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leonid [27]
2 years ago
7

What is the answer, with the correct number of significant figures, for this problem? 4.392g + 102.40g + 2.51g =_______.

Chemistry
1 answer:
MrRa [10]2 years ago
7 0

Answer : The correct answer will be, 109.30g

Explanation :

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the addition and subtraction is :

The least precise number present after the decimal point determines the number of significant figures in the answer.

The given expression is:

4.392g+102.40g+2.51g

\Rightarrow 109.302g

In the given expression, 4.392 has 4 significant figures, 102.40 has 5 significant figures and 2.51 has 2 significant figures. From this we conclude that least precise number present after the decimal point is 2.

Thus, the answer will be 109.30g

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72.8 x ( 6.02x10²³) / 40.078 =

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An Equilibrium with Cobalt Complex Ions.Investigate the equilibrium between two different complex ions of cobalt. The reaction i
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<u>Explanation</u>:

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Pink cobalt species + chloride particles ⇌ Blue cobalt species + water molecules  

  • The response of [Co(H2O)6]2+(aq) + 4Cl–(aq) → [CoCl4]2–(aq) + 6H2O(l) is endothermic. In this manner, as per Le Chatelier's rule, when the temperature is raised, the situation of the balance will move to one side, shaping a greater amount of the blue complex particle at the expense of the pink species.  
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A Cellulose not digested by humans.

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Explanation:

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