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vesna_86 [32]
3 years ago
9

Water is believed to be one of the best fire extinguishers then why it is so that fire in oil spills over ocean/sea is difficult

to douse? Choose the most appropriate explanation.
a. Water has no effect on the Ignition temperature of oil
b. Oil is less dense than water and thus continues to undergo combustion
c. Density of oil and water has no bearing on the nature of fire and hence on the
extinguisher
d. All above statements are correct explanation for the given statement
Chemistry
1 answer:
Eddi Din [679]3 years ago
6 0

Answer:

D

Explanation:

Trust me

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Enthalpy of combustion of ethyl alcohol, C2 H5 OH, is – 950 kJ mol–1. How much heat is evolved when one gram of ethyl alcohol bu
melomori [17]
<h3>Answer:</h3>

20.62 Kilo-joules

<h3>Explanation:</h3>
  • The Enthalpy of combustion of ethyl alcohol is -950 kJ/mol.
  • This means that 1 mole of ethyl alcohol evolves a quantity of heat of 950 Joules when burned.

Molar mass of ethyl ethanol = 46.08 g/mol

Therefore;

46.08 g of  C₂H₅OH evolves heat equivalent to 950 kilojoules

We can calculate the amount of heat evolved by 1 g of C₂H₅OH

Heat evolved by 1 g of C₂H₅OH  = Molar enthalpy of combustion ÷ Molar mass

                                      = 950 kJ/mol ÷ 46.08 g/mol

                                      = 20.62 Kj/g

Therefore, a gram of C₂H₅OH  will evolve 20.62 kilo-joules of heat

7 0
3 years ago
Predict the products for the following chemical reaction: H2 + O2 →
RSB [31]
The answer is C I got it right so hope it helped ;)
6 0
3 years ago
Oxygen is produced by what part of photosynthesis? HURRY
nikklg [1K]

Answer:The oxygen during photosynthesis comes from split water molecules. During photosynthesis, the plant absorbs water and carbon dioxide. After the absorption, the water molecules are disassembled and converted into sugar and oxygen.

5 0
3 years ago
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In the covalent compound C3H8 the Greek prefix used to represent the cation is?
krok68 [10]

Answer:

pro

Explanation:

c3h8 is propane

3 carbons makes it PROpane

the ANE come from all single bonds

4 0
3 years ago
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The theoretical yield of Cl2 from certain starting amounts of MnO2 and HCl was calculated as 60.25 g and 65.02 g, respectively.
hoa [83]

The actual yield is 43 g Cl₂.

The <em>limiting reactant was MnO₂</em> because it gave the smaller mass of Cl₂.

∴ The <em>theoretical yield</em> is 60.25 g Cl₂.

% yield = actual yield/theoretical yield × 100 %

Actual yield = theoretical yield × (% yield/100 %) = 60.25 g × (72 %/100%) = 43 g

8 0
3 years ago
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