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
Neko [114]
3 years ago
13

Please enter the values you calculated for each of your three trials for the molarity of your NaOH solution. Place your molarity

entries in the order corresponding with the masses of KHP and the volumes of NaOH required for the trials. You should enter 4 significant figures, e.g. 0.1487 M .
Entry # grams KHP mL NaOH M NaOH
#1: 0.5240 15.7 ?
#2: 0.5320 17.8 ?
#3: 0.5120 16.7
Chemistry
1 answer:
Alexandra [31]3 years ago
6 0

Answer:

#1. M NaOH = 0.1634 M

#2. M NaOH = 0.1464 M

#3. M NaOH = 0.1501 M

Explanation:

  • molarity [=] mol/L

balanced reaction:

  • NaOH + KHP → KNaP + H2O

∴ molar mass KHP = 204.22 g/mol

#1:

∴ mass KHP = 0.5240 g

∴ volume NaOH = 15.7 mL = 0.0157 L

⇒ moles NaOH = (0.5240 g KHP)(mol/204.22 g KHP)(mol NaOH/mol KHP)

⇒ moles NaOH = 2.566 E-3 mol

⇒ M NaOH = (2.566 E-3 mol)/(0.0157 L) = 0.1634 M

#2:

∴ mass KHP = 0.5320 g

∴ volume NaOH = 17.8 mL = 0.0178 L

⇒ moles NaOH = 2.605 E-3 mol

⇒ M NaOH = 0.1464 M

#3:

∴ mass KHP = 0.5120 g

∴ volume NaOH = 16.7 mL = 0.0167 L

⇒ moles NaOH = 2.5071 E-3 mol

⇒ M NaOH = 0.1501 M

You might be interested in
What is the temperature of 0.55 mol of gas at a pressure of 1.5 atm and a volume of 12.6 L ?
Taya2010 [7]

Answer:

The temperature is 419,1 K

Explanation:

We use the formula PV=nRT  T=PV/nR

T=1,5 atm x 12,6 L/0,55 mol x 0,082 l atm/K mol

T= 419,0687361 K

3 0
3 years ago
If you use a horizontal force of 32.0 N to slide a 12.5 kg wooden crate across a floor at a constant velocity, what is the coeff
sergejj [24]

Answer:

Value of coefficient of kinetic friction is 0.26 .

Explanation:

Given:

Mass of wooden crate, m = 12.5 kg.

Horizontal force to keep the block moving with constant velocity, F = 32.0 N.

Since, the block is moving with constant velocity.

So, net force experience by it is zero.

Therefore, fore of friction is equal to applied force.

Now, force of friction , F=\mu_kN  (  here \mu_k is coefficient of kinetic friction and N is normal force)

Therefore, \mu_kN=\mu_k\times mg=\mu_k\times 12.5 \times 9.8=122.5\times \mu_k

Now, both forces are equal.

122.5\times \mu_k=32\\\mu_k=\dfrac{32}{122.5}=0.26      

The value of coefficient of kinetic friction is 0.26 .

Hence, it is the required solution.

6 0
3 years ago
What is the lightest material ever created by the hands of men
lutik1710 [3]
The world's lightest material is carbon aerogel which has a mass of only 0.16 milligram and it is even lighter than aerographite.
6 0
3 years ago
What is the energy of light with a wavelength of 468 nm? (The speed of light
marshall27 [118]

The answer for the problem is explained below.

The option for the answer is "D".

<u><em>Therefore the energy of the light is  4.25 × 10^-19 J</em></u>

Explanation:

Given:

wavelength (λ) = 468 nm = 468×10^-9 m

speed of light (c) = 3.00 x 10^8m/s

Planck's constant is 6.626 x 10^-34J·s

To solve:

energy of light (E)

We know,

E =(h×c) ÷ λ

E = ( 6.626 x 10^-34 ×  3.00 x 10^8) ÷ 468×10^-9

E = 4.25 × 10^-19 J

<u><em>Therefore the energy of the light is  4.25 × 10^-19 J</em></u>

6 0
3 years ago
What s thisssss oneeeeeee
ZanzabumX [31]
C
Explanation- equals 459
3 0
3 years ago
Other questions:
  • An object has a mass of 4.9g and a volume of 14.ml.what is the density of the object?
    8·1 answer
  • Im bored someone add my discord and talk to me <br>--&gt; bestface#3185 &lt;--
    9·1 answer
  • A gas is contained in a thick-walled balloon. When the pressure changes from 319 mm Hg to 215 mm Hg, th volume changes from 0.55
    9·2 answers
  • Which of the following pieces of glassware can be used to measure the volume of a liquid with the greatest accuracy?
    10·1 answer
  • Identify two acids and two bases that you use or
    13·2 answers
  • What determines your blood cholesterol level?
    10·2 answers
  • Water can be made to boil at 105 degrees Celsius instead of 100 degrees Celsius by
    8·1 answer
  • Which of the following represents a compound made of five molecules? CO 5 C 2O 5 C 5O 5CO 2
    8·1 answer
  • 1. Tyrone is riding his newly bought motorcycle at 30 m/s when he sees a cat on the road ahead. He applied immediately the brake
    15·1 answer
  • ______________________________________________
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!