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2 years ago

How many cobalt atoms are in 2 moles of cobalt?

1 answer:

4 0

That means that one mole of cobalt weighs 58.9332 grams (58.9332 g/mol). Based on that information, to convert 2 moles of cobalt to grams, we multiply 2 moles of cobalt by 58.9332.

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Place these hydrocarbons in order of decreasing boiling point. Compound Structure butane CH3CH2CH2CH3 pentane CH3CH2CH2CH2CH3 2,

Svetllana [295]

Answer:

Order of hydrocarbons in decreasing order of boiling point:

Paraffin > Hexadecane > Pentane > Dimethylpropane > Butane

Explanation:

Boiling points of hydrocarbons depend upon:

Mass of the hydrocarbon

Intermolecular forces of interaction

Hydrocarbons of greater mass or greater number of carbons have greater molecular mass.

Molecular formula of paraffin is $CH_3(CH2)_{33}CH3$

Molecular formula of hexadecane is $CH_3(CH2)_{14}CH3$

Among given hydrocarbons, number of carbon is highest in paraffin and hence has highest boiling point.

Boiling point of paraffin is followed by hexadecane having second highest number of carbon.

Mass of dimethylpropane and pentane are comparable. But boiling point of dimethylpropane is less than pentane. This is because branching decreases intermolecular force of attraction (van der Waal's force) which leads to decrease in boiling point.

No. of carbon in butane is least among given. So its boiling point is lowest.

Hence, Order of hydrocarbons in decreasing order of boiling point:

Paraffin > Hexadecane > Pentane > Dimethylpropane > Butane

7 0

2 years ago

Atmospheric pressure arises due to the force exerted by the air above the Earth. At higher altitudes, the mass of the air above

SVETLANKA909090 [29]

Answer:

less, decreases

Explanation:

When the pressure of an atmosphere occurs because of the force exerted so at the time of the higher altitudes, the air mass i.e. above the earth should be less as the air is attracted towards surface of an earth because of the gravity and air contains the mass that shows near the surface area so automatically the air density reduced due to which the mass also decreased

7 0

3 years ago

SrOH2 —> Sr2O + H2O. Balance

RSB [31]

Answer:yep

Explanation:

Yyes

5 0

3 years ago

EXPLAIN why a skateboard coasting on a flat surface slows down and comes to a stop

ankoles [38]

A skateboard coasting on a flat surface slows down and then comes to a stop because the skateboard runs out of energy, and slows down, also, sense it is on a flat surface and not going downhill, it goes slower.

6 0

2 years ago

Let the simulator run for 30 seconds. What happens to the size of the ice?

Shkiper50 [21]

10 is your answer hope it helps you.......... Xd

<h2>Answer : 10 </h2>

7 0

2 years ago