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leonid [27]
3 years ago
13

How many molecules are in 4.0 mol h20

Chemistry
1 answer:
Leona [35]3 years ago
7 0
4 moles of water will have 4 number of water molecules
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The production of NOx gases is an unwanted side reaction of the main engine combustion process that turns octane, C8H18, into CO
borishaifa [10]

Answer:

710,33 g NO2

Explanation:

2 C8H18 + 25 O2 → 16 CO2 + 18 H2O  

(800 g octane) / (114.2293 g C8H18/mol x (25/2)) = 87.54 mol O2 used to combust the octane

87.54 mol O2 x \frac{15}{85} = 15.44 mol O2 used to form NO2

O2 + 2NO → 2NO2

(15.44 mol O2) x (2/2) x (46.0056 g NO2/mol) = 710,33 g NO2

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3 years ago
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What combines to form compounds? A. atoms of elements B. molecules C. minerals D. valences
hammer [34]
D would be correct (i did this Assessment today)<span />
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What source of thermal energy does an internal combustion engine use?
Dafna1 [17]

Answer:

D

Explanation:

The source of the thermal energy in a combustion engine is the spark from the spark plug that ignites the fuel and air mixture converting chemical energy into thermal energy.

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3 years ago
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The sum of pH and pOH for any aqueous solution equals .
Vsevolod [243]

Answer:

pH is calculated by taking negative logarithm of hydrogen ion concentration. Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7. Thus the sum of pH and pOH is 14

Explanation:

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Which is not a characteristic of a mineral?
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i also had this question:P

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