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natima [27]
3 years ago
8

Why do you use 6.02*10^23 here?? #21???

Chemistry
2 answers:
almond37 [142]3 years ago
6 0
6.02*10^23 is Avagadro's number representing the number of molecules per mole of substance.
Sindrei [870]3 years ago
3 0
In order to convert from moles to molecules, you have to use Avogadro’s number, 6.022*10^23mol^-1.
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(a) The molecular equations shows the equation in which all the species of the reactants and the products are in molecules and the net charge is zero.

The complete ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and are represented as ions.

The net ionic equations shows the equation in which all the species of the reactants and the products are in dissociated form and do not show the spectator ions which are same in the reactants and the products.

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1. Round each of the following numbers to four significant figures, and express the result in scientific notation:
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The rounding up of the aforementioned number to four significant figures is as follows: 3.002 × 10²

<h3>What are significant figures?</h3>

Significant figures are figures that contribute to the general and overall value of the whole number.

Significant figures or digits are specifically meaningful with respect to the precision of a measurement.

Although, the original number given in this question has 9 significant figures, the number; 300.235800 can be rounded up to four significant figures as follows:

  • Decimal notation: 300.2
  • No. of significant figures: 4
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Therefore, the rounding up of the aforementioned number to four significant figures is as follows: 3.002 × 10².

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