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Ugo [173]
3 years ago
7

A police car drives with a constant speed of 58 miles per how long will it take to travel a distance of 29 miles

Chemistry
1 answer:
astra-53 [7]3 years ago
5 0

Answer:

It takes 2 hours for a police car to travel a distance of 29 miles with 58 miles per hour.

Explanation:

The speed of the car is 58 miles per hour.

The total distance traveled is 29 miles.

We need to find the time taken to cover the distance of 29 miles by the police car if police traveled at 58 miles per hour.

We know that,

Relationship between speed, time and distance is speed=\frac{distance}{time}

Now substitute the given values in the above formula,

58=\frac{29}{time}

time=\frac{29}{58}

Time = 2 hours.

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How much CaCO3 would have to be decomposed to produce 247 g of CaO
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441 g CaCO₃ would have to be decomposed to produce 247 g of CaO

<h3>Further explanation</h3>

Reaction

Decomposition of CaCO₃

CaCO₃ ⇒ CaO + CO₂

mass CaO = 247 g

mol of CaO(MW=56 g/mol) :

\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{247}{56}\\\\mol=4.41

From equation, mol ratio CaCO₃ : CaO = 1 : 1, so mol CaO :

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mass CaCO₃(MW=100 g/mol) :

\tt mass=mol\times MW\\\\mass=4.41\times 100\\\\mass=441~g

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