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
Maksim231197 [3]
3 years ago
11

A buffer is formed by mixing 100 ml of 0.1 m nh4cl with 50 ml of 0.3 m nh3. to this solution 13 ml of 0.1 m naoh is added. what

is the approximate ph of the new solution after neutralization? assume a kb of 1.8 × 10−5 for the weak base. 1. 4.62 2. 4.47 3. 9.38 4. 9.45 5. 9.53
Chemistry
1 answer:
Hoochie [10]3 years ago
8 0
I had the same question last week and my answer was C. Try that.
You might be interested in
How many moles (of molecules or formula units) are in each sample?
Alexus [3.1K]

The number of moles in each sample will be 0.391 moles, 30.7 moles, 0.456 moles, and 1350 moles

<h3>What is the number of moles?</h3>

The number of moles of a substance is the ratio of the mass of the substance to the molar mass.

In other words; mole = mass/molar mass.

Thus:

  • moles of 18.0 g NO_2 = 18.0/46

                                   = 0.391 moles

  • moles of 1.35 kg CO_2 = 1350/44

                                         = 30.7 moles

  • moles of 46.1 g KNO_3 = 46.1/101.1

                                          = 0.456 moles

  • moles of 191.8 kg Na_2SO_4 = 191800/142

                                                 = 1350 moles

More on the number of moles of substances can be found here: brainly.com/question/1445383

#SPJ1

5 0
2 years ago
W
DerKrebs [107]

Answer:

F = 30 N

Explanation:

Given data:

Mass of toy train = 1.5 kg

Acceleration of train = 20 m/s²

Amount of force acting on it = ?

Solution:

The net force on object is equal to the its mass multiply by its acceleration.

Formula:

F = ma

F = force

m = mass

a = acceleration

Now we will put the values in formula.

F = 1.5 kg × 20ms⁻²

F = 30 kg.ms⁻²

kg.ms⁻² = N

F = 30 N

7 0
3 years ago
Summary of a trade-off between. Potential and kinetic energy
uranmaximum [27]
Simply put, Potential energy is the "build up". If I had a ball on the top a 5ft slide, it would have potential energy, as long as it hasn't slid down yet.

If I had another ball on a 10ft slide, it would have twice the potential energy the first ball had.

What comes next is kinetic energy, which is the energy used when the object is moving, like the ball as it goes down the slide. The faster it moves, the more kinetic energy. 

Basically, <em>Potential</em> is the "build up" but it does not, I repeat does not move.

<em>Kinetic</em> energy is the use of the "build up" through movement.
<span>
</span>
7 0
3 years ago
A heated metal object measures 120⁰C. It is dropped into a small bucket filled with water that is 10⁰C. Which of the following i
VARVARA [1.3K]

Answer:

d

Explanation:

(d the water and metal will adjust to the same temperature between 10 degree c and 120 degree c this temperature will be call equilibrium temperature

7 0
2 years ago
Number 10 plz :D tysm!!!
dolphi86 [110]
The answer is B because<span> as </span>plates<span> made of oceanic crust pull apart, a crack in the ocean floor appears. Magma then oozes up from the mantle to fill in the space between the </span>plates<span>, forming a raised ridge called a mid-ocean ridge.

</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE HELPPP!!!!!!!!!!!!!!!!!!!!
    13·2 answers
  • Calculate the molality for each of the following solutions. Then, calculate the freezing-point depression ΔTF = iKFcm produced b
    11·1 answer
  • How many electrons are in the highest energy orbital of the element copper?
    13·1 answer
  • What happens to the number of valence electrons as you move from left to right in the periodic table?
    13·1 answer
  • Which formula is a molecular compound?<br><br> H2O2<br> CaO<br> MgS<br> NaCl
    10·2 answers
  • Which of these compounds would you expect to be most soluble in water? ch3ch2ch2f ch3ch2ch2oh ch3ch2ch2ch3 ch3ch2cl description?
    5·1 answer
  • One mole of an ideal gas is sealed in a 22.4-L container at a pressure of 1 atm and a temperature of 273 K. The temperature is t
    7·1 answer
  • Who is the Administrator of Brainly??​<br><br>Hopefully, someone will answer (◍•ᴗ•◍)❤
    13·2 answers
  • Select the correct answer.
    12·2 answers
  • Chlorine, Cl2,is a gas at room temperature, but bromine, Br2, is a liquid. Why?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!