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Recent questions tagged mole-concept-and-molar-masses
Questions
Calculate the number of atoms of oxygen present in 88g $CO_2$.What would be the weight of CO having the same no of oxygen atoms ?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q92
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
Calculate molecules of methane,C and H atoms in 25g methane
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q90
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is 38.3 at $27^{\large\circ}C$.Calculate the mole of $NO_2$ in 100g mixture
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q89
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
Find the number of g-molecules of oxygen in $6.023\times 10^{24}$ CO molecules
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q18
easy
asked
Oct 30, 2013
by
sreemathi.v
1
answer
How many moles of electron weigh one kilogram ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q87
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
How many EDTA (ethylene diamine tetracetic acid)molecules are required to make an octahedral complex with a $Ca^{2+}$ ion ?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q16
easy
asked
Oct 30, 2013
by
sreemathi.v
2
answers
How many moles of magnesium phosphate $Mg(PO_4)_2$ will contain 0.25 mole of oxygen atom ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q83
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
If $\large\frac{1}{6}$, in place of $\large\frac{1}{12}$ mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q82
medium
asked
Oct 30, 2013
by
sreemathi.v
1
answer
$8g$ of sulphur are burnt to form $SO_2$,which is oxidized by $Cl_2$.The solution is treated with $BaC_2$ solution.The amount of $BaSO_4$ percipitated is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q79
medium
asked
Oct 29, 2013
by
sreemathi.v
1
answer
Total number of atoms present in $1.0cm^3$ of solid urea (density 0.3g/$cm^3$) at $25^{\large\circ}$ are
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q13
easy
asked
Oct 28, 2013
by
sreemathi.v
1
answer
If molecular weight of glucose-1-phosphate is 260 and its density is 1.5g $cm^{-3}$ ,what is the average volume occupied by 1 molecule of this compound ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q63
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
Amount of oxygen required for combustion of 1kg of a mixture of butane and isobutane is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q61
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
$6.02\times 10^{20}$ molecules of urea are present in 100ml solution.The concentration of urea solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q59
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
In compound $C,H,N$ atoms are present in 9 : 1 : 35 by weight .Molecular weight of compound is 108.It molecular formula is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q56
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
Number of atoms in 558.5g $Fe$ (at.wt =55.85) is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q55
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
On repeated sparking 10ml of mixture of carbon monoxide and nitrogen required 7ml of oxygen for combustion of CO and $N_2$ to $CO_2$ and NO.The volume of nitrogen in mixture is (all volumes are measured under identical conditions).
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q53
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
One mole of potassium chlorate is thermally decomposed excess of aluminum is burnt in the gaseous product .How many mole of aluminum oxide are formed?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q51
medium
asked
Oct 28, 2013
by
sreemathi.v
1
answer
If half mole of oxygen combine with Al to form $Al_2O_3$,the weight of Al used in the reaction is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q50
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
Number of ions present in 2.0 litre of a solution of $0.8MK_4Fe(CN)_6$ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q48
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
The mole fraction of water in 20% aqueous solution of $H_2O_2$ is :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q47
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
In nature,abundance of $^1H_1$ and $^2H_1$ are 99.985 and 0.015 percent respectively and water obtained from it contains $H_2O$ and $D_2O$.The number of $D_2O$ molecules in 400mL water (if density is assumed to be 1.0g/mL) will be :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q41
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
A silicon (atomic weight=28) chip used in an integrated circuit of a microcomputer has a mass of 5.68 mg. How many silicon (Si) atoms are present in this chip.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q39
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
In the first world war ,$1.1\times 10^8$kg of position gas were fired on the allied forces.If the gas is assumed to be phosgene,how many molecules of the gas correspond to the amount fired on allied forces.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q38
medium
asked
Oct 25, 2013
by
sreemathi.v
1
answer
Chlorophyll,a green coloring matter contains 2.68% mg.The number of atoms of mg present 1g chlorophyll are
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q36
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
224 ml of triatomic gas weights 1g at 173k and 1atm .The mass of one atom of this gas is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q34
medium
asked
Oct 24, 2013
by
sreemathi.v
1
answer
How many years it would take to spend one Avogadro's number of rupees at a rate of 10lakh of rupees in one second
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q10
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
How many electrons are present in 1.6g of methane?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q8
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
How many molecules of atoms of oxygen are present in 5.6 litres of oxygen $(O_2)$ at NTP?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q7
medium
asked
Oct 23, 2013
by
sreemathi.v
1
answer
From 200mg of $CO_2,10^{21}$ molecules are removed.How many moles of $CO_2$ are left?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q6
medium
asked
Oct 22, 2013
by
sreemathi.v
1
answer
What is the mass of $3.01\times 10^{22}$ molecules of ammonia?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q5
medium
asked
Oct 22, 2013
by
sreemathi.v
1
answer
How many molecules of water and oxygen atoms are present in 0.9g of water?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q4
medium
asked
Oct 22, 2013
by
sreemathi.v
1
answer
116 mg of a compound on vaporization in Victor mayer's apparatus displaces 44.8 ml of air measured at STP.The molecular mass of the compound is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q1
medium
asked
Oct 22, 2013
by
sreemathi.v
1
answer
Which has the maximum number of atom
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q10
easy
asked
Oct 22, 2013
by
sreemathi.v
1
answer
A piece of copper weighs $0.635g.$How many atoms of copper does it contain?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q4
easy
asked
Oct 22, 2013
by
sreemathi.v
1
answer
$25g$ of $MCl_4$ contains $0.5\;mol$ chlorine then its molecular mass is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q3
easy
asked
Oct 22, 2013
by
sreemathi.v
1
answer
The maximum number of molecules present in :
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q2
easy
asked
Oct 22, 2013
by
sreemathi.v
1
answer
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