The degree to which a measurement approaches a standard value is _____. accuracy

Chemistry

2 answers:

levacccp [35]3 years ago

7 0

You forgot one...and that happens to be the answer---> Accuracy

Mamont248 [21]3 years ago

4 0

Answer:

accuracy

Explanation:

The close a measured value is to a standard accepted value the more accurate the measurement is. For example, 1 liter of milk is given and its volume is measured twice. The two measured volumes are 99 ml and 98 ml respectively. Here the former measured value is more accurate than the later measurement.

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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

Only the molecule having energy greater than Er can react to form product