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
Nady [450]
3 years ago
9

Please help! I don’t know how to calculate reacting masses

Chemistry
1 answer:
lord [1]3 years ago
5 0

Answer:

Mass of phosphoric acid = 6.37 g

Mass of magnesium nitride = 50.5 g

Mass of  iron chloride = 22.71 g

Explanation:

1 = Given data:

Mass of phosphorus = 4 g

Mass of phosphoric oxide = ?

Solution:

4P +  5O₂  →  2P₂O₅

Number of moles of phosphorus = mass / molar mass

Number of moles of phosphorus = 4 g / 31 g/mol

Number of moles of phosphorus = 0.13 mol

Mole ration of phosphorus and phosphoric acid.

                                 P        :         P₂O₅

                                 4        :           2

                               0.13      :          2/4× 0.13 = 0.065 mol

Mass of phosphoric acid:

Mass of phosphoric acid = moles × molar mass

Mass of phosphoric acid = 0.065 mol × 98 g/mol

Mass of phosphoric acid = 6.37 g

2 = Given data:

Mass of magnesium = 36 g

Mass of magnesium nitride = ?

Solution:

3Mg  + N₂   →   Mg₃N₂

Number of moles of magnesium = mass / molar mass

Number of moles of magnesium = 36 g / 24 g/mol

Number of moles of magnesium = 1.5 mol

Mole ration of magnesium and magnesium nitride.

                                 Mg     :        Mg₃N₂

                                 3        :           1

                               1.5        :          1/3× 1.5 = 0.5 mol

Mass of magnesium nitride:

Mass of magnesium nitride = moles × molar mass

Mass of magnesium nitride = 0.5 mol × 101 g/mol

Mass of magnesium nitride = 50.5 g

3 = Given data:

Mass of iron = 8 g

Mass of iron chloride = ?

Solution:

2Fe  + 3Cl₂   →   2FeCl₃

Number of moles of iron = mass / molar mass

Number of moles of iron = 8 g / 55.85 g/mol

Number of moles of iron = 0.14 mol

Mole ration of iron and iron chloride.

                                Fe     :        FeCl₃

                                 2        :           2

                               0.14       :          0.14

Mass of iron chloride:

Mass of  iron chloride = moles × molar mass

Mass of iron chloride = 0.14 mol × 162.2 g/mol

Mass of  iron chloride = 22.71 g

           

You might be interested in
Problem Page Question It takes to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbo
Marizza181 [45]

This is a incomplete question. The complete question is:

It takes 348 kJ/mol to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon. Round your answer to correct number of significant digits

Answer: 344 nm

Explanation:

E=\frac{Nhc}{\lambda}

E= energy  = 348kJ= 348000 J  (1kJ=1000J)

N = avogadro's number = 6.023\times 10^{23}

h = Planck's constant = 6.626\times 10^{-34}Js


c = speed of light = 3\times 10^8ms^{-1}

348000=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{\lambda}

\lambda=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{348000}

\lambda=3.44\times 10^{-7}m=344nm    1nm=10^{-9}m

Thus the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon is 344 nm

5 0
3 years ago
Methanol (CH3OH) has a heat of fusion of 3.16 kJ/mol. Which of the following is the heat of solidification that occurs when 64 g
Alexandra [31]
To determine the heat dissipated when a substance freezes, we multiply the heat of fusion of the substance to the mass of the substance that freezes. We calculate as follows:

Heat = -3.16 (64/32.06) = - 6.32 kJ

Hope this answers the question.
5 0
3 years ago
Read 2 more answers
Why does water taste different (bottled)
xxMikexx [17]

Answer:

because the water in a bottle has been purified  

Explanation:

7 0
2 years ago
Read 2 more answers
Which metals or non-metals are liquid at a room temperature of 25°C?​
irakobra [83]

Answer:

gallium

Explanation:

it is the old melting in a hot cup of coffee spoon

7 0
2 years ago
Read 2 more answers
What is the complete word equation for incomplete combustion for methane
Arada [10]
Incomplete combustion is formed like: hydrocarbon + oxygen-> carbon + carbon monoxide + water!
8 0
2 years ago
Other questions:
  • In the following reaction, 2NaCl 2Na + Cl2 sodium and chlorine are products, salts, reactants, or ions?
    12·2 answers
  • What color would a phenolphthalein solution be at ph=11 ?
    9·2 answers
  • How is the movement of particles in diffusion determined?
    13·1 answer
  • Three students are working with different substances to measure the chemical changes that occur. Chao is working with milk, Mia
    5·2 answers
  • What are the properties of elements related to
    10·1 answer
  • Complete the chart
    15·1 answer
  • AL
    11·1 answer
  • Only 14 one pleaseeee
    6·1 answer
  • How is a strand of DNA like a sentence?
    9·2 answers
  • 3.<br> What is the presence of hornblende in the rock an important clue?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!