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3 years ago

If the fuel efficiency of an automobile is 21.0 miles per gallon, what is its fuel efficiency in

Chemistry

1 answer:

Zielflug [23.3K]3 years ago

4 0

The answer is B.8.93

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The Al-Aqsa Mosque and Dome of the Rock are located in

kvasek [131]

The correct answer is - Jerusalem

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3 years ago

What mass of iron(II) oxide must be used in the reaction given by the equation below to release 44.7 kJ? 6FeO(s) + O2(g) => 2

zavuch27 [327]

Answer: The mass of iron (II) oxide that must be used in the reaction is 30.37

Explanation:

The given chemical reaction follows:

$6FeO(s)+O_2(g)\rightarrow 2Fe_3O_4(s);\Delta H^o=-635kJ$

By Stoichiometry of the reaction:

When 635 kJ of energy is released, 6 moles of iron (II) oxide is reacted.

So, when 44.7 kJ of energy is released, $\frac{6}{635}\times 44.7=0.423mol$ of iron (II) oxide is reacted.

Now, calculating the mass of iron (II) oxide by using the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of iron (II) oxide = 0.423 moles

Molar mass of iron (II) oxide = 71.8 g/mol

Putting values in above equation, we get:

$0.423mol=\frac{\text{Mass of FeO}}{71.8g/mol}\\\\\text{Mass of FeO}=(0.423mol\times 71.8g/mol)=30.37g$

Hence, the mass of iron (II) oxide that must be used in the reaction is 30.37

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4 years ago

Why do automobiles rust more easily in wet climates than drier climates

elixir [45]

It rusts more in wet climates because it is water and when water hits the automobile there is a chemical reaction. If the water is salt water it will cause it to rust quicker.

6 0

3 years ago

PLEASE HELP Which reagent is the limiting reagent in a reaction?

Igoryamba

Answer:

I believe B

Explanation:

Hope this helps

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3 years ago

#1: When you squeeze an air-filled balloon, what happens inside?

julia-pushkina [17]

When you squeeze an air-filled balloon, you are decreasing its volume. Imagine a ball going at a constant speed between two walls that are 10 feet apart vs. 1 feet apart. You can imagine that when the walls are only 1 feet apart, the ball will hit the walls more times. Therefore, the answer is A. You are correct.

3 0

3 years ago