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अर्कज ..
Subject: Chemistry
, asked on 24/5/18
Explain:
Answer
2
अर्कज ..
Subject: Chemistry
, asked on 24/5/18
Explain:
Answer
1
Ghosh Brothers
Subject: Chemistry
, asked on 24/5/18
H2O2 is sold as a solution of approximately 5 grams of H2O2 per 100 ml of solution. The of molarity of the solution is approximately ?
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
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Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
Solve this:
Answer
1
अर्कज ..
Subject: Chemistry
, asked on 23/5/18
EXAMPLE 18 Calculate equivalent mass of (a) HNO
3
(b) H
2
SO
4
(c) H
3
PO
4
(d) NaOH q (e)
EXAMPLE 19 Calculate equivalent mass of H
3
PO
4
if, H
3
PO
4
+2NaOH
→
Na
2
HPO
4
+2H
2
O
Answer
1
Yatharth Patel
Subject: Chemistry
, asked on 22/5/18
Q.4. The vapour density of a gas is 11.2. Calculate the volume occupied by 11.2 g of the gas at NTP.
[
Hint:
Mol. wt. = 2
×
VD]
(11.2 litres)
Answer
1
Yatharth Patel
Subject: Chemistry
, asked on 22/5/18
Plz solve q 7 nd q8
Q7. Find the total number fo nucleons present in 12 g of
12
C atoms. (12 × 6.022 × 10
23
)
Q8. Find (i) the total number of neutrons, and (ii) the total mass of neutrons in 7 mg of
14
C. (Assume that the mass of a neutron = mass of a hydrogen atom)
[ Hint : 1
14
C atom contains 8 neutrons.]
(24.088 ×10
20
0.004 g)
Answer
1
Ghosh Brothers
Subject: Chemistry
, asked on 22/5/18
if 0.22 gram of a substance when vaporized displaced 45 cm cube of air measured over Water at 293 Kelvin and 755mm pressure and if vapour pressure of H2O is 17.4mm then a molecular weight of substance will be
Answer
1
Asheesh Kumar
Subject: Chemistry
, asked on 21/5/18
Please help me in this question -
Q.22. By the reaction of carbon and oxygen, a mixture of CO and
C
O
2
is obtained What is the composition by mass of the mixture obtained when 20 g of
O
2
reacts with 12 g of carbon?
Answer
1
1
2
3
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What are you looking for?
EXAMPLE 19 Calculate equivalent mass of H3 PO4 if, H3 PO4 +2NaOH Na2HPO4 +2H2 O
[Hint: Mol. wt. = 2VD]
(11.2 litres)
Q7. Find the total number fo nucleons present in 12 g of 12C atoms. (12 × 6.022 × 1023)
Q8. Find (i) the total number of neutrons, and (ii) the total mass of neutrons in 7 mg of 14C. (Assume that the mass of a neutron = mass of a hydrogen atom)
[ Hint : 1 14C atom contains 8 neutrons.]
(24.088 ×1020 0.004 g)
Q.22. By the reaction of carbon and oxygen, a mixture of CO and is obtained What is the composition by mass of the mixture obtained when 20 g of reacts with 12 g of carbon?