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
stira [4]
3 years ago
9

What volume of 1.25M HCl would be required to prepare 180 mL of a 0.500M HCl solution? A. 2.2 x 103 mL B. 450 mL C. 72 mL D. 0.0

14 mL
Chemistry
1 answer:
OverLord2011 [107]3 years ago
4 0

To solve this we use the dilution equation used in chemistry, 

M1 V1 = M2 V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

M1 V1 = M2 V2

1.25 M x V1 = 0.500 M x 180 mL

<span>V1 =72 mL of the concentrated solution</span>

<span>Therefore, the correct answer would be option C.</span>

You might be interested in
Why is refraction so important in eyeglasses.
miss Akunina [59]
It helps our eyes to see better. For example: If you can't read a book because you see that is blurry, you might need glasses to see it much clearer
7 0
3 years ago
What coefficients are needed to balance the equation for the complete combustion of methane? enter the coefficients in the order
Art [367]

The coefficients in the order CH₄, O₂, CO₂, and H₂O, are 1,2,1,2

The equation becomes:

CH₄ (g) + 2O₂ (g) -> CO₂ (g) + 2H₂0 (g)

<h3><em>Further explanation</em></h3>

Complete combustion of hydrocarbon with oxygen will be obtained by CO₂ and H₂O compounds.

If O is insufficient there will be incomplete combustion produced by CO and H and O

Hydrocarbon combustion reactions (specifically alkanes)

\large {\boxed {\bold {C_nH _ (_2_n _ + _ 2_) + \frac {3n + 1} {2} O_2 ----> nCO_2 + (n + 1) H_2O}}}

Equalization of chemical reaction equations can be done using variables.

Steps in equalizing the reaction equation:

  • 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c etc.
  • 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index between reactant and product
  • 3. Select the coefficient of the substance with the most complex chemical formula equal to 1

For gas combustion reaction which is a reaction of hydrocarbons with oxygen produces CO₂ and H₂O (water vapor). can use steps:

Balancing C atoms, H and last atoms O atoms

Methana combustion reaction

CH₄ (g) + O₂ (g) -> CO₂ (g) + H₂0 (g)

We give the most complex compounds, namely Methane, we give the number 1

So the reaction becomes

CH₄ (g) + aO₂ (g) -> bCO₂ (g) + cH₂0 (g)

C atom on the left 1, right b, so b = 1

H atom on the left 4, right 2c, so 2c = 4 ---> c = 2

Atom O on the left 2a, right 2b + c, so 2a = 2b + c

2a = 2.1 + 2

2a = 4

a = 2

The equation becomes:

CH₄ (g) + 2O₂ (g) -> CO₂ (g) + 2H₂0 (g)

<h3><em>Learn more</em></h3>

the combustion of octane in gasoline

brainly.com/question/8175791

brainly.com/question/897044

hydrogen and excess oxygen

brainly.com/question/1405182

Keywords: methane, combustion, hydrocarbons, equalization of reaction equations

3 0
3 years ago
Read 2 more answers
*TIMED PLEASE HELP!*
EleoNora [17]

This is the actual answer

1

2

4

3

7 0
3 years ago
Read 2 more answers
What happens to temperature as you raise the pressure?
Wittaler [7]

Answer:

hey there

Your temp would increase

7 0
3 years ago
Suppose that the average speed (vrms) of carbon dioxide molecules (molar mass 44.0 g/mol) in a flame is found to be 1.90 105 m/s
alina1380 [7]
To determine the temperature of the gas, we need an expression which would relate the average speed of the molecules of the gas and the temperature. From my readings, it is said that the average kinetic energy ( energy of an object in motion) of the molecules of a gas is directly related to the temperature of the gas system. Since velocity or speed is directly related to kinetic  energy, it should be that temperature is directly related to the average speed. The expression would be:

<span>v^2 = 3RT/M 
</span>(1.90x10^5)^2 = [3(8.314)T] / [44.0(1/1000)]
T = 63683746.3 K

The temperature would be 
63683746.3 K.
5 0
3 years ago
Other questions:
  • How many oxygen atoms are there in 6.00 g of sodium dichromate, na2cr2o7?
    5·1 answer
  • What is the total mass of three gold bars that weigh 5543 mg, 23.45 mg, and 697.4 mg?
    6·1 answer
  • (PLEASE HELP will give first correct answer brainliest!!) Which option correctly describes glucose catabolism?
    11·2 answers
  • Rank these oligonucleotides according to distance traveled in an electrophoretic separation
    10·1 answer
  • If 2 acid have ph value 3 and 5 respectively, which will be more acidic? Why?​
    9·1 answer
  • How many atoms are present in 3 moles of chromium?
    10·2 answers
  • 35. Explain what the Triple Point is and why the Triple
    12·2 answers
  • Using the image below, describe in at least 2 paragraphs, what is happening with the arrows. Name and explain the processes and
    14·1 answer
  • Which statments are true about balancing chemical reactions?
    7·1 answer
  • Convert from grams to moles for 36g CO2
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!