03/27/2012
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How to determine the mass fraction of the element

How to determine the mass fraction of the element

To determine the mass fraction of the element,determine the chemical formula of the substance, the mass fractions of the elements of which is calculated. Using the periodic table, determine the atomic weights of all the elements and the molecular weight of the substance.

Then find the ratio of the atomic mass of the element to the molecular weight.

(Further…)
03/21/2012
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How to translate Volts in Volts

How to translate Volts in Volts

What stress acts between two points of the circuit? The answer to this question is not as obvious as it seems.

There are two voltage: amplitude and acting.

Method conversion from one to another depends on the waveform.

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