·1 answer
  • What is metallurgy?<br>​
    8·1 answer
  • Why is it important to know where a resource, that you're using, is renewable or nonrenewable?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!