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
Brrunno [24]
2 years ago
14

I need answers to question 1,2,3

Chemistry
1 answer:
sashaice [31]2 years ago
6 0

Answer:

1. 0.125 mole

2. 42.5 g

3. 0.61 mole

Explanation:

1. Determination of the number of mole of NaOH.

Mass of NaOH = 5 g

Molar mass of NaOH = 23 + 16 + 1

= 40 g/mol

Mole of NaOH =?

Mole = mass /molar mass

Mole of NaOH = 5/40

Mole NaOH = 0.125 mole

2. Determination of the mass of NH₃.

Mole of NH₃ = 2.5 moles

Molar mass of NH₃ = 14 + (3×1)

= 14 + 3

= 17 g/mol

Mass of NH₃ =?

Mass = mole × molar mass

Mass of NH₃ = 2.5 × 17

Mass of NH₃ = 42.5 g

3. Determination of the number of mole of Ca(NO₃)₂.

Mass of Ca(NO₃)₂ = 100 g

Molar mass of Ca(NO₃)₂ = 40 + 2[14 + (3×16)]

= 40 + 2[14 + 48]

= 40 + 2[62]

= 40 + 124

= 164 g/mol

Mole of Ca(NO₃)₂ =?

Mole = mass /molar mass

Mole of Ca(NO₃)₂ = 100 / 164

Mole of Ca(NO₃)₂ = 0.61 mole

You might be interested in
3. Which one is part of the kinetic molecular theory? Yes = part of KMT, No = not part
lidiya [134]

Explanation:

a. Average kinetic energy is directly proportional to absolute Kelvin temperature of a gas.

Yes

b. There are no attractive forces and repulsive forces between gas molecules.

Yes

C. Atoms are neither created nor destroyed by ordinary chemical reactions.

No

d. The volume occupied by all of the gas molecules in a container is negligible compared to  the volume of the container

Yes

The kinetic molecular theory is one of such theories used to explain the forces between molecules and the energy they posses.

According to the theory;

  • The temperature of gas is proportional to the average kinetic energy.
  • Molecules are independent of one another and the force of attraction and repulsion between them is negligible.
  • volume occupied by gases is negligible compared to the volume of the container.

Law of conservation of matter states that "atoms are neither created nor destroyed by ordinary chemical reactions".

learn more:

Kinetic molecular theory brainly.com/question/12362857

#learnwithBrainly

6 0
3 years ago
The atomic number of carbon is 6. its nucleus must contain:
Aloiza [94]
Must contain: 6 protons, 6 electrons and 12 neutrons.
5 0
3 years ago
Assume that the reaction of aqueous hydrobromic acid solution and potassium hydroxide base undergoes a complete neutralization r
Tamiku [17]

Answer:

a.

HBr + KOH → KBr + H  _{2} O

b.

1000 \: ml \: contains \: 0.685 \: moles \\ 55.4 \: ml \: contains \: ( \frac{55.4 \times 0.685}{1000} ) \\  = 0.038 \:moles \\ 1 \: mole \: of \: hydrobromic \: acid  \: produces \: 1 \: mole \: of \: water \\ 0.038 \: moles \: produce \: (0.038 \times 1) \\  = 0.038 \: moles \\ 1 \: mole \: of \: water \: weighs \: 18 \: g \\ 0.038 \: moles \: weighs \: (0.038 \times 18) \: g \\  = 0.684 \: g

c.

0.042 M

d.

1.4

5 0
2 years ago
The graph shows the changes in the phase of ice when it is heated.
mina [271]

Answer:

100 degree celcius, because it is the melting point of ice ob

6 0
2 years ago
Which transition in the hydrogen atom produces emitted light with the longest wavelength?
monitta

Answer:

Red light has the longest wavelength

Explanation:

Red light is emitted when a high energy state  electron drops from  high energy level  3 to low energy level 2. Red light has the longest wavelength and lowest energy. It is a know fact that the shorter the drop within energy levels, the  lesser the energy.

6 0
3 years ago
Other questions:
  • Carbon, hydrogen, silicon, nitrogen, sulfur, and phosphorus are the six most important elements found in living things.
    11·1 answer
  • A compound of low solubility
    10·1 answer
  • What is the molas mass of lithium oxide li2o
    14·2 answers
  • Steps of scientific inquiry?
    11·2 answers
  • PLEASE ASAP. CHM help!
    11·1 answer
  • Which atom is most likely to accept electrons to form an ionic bond?
    15·1 answer
  • Which part of the water cycle will help an area that is flooded?
    9·2 answers
  • 6. The concentration of a solution is : a)The amount of solvent needed to fully dissolve a solute b)The measurement of how large
    15·1 answer
  • How r fossil fuel helpful <br> Plss help ill give brainliest
    10·2 answers
  • Will mark BRAINLIEST question and choices in photos
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!