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
Vedmedyk [2.9K]
3 years ago
7

Interesting facts about coal

Chemistry
2 answers:
babunello [35]3 years ago
8 0
Coal will eventually run out as it is an non-renewable energy. these are when they cannot be reproduced to make more,unlike would as u can replant them to create trees
Delicious77 [7]3 years ago
7 0
Coal is made of carbon<span> and also has more elements like </span>hydrogen<span>, </span>oxygen<span>, sulfur and </span>nitrogen<span>.
</span>Coal starts as plant matter at the bottom of ocean/water<span>. Eventually it is covered and buried by sediments where over a while, metamorphosis (a change in form) happens.
</span><span>Coal is also one of the biggest, if not the largest, source of energy for the making of electricity.</span>
You might be interested in
What compound has the ability to absorb large amounts of heat without itself increasing dramatically in temperature
Scorpion4ik [409]
It can be anything with a big heat capacity like water
5 0
3 years ago
Iupac name of h3C-C-Ch2-ch3​
pshichka [43]

Answer:

The IUPAC name of given compound is 3−5−ethyl−5−−3−methylheptane. Explanation: The parental chain is of 7 carbons with single bonds hence it is heptane. Two substituents ethyl and methyl group are attached from an equal distance. Hence according to the alphabetical order preference, counting starts from carbon which is close to an ethyl group.

8 0
3 years ago
Stearic acid (C18H36O2) is a fatty acid, a molecule with a long hydrocarbon chain and an organic acid group (COOH) at the end. I
Paha777 [63]

Answer:

There is 9671  Kj of heat released

Explanation:

<u>Step 1:</u> The balanced equation:

C18H36O2(s) + 26O2(g) --> 18CO2(g)+18H2O(g)

This means for 1 mole of C18H36O2 consumed there is 26 moles of O2 needed to produce 18 moles of CO2 and 18 moles of H2O.

<u>Step 2:</u> Calculate the heat of combustion

ΔH (combustion) = [18*(ΔHf of CO2) + 18*(ΔHf of H2O)] - [1*(ΔHf of C18H36O2) + 26*(ΔHf of O2)]

ΔH (combustion) = [18*(-394 kJ/mol) + 18*(-242 kJ/mol)] - [1*(-948 kJ/mol) + 26*(0 kJ/mol)]

ΔH (combustion) = [(-7092 kJ/mol) + (-4356 kJ/mol)] - (-948 kJ/mol)

= -10500 kJ/mol

ΔH (combustion) = heat released / number of moles of stearic acid

<u>Step 3:</u> Calculate moles of stearic acid

moles of stearic acid = mass / Molar mass of stearic acid

moles of stearic acid = 262g / 284.48 g/mole = 0.921 moles

<u>Step 4:</u> Calculate moles of oxygen

moles of O2 = 914.5 / 32g/mole

moles of O2 = 28.578125 moles

Stearic acid is the limiting reactant: it will <u>completely react</u>

There will react 26*0.921 mole = 23.946 mole of O2

This means there will remain 4.63 moles of O2

<u>Step 5:</u> Calculate heat released

q = (ΔH combustion) * (moles of stearic acid) = (-10500 kJ/mol) * (0.921 moles) = 9671 Kj

There is 9671  Kj of heat released

6 0
3 years ago
The chemical equation is Mg(s) + O2(g) → MgO(s)
vredina [299]

Answer:

The magnesium will burn until consumed entirely. There is much more oxygen available in the atmosphere than needed to consume the magnesium. Thus the magnesium is the limiting reactant because it determines the amount of product formed.

Explanation:

Mg produces less amount of MgO than O2; therefore Mg is the limiting reagent. O2 produces more amount of MgO than Mg; therefore O2 is the excess reagent.

4 0
3 years ago
Help anyone? :) please
Elanso [62]

Answer:

6. protons, mass number from the atomic number

7. Li= ,

8 0
2 years ago
Other questions:
  • The slant of the earth is called what
    11·2 answers
  • : 0.882 mm what’s the answer
    13·2 answers
  • Imagine that one carbon in buckminsterfullerene (C60) is replaced by a silicon atom, yielding SiC59. This molecule can then orie
    11·1 answer
  • What do the Roman numerals in a cation's name indicate?
    14·2 answers
  • A student accidentally reversed the order of solvents A, B, and C in the column chromatography and used the acetone FIRST and th
    11·1 answer
  • What happens to the air temperature of a decending mass of air
    10·1 answer
  • On the basis of periodic trends, choose the larger atom from each pair (if possible): match the elements in the left column to t
    13·1 answer
  • CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + CO2 (g) + H20 (1)
    6·1 answer
  • I. Escribe el tipo de reacción al que pertenece cada una de las siguientes reacciones: a. P4(s) + 3 O2 (g) → 2 P2O3 (g) b. CaCO3
    9·2 answers
  • ASAPPP The light given off by an electric discharge through mercury vapor is ____.
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!