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
algol13
3 years ago
10

the student records the concentration of the stock solution of H2O2 to be 0.950 M. The student proceeds to prepare the reaction

solution as stated in Step 9: They add 10.0 mL of 0.10 M potassium iodide and 15.0 mL of distilled water to their flask. They then add 5.0 mL of the stock H2O2 solution and mix the solution to initiate the reaction. Calculate the molarity of I- in the initial reaction solution.
Chemistry
1 answer:
lana [24]3 years ago
6 0

Answer:

0.0400M of KI

Explanation:

Molarity is an unit of concentration defined as the ratio between moles of solute and liters of solution.

When you add 10.0 mL of 0.10M KI and 15.0mL, total volume is:

25.0mL = <em>0.025L of solution</em>

<em />

And moles of KI are:

0.0100L × 0.10M = <em>0.00100 moles of KI</em>

<em />

Thus, molarity is:

0.00100 moles / 0.025L = <em>0.0400M of KI</em>

You might be interested in
How many grams of NaOH are produced from 20.0 grams of Na2CO3?
natita [175]

Answer:

Hope this helps!

Explanation:

Ans: 15.1 grams

Given reaction:

Na2CO3 + Ca(OH)2 → 2NaOH + CaCO3

Mass of Na2CO3 = 20.0 g

Molar mass of Na2CO3 = 105.985 g/mol

# moles of Na2CO3 = 20/105.985 = 0.1887 moles

Based on the reaction stoichiometry: 1 mole of Na2CO3 produces 2 moles of NaOH

# moles of NaOH produced = 0.1887*2 = 0.3774 moles

Molar mass of NaOH = 22.989 + 15.999 + 1.008 = 39.996 g/mol

Mass of NaOH produced = 0.3774*39.996 = 15.09 grams

4 0
3 years ago
An atom of any element must contain
svetlana [45]
An atom of any element must contain "<span>(2) an equal number of protons and electrons" but it should be noted that atoms can borrow electrons from one another. </span>
4 0
3 years ago
Read 2 more answers
What is the mass percent of chlorine in chlorine flouride if 5.753g of chlorine and 9.248g of fluorine combine to create chorine
Delicious77 [7]

Answer:

4.254g

Explanation:

6 0
3 years ago
Read 2 more answers
What is the pressure inside a 2.0 L bottle filled with 0.25 mol of carbon dioxide gas at 25 °C?
motikmotik

Answer:

3.1atm

Explanation:

Given parameters:

Volume of gas = 2L

Number of moles  = 0.25mol

Temperature  = 25°C = 25 + 273  = 298K

Unknown:

Pressure of the gas = ?

Solution:

To solve this problem, we use the ideal gas equation.

This is given as;

       PV  = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas  constant  = 0.082atmdm³mol⁻¹K⁻¹

T is the temperature

          P  = \frac{nRT}{V}  

 Now insert the parameters and solve;

         P  = \frac{0.25 x 0.082 x 298}{2}   = 3.1atm

8 0
3 years ago
Tin has ten stable isotopes. The heaviest, 124Sn, makes up 5.80% of naturally occuring tin atoms. How many atoms of 124Sn are pr
matrenka [14]

The average atomic mass of Sn is 118.71 g/mol

the percentage of heaviest Sn is 5.80%

the given mass of Sn is 82g

The total  moles of Sn will be = mass / atomic mass = 82/118.71=0.691

Total atoms of Sn in 82g = 6.023X10^{23}X0.691=4.16X10^{23}

the percentage of heaviest Sn is 5.80%

So the total atoms of Sn^{124} = 5.80% X 4.16X10^{23}

Total atoms of Sn^{124}=2.41X10^{22} atoms

the mass of Sn^{124} will be = \frac{2.41X10^{22}X124}{6.023X10^{23}}=4.96g

5 0
3 years ago
Other questions:
  • An experimenter studying the oxidation of fatty acids in extracts of liver found that when palmitate (16:0) was provided as subs
    9·1 answer
  • What is an investigation that is controlled
    8·1 answer
  • What is the major driving force for losing a proton as the last step in an electrophilic aromatic substitution reaction?
    12·1 answer
  • Calculate the percentage composition of each element in calcium hydroxide
    6·1 answer
  • Which statement describes electromagnetic waves with wavelengths greater than 700 nanometers?
    9·2 answers
  • 4. define a tsunami
    10·2 answers
  • write the name of and molecular formula of compound which gives hydrogen ion and chloride ion in the solution state. in which co
    6·1 answer
  • In the diagram shown, what is occurring at the section marked 4?
    9·1 answer
  • What is the molar mass for Li2S?
    11·1 answer
  • What is the molarity of a solution made by adding :1.565 moles of PbN03 to 500 mL
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!