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Percentage Composition
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the amount of agarose required to prepare 250 of 0
Question:
The amount of agarose required to prepare 250 ππΏ of 0.8% agarose gel is _______ πππππ (rounded off to the nearest integer).
IIT JAM BT - 2024
IIT JAM BT
Updated On:
Oct 23, 2024
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Correct Answer:
2
Solution and Explanation
The Correct answer is :2
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Top Questions on Percentage Composition
Match List I with List II
LIST I
LIST II
A
.
\(K_2SO_4(aq)\)
with 60% dissociation
I
.
\(i =3.7\)
B
.
\(K_3[Fe(CN)_6](aq)\)
with 90% dissociation
II
.
\(i= 1.8\)
C
.
\(AlCl_3 (aq)\)
with 80% dissociation
III
.
\(i=2.2\)
D
.
\(K_2HgI_4 (aq)\)
with 40% dissociation
IV
.
\(i= 3.4\)
Choose the correct answer from the options given below:
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Convert the following into basic units:
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The following data are obtained when dinitrogen and dioxygen react together to form different compounds:
Mass of dinitrogen Mass of dioxygen
(i) 14 g 16 g
(ii) 14 g 32 g
(iii) 28 g 32 g
(iv) 28 g 80 g
Which law of chemical combination is obeyed by the above experimental data? Give its statement.
Fill in the blanks in the following conversions:
(i)1 km = ...................... mm = ...................... pm
(ii) 1 mg = ...................... kg = ...................... ng
(iii) 1 mL = ...................... L = ...................... dm
3
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Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g mL
β1
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A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives 3.38 g carbon dioxide, 0.690 g of water and no other products. A volume of 10.0 L (measured at STP) of this welding gas is found to weigh 11.6 g. Calculate:
empirical formula,
molar mass of the gas, and
molecular formula
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