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
blagie [28]
2 years ago
5

The instructions for the experiment direct you to prepare 30 mL of 1.5 M HCl solution. In the chemical closet, you locate an 18M

stock solution of HCl. What volume of the 18M HCl is needed to make the solution?
Chemistry
1 answer:
MAVERICK [17]2 years ago
6 0

The volume of the 18M HCl needed to make the solution will be 2.5 mL.

<h3>Dilution</h3>

According to the dilution principle, the number of moles of solutes in a solution before and after dilution must remain the same.

Since, mole = molarity x volume

Thus, molarity x volume before dilution = molarity x volume after dilution.

Mathematically, the equation is written as: m1v1 = m2v2

In this case, m1 = 18 M, m2 = 1.5 M, and v2 = 30 mL.

What we are looking for is v1, the amount of the stock HCl needed for dilution.

v1 = m2v2/m1 = 1.5 x 30/18 = 2.5 mL.

Thus, 2.5 mL of the stock HCl would be needed.

More on dilution can be found here: brainly.com/question/21323871

#SPJ1

You might be interested in
Calcula el %m/v de alcohol en una mezcla utilizada para la desinfección de manos formada por: 15 ml de agua (densidad=1g/ml), 10
mr Goodwill [35]

Answer:

%m/v =70%

Explanation:

El %m/v es una unidad de concentración que se define como cien veces la división entre la masa de una sustancia (En gramos) y el volumen total en el que esta sustancia se encuentra (en mL).

En el problema, debemos hallar la masa de etanol (Alcohol) y el volumen total de la solución.

<em>Masa alcohol: </em>

Ya te la dan en el problema: 105g

<em>Volumen solución:</em>

Volumen agua: 15mL

Volumen etanol: 105g × (1mL / 0.798g) = 131mL

Volumen Jabón líquido: 4.5g × (1mL / 1.5g) = 3mL

Volumen: 15mL + 131mL + 3mL

149mL

Así, el %m/v de alcohol en la solución es:

%m/v = (105g / 149mL) × 100

<h3>%m/v =70%</h3>

3 0
3 years ago
PLEASE NO GUESSES OR INCORRECT ANSWERS
sertanlavr [38]
Diffusion is the movement of any chemical from one place to another. 
Osmosis is the movement of water across a partially permeable membrane.


I hope this helps!
3 0
3 years ago
Why do we use conversion factors instead of just multiplying or dividing as needed? What’s the advantage?
Scrat [10]
If you’re referring to stoichiometry, which usually involves the long t-tables of multiple conversions, then you’re not alone in wondering the purpose of using them. The purpose of conversion tables is to help keep track of what you’re doing. When quickly converting one value to another, it’s very easy to forget a particular piece to the puzzle, or to use a factor that doesn’t work for that instance. Teachers usually draw out a t-table every time they work a problem so as not to confuse students, but anytime you’re working with funky units or converting across systems (metric to imperial and vice versa) it’s a good idea to use them.
4 0
3 years ago
What do you often notice after you balance a hydrocarbon combustion
Ivanshal [37]

Answer:

A. Sometimes the coefficient for the oxygen molecule is not a whole number

Explanation:

8 0
3 years ago
Read 2 more answers
One type of electromagnetic radiation has a frequency of 107.1MHz,another type has wavelength of of 2.12x10^-10 m,and another ty
Andreas93 [3]

Each type of electromagnetic radiation and placed in order of increasing photon energy and increasing frequency

  • FM Radio waves < Visible light < X - rays
  • Order of increasing frequency.
  • FM Radio waves < Visible light < X - rays

This is further explained below.

<h3>What is electromagnetic radiation?</h3>

Parameters

Frequency =107 100 000 hertz

Wavelength, λ = c / ν => 2.8 m => 2.12 * 10-10 m

Energy = 3.97 * 10 -19 J/ photon.

Generally, the equation for Wavelength is  mathematically given as

λ = h c / E

Therefore

λ =6.626 * 10-34  * 3 * 108  / (3.97* 10 -19 J)

λ =5 * 10-7 m

In conclusion, This is considered to be part of the viewable area (green Increasing photon energy from lowest to highest.

  • FM Radio waves < Visible light < X - rays
  • Order of increasing frequency.
  • FM Radio waves < Visible light < X - rays

Read more about electromagnetic radiation

brainly.com/question/11895806

#SPJ1

5 0
1 year ago
Other questions:
  • A car driving east along the freeway at 60 m/s hits some traffic and after 7 seconds is
    9·1 answer
  • How many moles of PCl3 are produced if 5 moles of P4 reacted with 22 moles of Cl2
    14·1 answer
  • Which element has an atomic number of 6? lithium boron carbon oxygen
    5·2 answers
  • Who knows this I need it
    8·1 answer
  • What is the main reason that cause the subduction process?
    8·1 answer
  • Based on how they obtain their food, fungi are _____. A plant-like B animal-like
    8·2 answers
  • What moon phase occurs on the 7th day of the lunar cycle?
    7·1 answer
  • Where do fossils live
    8·2 answers
  • 21. Which energy level has the lowest amount of energy?
    14·2 answers
  • What is the difference between ethanol and methanol.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!