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
LiRa [457]
3 years ago
12

How many moles of kf are contained in 244 ml of 0.135 m kf solution? the density of the solution is 1.22 g/ml?

Chemistry
2 answers:
galben [10]3 years ago
6 0
The Molarity of a solution = number of moles / volume.  
Volume = 244ml = 0.244L
 So it follows that number of moles = Molarity * volume 
 Number of moles = 0.135 * 0.244 = 0.03945.
 Hence the number of moles = 0.03945
Ivanshal [37]3 years ago
6 0

\boxed{0.03294\;{\text{mol}}} of KF are contained in 244 mL of 0.135 M KF solution.

Further Explanation:

The proportion of any substance in the mixture is termed as its concentration. Various concentration terms are used to find out the concentrations of substances. Some of the concentration terms are listed below:

1. Molality (m)

2. Mole fraction (X)

3. Molarity (M)

4. Parts per million (ppm)

5. Mass percent ((w/w) %)

6. Volume percent ((v/v) %)

Molarity is defined as the amount of solute that is dissolved in one liter of the solution. It is denoted by M and its unit is mol/L.

The expression for molarity of the solution is as follows:

{\text{Molarity of solution}} = \dfrac{{{\text{Amount}}\left( {{\text{mol}}} \right){\text{of solute}}}}{{\;{\text{volume}}\left( {\text{L}} \right)\;{\text{of solution}}}}     ...... (1)                                

Rearrange equation (1) to calculate the amount of solute.

{\text{Amount of solute}} = \left( {{\text{Molarity of solution}}} \right)\left( {{\text{Volume}}\;{\text{of}}\;{\text{solution}}} \right)   …… (2)                    

The volume of the solution is first converted from mL to L. The conversion factor for this is,

{\text{1 mL}} = {10^{ - 3}}\;{\text{L}}

So the volume of the solution can be calculated as follows:

\begin{aligned}{\text{Volume of solution}}&= \left({{\text{244 mL}}} \right)\left( {\frac{{{{10}^{ - 3}}\;{\text{L}}}}{{{\text{1}}\;{\text{mL}}}}} \right)\\&= 0.244{\text{ L}}\\\end{aligned}

The molarity of the solution is 0.135 M.

The volume of the solution is 0.244 L.

Substitute these values in equation (2) to calculate the amount of KF.

 \begin{aligned}{\text{Amount of KF}} &= \left( {0.135{\text{ M}}} \right)\left( {0.244{\text{ L}}} \right)\\&= 0.03294\;{\text{mol}}\\\end{aligned}

Therefore 0.03294 moles of KF are present in the given solution.

Learn more:

  1. Determine the given mass of solute: brainly.com/question/2847466
  2. Determine the moles of water produced: brainly.com/question/1405182

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Concentration terms

Keywords: KF, 0.03294 mol, 0.135 M, 244 mL, 0.244 L, molarity, volume, amount of solute, conversion factor, concentration, concentration terms, molality, mole fraction, mol/L.

You might be interested in
Metamorphic rocks that melt in a holt fluid can recystallize into a different form of rock
kotykmax [81]
I think that type of rock is call Igneous rock because the igneous rock is molten rock from volcanoes. 
7 0
3 years ago
12. How much mass is in a 3.25-mole sample of NH 4 OH? A. 10.8 g B. 34.0 g C. 35.1 g D. 114 g
Galina-37 [17]

Answer:

D. 114 g

Explanation:

  • NH4OH molecular weight. Molar mass of NH4OH = 35.0458 g/mol This compound is also known as Ammonium Hydroxide.
  • Convert grams NH4OH to moles or moles NH4OH to grams. Molecular weight calculation: 14.0067 + 1.00794*4 + 15.9994 + 1.00794.
8 0
3 years ago
When heat is applied to 80 grams of CaCO3, it yields 39 grams of B. Determine the percentage of the yield.
EleoNora [17]

The question is incomplete, the complete question is:

When heat is applied to 80 grams of CaCO3, it yields 39 grams of CaO Determine the percentage of the yield.

CaCO3→CaO + CO2

<u>Answer:</u> The % yield of the product is 87.05 %

<u>Explanation:</u>

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

We are given:

Given mass of CaCO_3 = 80 g

Molar mass of CaCO_3 = 100 g/mol

Putting values in equation 1, we get:

\text{Moles of }CaCO_3=\frac{80g}{100g/mol}=0.8mol

For the given chemical reaction:

CaCO_3\rightarrow CaO+CO_2

By stoichiometry of the reaction:

If 1 mole of CaCO_3 produces 1 mole of CaO

So, 0.8 moles of CaCO_3 will produce = \frac{1}{1}\times 0.8=0.8mol of CaO

We know, molar mass of CaO = 56 g/mol

Putting values in above equation, we get:

\text{Mass of CaO}=(0.8mol\times 56g/mol)=44.8g

The percent yield of a reaction is calculated by using an equation:

\% \text{yield}=\frac{\text{Actual value}}{\text{Theoretical value}}\times 100 ......(2)

Given values:

Actual value of the product = 39 g

Theoretical value of the product = 44.8 g

Plugging values in equation 2:

\% \text{yield}=\frac{39 g}{44.8g}\times 100\\\\\% \text{yield}=87.05\%

Hence, the % yield of the product is 87.05 %

6 0
3 years ago
WHATS THE DIFFERENCE BETWEEN Fe AND FE2+
Grace [21]

Answer:

Fe is just the shortened version of Iron whereas Fe2+ is a positive ion,cation to be more specific

4 0
3 years ago
Sodium thiosulfate, na2s2o3, is used as a "fixer" in black and white photography. identify the reducing agent in the reaction of
aev [14]
Answer is: reducin agent in this reaction is thiosulfate (S₂O₃²⁻).
Balanced chemical reaction: 2S₂O₃²⁻(aq) + I₂(aq) → S₄O₆²⁻(aq) + 2I⁻<span>(aq).
Reducing agent is element or compound who loose electrons in chemical reaction. Sulfur in </span>thiosulfate change oxidation number from +2 to +5 tetrathionate anion (two<span> sulfur </span>atoms in the ion have oxidation state<span> 0 and two atoms have oxidation state +5).</span>
8 0
3 years ago
Other questions:
  • A bomb calorimeter with a heat capacity of 837 J∘C contains 745 g of water. It burns 2.50 g C8H18 resulting in the temperature g
    14·1 answer
  • A flask at room temperature contains exactly equal amounts (moles of nitrogen and oxygen.
    5·1 answer
  • the elements silicon (atomic number 14) and chlorine (atomic number 17) are both in period 3 of the periodic table. which is mor
    12·2 answers
  • According to one acid base theory a base is an 1, h2 acceptor 2, h2 donor 3, h+ acceptor 4,h+ donor
    13·1 answer
  • Which body of water will have a greater influence on an area?
    12·1 answer
  • A student mixes a white solid and a clear liquid together. The solid dissolves into the liquid is evidence of a chemical reactio
    11·1 answer
  • Determine whether you can swim in 1.00 x 10^27 molecules of water.​
    7·1 answer
  • The empirical formula for a hydrocarbon is found to be CH₂. In a separate experiment, the molar mass is determined to be approxi
    14·1 answer
  • Who is all bor.ed bc im bor.ed who wan.na talk UwU
    13·2 answers
  • Which of the following conversion factors would be used to calculate the number of moles of Cl2 produced if 11 moles of HCl were
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!