2.5 piece of lithium is dropped into a 500 g sample of water at 22.1 C.ten temperature of the water increases to 23.5 C. How muc
1 answer:
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Answer :
(a) The given number in 2 significant figures will be,
(b) The given number in 4 significant figures will be,
(c) The given number in 3 significant figures will be,
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.
(a) The given number 00003554 converted into 2 significant figures.
In 00003554, there are 4 significant figures. Now we have to convert it into 2 significant figures.
The given number in 2 significant figures will be,
(b) The given number 35.8348 converted into 4 significant figures.
In 35.8348, there are 6 significant figures. Now we have to convert it into 4 significant figures.
The given number in 4 significant figures will be,
(c) The given number 22.4555 converted into 3 significant figures.
In 22.4555, there are 6 significant figures. Now we have to convert it into 3 significant figures.
The given number in 3 significant figures will be,
86.66 % by weight of ascorbic acid in the tablet, when 0. 1220 g vitamin c tablet was dissolved in acid. This required 11. 50 ml of 0. 01740 m to reach the endpoint.
A balanced chemical reaction is an equation that has equal numbers of each type of atom on both sides of the arrow.
→
So, the balanced chemical equation for the reaction will be:
→
That means, 3 mol of of ascorbic acid reacts with 1 mol of
Moles of available is 0.0174 X 0.0115 =0.0002001 mol
Moles of ascorbic acid to be yielded should be 3 X 0.0002001 =0.0006003
So, percent mass of ascorbic acid in the tablet will be:
(0.1057 / 0.1220) X 100 %
=86.66 %
Hence, the third option is the correct answer.
Learn more about balanced chemical equations here:
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