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Recent questions tagged stoichiometry and the mole concept
Questions
If ten volume of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced ?
sat
chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
If the speed of lights is $3.0 \times 10^{8}\;ms^{-1}$. calculate the distance covered by light in 2.00 ns
sat
chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
If the density of methanol is $0.793\; kg L^{-1}$ what is its volume needed for making 2.5 L of its $0.25\;M$ solution ?
sat
chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
One mole of $H_2O$ equals
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chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
Relative molecular masses can be calculated
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chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
__________ is mass of a particular substance divided by the total mass of all the substances present in the mixture or solution.
sat
chemistry
stoichiometry and the mole concept
asked
Jul 5, 2018
by
meena.p
1
answer
A pseudo molecular weight computed by dividing the mass in a mixture or solution by the number of moles in the mixture or solution is called
sat
chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
$40\; gms$ of $NaOH$ contains
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chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
58.5 gms of NaCl contains
sat
chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
Amount of substance containing $6.022 \times 10^{23}$ entities is called
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chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
We don`t use volume balance in a chemical process because
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chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
The law of _____________ states that chemical reactions proceed with fix ratios of the number of reactant and products and products involved in the reaction.
sat
chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
The given statement for stoichiometry is “Stoichiometry provides a quantitative means of relating the amount of products produced by a chemical reaction to amount of reaction and vice versa."
sat
chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
Nitric acid formation reaction is given as below $3NO_2 + H_2O \to 2HNO3 + NO$ The given reaction is
sat
chemistry
stoichiometry and the mole concept
asked
Jul 4, 2018
by
meena.p
1
answer
A 12.0 of gas sample of gas occupies $19.2\;L$ at STP. what is the molecule weight of this gas ?
sat
chemistry
stoichiometry and the mole concept
asked
Jul 3, 2018
by
meena.p
1
answer
A molar solution is one that contains one mole of a solute in
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chemistry
stoichiometry and the mole concept
asked
Jul 3, 2018
by
meena.p
1
answer
Which one of the following pairs of gases contains the same number of molecules
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chemistry
stoichiometry and the mole concept
asked
Jul 3, 2018
by
meena.p
1
answer
How much copper can be obtained from 100 g of copper sulphate $(CuSO_4)?$ (Atomic mass of $Cu=63.5\;amu$)
sat
chemistry
stoichiometry and the mole concept
asked
Jul 3, 2018
by
meena.p
1
answer
Calculate the mass of sodium acetate $(CH_3COONa)$ required to make 500 mL of $0.375$ molar aqueous solution . Molar mass of sodium acetate is $82.0245\;g\;mol^{-1}$
sat
chemistry
stoichiometry and the mole concept
asked
Jul 3, 2018
by
meena.p
1
answer
$60\;cm^3$ of oxygen was added to $24\;cm^3$ of carbon monoxide and the mixture is ignited. calculate (i) the volume of oxygen used up (ii) the volume of carbon dioxide fromed .
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chemistry
stoichiometry and the mole concept
asked
Jul 2, 2018
by
meena.p
1
answer
From the equation :$N_2+3H_22NH_3$ calculate the volume of ammonia gas formed when 6 litres of hydrogen reacts with excess of nitrogen , all volumes being measured at $STP$
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chemistry
stoichiometry and the mole concept
asked
Jul 2, 2018
by
meena.p
1
answer
Which ones of the following statements are true for 2 moles $CO_2$ compound. (Avogadro's Number $=6,02 \times 10^{23})$
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chemistry
stoichiometry and the mole concept
asked
Jul 2, 2018
by
meena.p
1
answer
How many moles of molecule are present in 15 g of $C_2H_4$(ethylene) . Given atomic mass of $C=12.0\;amu$ and of $H=1.0\;amu$
sat
chemistry
stoichiometry and the mole concept
asked
Jul 2, 2018
by
meena.p
1
answer
Calculate the number of molecules present in 34.20 grams of cane sugar $(C_{12}H_{22}O_{11})$
sat
chemistry
stoichiometry and the mole concept
asked
Jul 2, 2018
by
meena.p
1
answer
The density of salt solution is $1.13\;g\;cm^{-3}$ at $298\;k$. The solution contains $17.0 \%$ sodium chloride . What volume of solution will contain $38.42 \;g$ of $NaCl$?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
difficult
asked
Apr 1, 2014
by
meena.p
1
answer
How many g of KCl would have to be dissolved in $60\;g\; H_2O$ to give $20\%$ by weight of solution ?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Apr 1, 2014
by
meena.p
1
answer
A balanced chemical equation is in accordance with
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
easy
asked
Mar 28, 2014
by
meena.p
1
answer
A certain compound has the molecular formula $X_4O_6$.If 10.0g of compound contains 6.06g of X,the atomic mass of $X$ is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
The weight of one molecule of a compound $C_{60}H_{122}$ is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
19.7Kg of gold was recovered from a smuggler. How many atoms of gold were recovered? ( at. mass. of Au = 197 )
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
A signature written with carbon pencil weighs 1mg.What is the number of carbon atoms present in signature?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
Volume occupied by 4.4g of $CO_2$ is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
The percentage of oxygen in NaOH is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
percentage-composition
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
The number of gram atoms of oxygen present in 0.3 gram mole of $H_2C_2O_4.2H_2O$(oxalic acid) is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
The total number of electrons in one molecule of carbon dioxide is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
easy
asked
Mar 21, 2014
by
meena.p
1
answer
$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of acid that contains 63g pure acid.
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q197
easy
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
Insulin contains 3.4% sulphur.The minimum mol weight of insulin is :
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
mole-concept-and-molar-masses
q51
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
Number of $H^+$ ions in 100ml of 0.001M $H_2SO_4$ is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q47
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
Amount of oxygen required for complete combustion of 27g Al is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
laws-of-chemical-combinations
q42
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
Calculate molality of 1 litre solution of $93\%$ $H_2SO_4$ by volume.The density of solution is $1.84\; g$ $mL^{-1}$
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q23
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
A 6.90M solution of KOH in water has 30% by weight of KOH. Calculate the density of the solution.
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q22
difficult
asked
Jan 7, 2014
by
sreemathi.v
1
answer
0.5g of a mixture of $K_2CO_3$ and $Li_2CO_3$ required 30ml of 0.25N HCl solution for neutralization.What is % composition mixture ?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q10
difficult
asked
Nov 6, 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
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q99
medium
asked
Oct 31, 2013
by
sreemathi.v
1
answer
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
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
3.0mole NaOH solution has a density of 1.110g/ml.The molarity of the solution is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q73
medium
asked
Oct 29, 2013
by
sreemathi.v
1
answer
If $a_k$ is the coefficient of $x^k$ in the expansion of $(1+x+x^2)^n$ for $k=0,1,2.......,2n$ then $a_1+2a_2+3a_3+.....+2na_{2n}$ is equal to
sat
chemistry
stoichiometry and the mole concept
jeemain
eamcet
math
2007
q9
asked
Oct 24, 2013
by
meena.p
1
answer
Insulin contains 3.4% sulphur.Then the minimum molecular mass of the insulin is about
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
atomic-and-molecular-masses
q3
medium
asked
Oct 22, 2013
by
sreemathi.v
2
answers
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