18.0 gmol-1
22,4gmol-1
28.0gmol-1
36.0 gmol-1
Correct answer is C
Imole Q occupies 22400 cm3
x mole occupies 800 cm3
x = \(\frac{800 x 1}{22400}\)
= 0.036mol
Molar mass = Mass ÷ Mole
= 1 ÷ 0.036
Molar mass ≈ 28 g/mol
600cm-3
625cm3
10003
1600 cm 3
Correct answer is B
Mole = 5/40 = 0.125 mole
:. 0.2 mole NaOH dissolved in 1000 cm3
0.125 mole NaOH dissolved in xcm3
xcm3 = \(\frac{0.215 x 1000}{0.2}\)
= 625cm3
The oxidation number of sulphur in Fe2(SO4)3 is
+2.
+3
+4.
+6.
Correct answer is D
Fe2(SO4)3 = 0
(+3 x 2) 9 3x + (-2 x 4 x 3) = 0
+6 + 3x -24 = 0
+3x - 18 = 0
3 x = 18
x = 18/3 = +6
1:1
2:1
1:4
8:1
Correct answer is B
Mole = \(\frac{Mass}{Molar Mas}\) : \(\frac{Mass}{Molar Mass}\)
\(\frac{0.256}{2}\) : \(\frac{2}{32}
0. 128 : 0.0625
\(\frac{0.128}{0.0625}\) : \(\frac{0.0625}{0.0625}\)
2 : 1
An aqueous solution of Na2CO3 is
acidic
alkaline
amphoteric
neutral
Correct answer is B
No explanation has been provided for this answer.