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
Whitepunk [10]
2 years ago
12

A 14.3 g sample of HF is dissolved into 250 mL of solution. The concentration of the solution is *

Chemistry
1 answer:
STALIN [3.7K]2 years ago
6 0

Answer:

The concentration of the solution is 2.86 M

Explanation:

Molarity is a unit of concentration based on the volume of a solution. It is defined as the number of moles of solute that are dissolved in a given volume. In other words, molarity is defined as the number of moles of solute per liter of solution.

The Molarity of a solution is determined by the following expression:

Molarity (M)=\frac{number of moles of solute}{Volume}

Molarity is expressed in units (\frac{moles}{liter}).

In this case, you must then know the number of moles of HF, for which you must know the molar mass. Being:

  • H: 1 g/mole
  • F: 19 g/mole

the molar mass of HF is: HF= 1 g/mole + 19 g/mole= 20 g/mole

Then the following rule of three applies: if 20 g of HF are available in 1 mole, 14.3 g in how many moles will they be?

moles=\frac{14.3 g*1 mole}{20 g}

moles= 0.715

So:

  • number of moles of solute: 0.715 moles
  • Volume: 250 mL=0.250 L (being 1 L=1000 mL)

Replacing:

Molarity=\frac{0.715 moles}{0.250 L}

Solving:

Molarity= 2.86 \frac{moler}{liter}=2.86 M

<u><em>The concentration of the solution is 2.86 M</em></u>

You might be interested in
What is biodiversity? I don't really understand...
Vesnalui [34]

Answer:

it is also know as biological diversity

Explanation:

it refers to the varieties or various forms of plants and animals species

4 0
3 years ago
Ava, Inc., issued 7% bonds, dated January 1, with a face amount of $117,200 on January 1, 2016 for an issue price of 106.5. The
natta225 [31]

Complete Question

The complete question is shown on the first uploaded image

Answer:

10a The interest payment on the bond is = $ 8,204

10b The debit to cash for the bond proceeds is = $ 302,000

Explanation:

The explanation is shown on the second uploaded image

8 0
3 years ago
Is potassium fluoride a covalent bond or ionic bond
Ivahew [28]

It's an ionic bond! Potassium is a cation, or a metal with a positive charge, and fluoride is an anion, or a nonmetal with a negative charge.

A covalent bond is the bond between two nonmetals.

Hope this helped!

7 0
3 years ago
Read 2 more answers
Explain why a nuclear chain reaction is self-sustaining.
skelet666 [1.2K]

answer is written in word file attached below

Download docx
6 0
2 years ago
In a science lab, a student heats up a chemical from 10 °C to 25 °C which requires thermal energy of 30000 J. If mass of the obj
olganol [36]

Answer:

The specific heat capacity of the object is 50 J/g°C ( option 4 is correct)

Explanation:

Step 1: Data given

Initial temperature = 10.0 °C

Final temperature = 25.0 °C

Energy required = 30000 J

Mass of the object = 40.0 grams

Step 2: Calculate the specific heat capacity of the object

Q = m* c * ΔT

⇒With Q = the heat required = 30000 J

⇒with m = the mass of the object = 40.0 grams

⇒with c = the specific heat capacity of the object = TO BE DETERMINED

⇒with ΔT = The change in temperature = T2 - T2 = 25.0 °C - 10.0°C = 15.0 °C

30000 J = 40.0 g * c * 15.0 °C

c = 30000 J / (40.0 g * 15.0 °C)

c = 50 J/g°C

The specific heat capacity of the object is 50 J/g°C ( option 4 is correct)

3 0
3 years ago
Other questions:
  • CAN SOMEONE PLEASE WRITE ME SHORT STORY FOR THIS. I'LL GIVE YOU BRAINLIEST. I PROMISE. 98 POINTS
    6·1 answer
  • a certain metal hydroxide, m(oh)2, contains 32.8% oxygen by mass. what is the identity of the metal m?
    9·1 answer
  • Why are the alkali metals and the halogens very reactive
    15·1 answer
  • The language of science is _____?
    11·2 answers
  • A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule woul
    5·1 answer
  • A sample of gas has a mass of 827 mg . Its volume is 0.270 L at a temperature of 88 ∘ C and a pressure of 975 mmHg . Find its mo
    11·1 answer
  • Please help me with number 4
    8·1 answer
  • What statements accurately describe matter? Check all that apply
    6·1 answer
  • What is the name of this compound?<br><br> C6H6-<br> C=O-<br> H
    11·2 answers
  • Increasing which factor will cause the gravitational force between two objects to decrease?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!