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2 years ago

Can a helium tank ever be half empty

Chemistry

2 answers:

Ludmilka [50]2 years ago

8 0

Yes it can be I believe

maw [93]2 years ago

5 0

Technically yes, it can have half the mass it originally had

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What will happen to the salt when mixed to liquid?

Pepsi [2]

Answer:

the salt dissolves in water because of covalent bonds.

Explanation:

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2 years ago

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Using the measurements in the table, determine which unidentified metal has the lowest density

Oliga [24]

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The radius of a lithium atom is 130 picometers, and the radius of a fluorine atom is 60 picometers. The radius of a lithium ion,

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Answer:

A positive ions is always smaller than the corresponding atom.

A negative ion is always larger than the corresponding atom.

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3 years ago

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tatuchka [14]

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O, I, Ca

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3 years ago

What is the significance of "Er" in the diagram?

Drupady [299]

Answer:

The significance of "Er" in the diagram is :

B.) Threshold energy for reaction

Explanation:

Threshold energy : It is total amount of energy required by the reactant molecule to reach the transition state .

Activation energy : It is the excess energy absorbed by the molecules to reach the transition state.

Activation Energy = Threshold Energy - Average Kinetic Energy

This means Activation energy decreases on increasing kinetic energy

On increasing Temperature average kinetic energy of the molecule increases which reduces the activation energy and the reaction occur faster in that case.

Catalyst also reduces the Activation energy.

Er = Threshshold energy for reaction at 30 degree

Ea = Activation Energy

The given figure shows that the threshold energy decreases on increasing the temperature

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3 years ago

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