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
olga_2 [115]
4 years ago
7

A base has a molarity of 1.5 M with respect to the hydroxyl ion (OH-) concentration. If 7.35 cm³ of this base is taken and dilut

ed to 147 cm³, then what is the concentration of the hydroxyl ion. How many moles of hydroxyl ion are there in the 7.35 cm³? In the 147 cm³?
Chemistry
1 answer:
lubasha [3.4K]4 years ago
3 0

Answer:

0.077M is the concentration of the hydroxyl ion

Explanation:

If 7.35 cm3 of this base is take and diluted to 147 cm3, then what is the concentration of the hydroxyl ion?

Use the dilution equation:

M1V1 = M2V2

M1 * 147cm³ = 1.5 M * 7.35 cm³

M1 = 1.5 M * 7.35 cm³ / 147 cm³

M1 = 0.077 M

<h3> 0.077M is the concentration of the hydroxyl ion</h3>

How many moles of hydroxyl ion are there in the 7.35 cm3?

1000 cm³ contains 1.5 mol OH- ions

7.35 cm³ contains : 7.35 cm³ / 1000 cm³ *1.5 mol

= 0.011025 mol

<h3>Answer correct to 2 significant digits = 0.011 mol OH- ions.</h3>
You might be interested in
A 50 kg skater pushed by a friend accelerates 5 m/sec2. How much force did the friend apply?
DENIUS [597]

Answer:

\underline{ \boxed{f = 250 \: N}}

Explanation:

since \: force \ \: :  \underline{ \boxed{f = ma}} \\ f = 50 \times 5 \\ \underline{ f = 250 \: N}

♨Rage♨

5 0
3 years ago
Formal charge of Cl in CHCl3
Vsevolod [243]
FC(C) = 4 - 0.5*8 - 0 = 0) FC(Cl) = 7 - 0.5*2 - 6 = 0
6 0
3 years ago
Give the structure of the product obtained when cyclopropene loses a proton. Will the product be aromatic or not?
astra-53 [7]

Answer:

not aromatic

Explanation:

Cyclopropene -

as the compound is is made to lose a proton , and gains a negative charge on its ring ,

Now, The ring can become aromatic or anti - aromatic depending on the number of π electrobns ,

According to Huckel 's rule ,

The cyclic compounds with ( 4n+2 ) π electrons , where , n = 0, 1, 2, 3 ... , are considered to be aromatic in nature ,

And the cyclic compounds with ( 4n ) π electrons , where , n = 1, 2, 3 ... , are considered to be anti - aromatic in nature.

Now, for the cyclopropene structure , the number of π electron are equal to 4 , 2 from the double bond and 2 from the negative charge .

Therefore , the compound becomes not aromatic or anti - aromatic .

3 0
3 years ago
When would it be most appropriate to use ppm to describe the concentration of the solutes in a solution?
cluponka [151]

B) When describing very dilute solutions.

Explanation:

The most appropriate time to use ppm is when describing dilute concentrations of solutes in solutions. It is used mostly to determine trace amount of elements in water and soils.

  • The part per million ppm is the amount of miligram of a solute in a liter of solution.
  • It is similar to percentage.
  • Minute and trace concentrations are very difficult to work with.
  • Using parts per million, they become better appreciated and easy to use.

Learn more:

Parts per million brainly.com/question/2854033

#learnwithBrainly

5 0
4 years ago
Submit your chart and write a paragraph describing the energy conversions you researched. Remember to proofread your work before
topjm [15]

Answer:

1. Click here to access an interactive simulation where you will explore the transfer and transformations of different types of energy that you have learned about in this lesson.

2. Click the systems box, and then select the energy symbols box. This will allow you to see the movement of energy and its type in the system.

3. Under the bike the person is riding, drag the blue rectangle to the right to start the system.

4. The chemical energy in the person's body is transformed into  

✔ mechanical energy

when they peddle the bike, causing the generator to rotate. Some energy in the bike wheel is lost to  

✔ thermal energy

. The generator produces electricity, which heats the water, causing it to produce thermal energy in the form of steam. When the person's chemical energy runs out, how do you replenish it?  

✔ by feeding them food

5. Change the initial energy source to sun, the intermediate energy source to the solar panel, and the final energy source to the windmill. In this system,  

✔ light energy

is produced from the sun and transformed into electricity in the solar panel. Both of these types of energy are considered forms of  

✔ electromagnetic energy

. The result of this system is that the windmill produces mechanical energy.

6. Try a few more scenarios, choosing different initial, intermediate, and final energy sources. Observe places where energy is transformed and lost. Creating systems with the least amount of energy is important in engineering design.

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Write a plan explained how you can reduce small you may want to include a timeline or flow chart show the steps of the plan in t
    11·1 answer
  • An isotope undergoes radioactive decay. The new isotope that forms has an atomic number that is 2 less than the original isotope
    11·2 answers
  • The law of conservation of mass states that the mass of the ________ will equal the mass of the products in a closed system.
    6·1 answer
  • A certain material has a density of 0.2 g/ml. Is this material good for building a bridge or for making a cushion for a couch
    6·1 answer
  • A rigid cylinder with a movable piston contains 50.0 liters of a gas at 30.0 degree C with a pressure of 1.00 atmosphere. What i
    11·2 answers
  • What characteristic of an element shown on the periodic table can help you to predict its melting point
    12·1 answer
  • Is the max number of valance electrons in an atom 8 or less ?
    12·1 answer
  • Calculate the amount of heat needed to melt 89.9 g of solid methanol (CH3OH) and bring it to a temperature of 49.1C.
    11·1 answer
  • You have two containers. The first container contains 22.99 grams of solid
    5·1 answer
  • What is the frequency of light?<br>( I just want to confirm )​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!