CBSE XI Science Chemistry Some Basic Concepts of Chemistry
what is stoichiometry
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25th February 2008
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Two metallic oxides contain 27.6% and 30% oxygen respectively. If the formula of the first oxide is X3O4(X is any metal) , then the formula of the second oxide will be ?
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21st April 2018
9:14 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
39?
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1st May 2018
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
?
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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1st May 2018
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
One litre of CO2 is passed through red hot coke. The volume becomes 1.4 litres at same temperature and pressure. The composition of the product is ?
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4th May 2018
6:46 AM
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NEET1 NEET1 Chemistry
Review the equation :- MnO2 + 2NaCl + 3H2SO4 → MnSO4 + 2NaHSO4 + Cl2 + 2H2O In order to get 4.48 litre of Cl2 at NTP what volume of 18M H2SO4 is needed :-
Asked by Atulcaald
15th May 2018
12:58 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
How many moles of Al2O3 will be formed when a mixture of 5.4g Al and 3.2g O2 is heated? Kindly provide the answer.
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28th May 2018
10:04 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Emperical formula of a gaseous compound is CH2Cl. 0.12 g of the compound occupies a volume of 37.20cc at 105 degree centigrade and 768mm Hg.Find the molecular formula of the compound. 2500 cc of oxygen was burnt with 600cc of ethane.Calculate the volume of unused oxygen and the volume of Carbon dioxide formed.
Asked by tps.mjmdr
20th June 2018
10:10 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
An iron ore sample is impure Fe2O3. When Fe2O3 is heated with an excess of carbon , iron metal is produced as per the following equation: Fe2O3(s)+3C(s)→2Fe(s)+3CO(g) From a sample of ore weighing 752 kg ,453 kg of pure iron was obtained.What is the % of Fe2O3 in the sample?
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15th July 2018
5:48 PM
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JEE Plances JEE (Main) Chemistry
Solve question in the image?
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30th July 2018
2:13 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Calculate mass of 50% pure limestone required to react completely with 20ml 1Molar HCL
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19th August 2018
8:14 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
The decomposition of dinitrogen pentoxide is described by the chemical equation 2 n2o5(g) → 4 no2(g) + o2(g) if the rate of disappearance of n2o5 is equal to 1.80 mol/min at a particular moment, what is the rate of appearance of no2 at that moment?
Asked by lekhakarthikeyan
26th August 2018
7:42 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
'X' forms an oxide X2O3 , 0.36 g of X forms 0.56 g of X2O3 so atomic weight of X is
Asked by Deepak
2nd September 2018
8:44 AM
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CBSE XII Science Chemistry Solutions
how many ml of 0.1M HCL are required to react completely with 1g mixture of and NaHCO3 containing equimolar amounts of both?
Asked by rakeshraghav33
18th September 2018
4:22 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
What is the amount of magnesium required to form 160 gram of magnesium oxide by burning magnesium in air
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21st September 2018
12:13 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Q) 1 g mixture of cuprous oxide and cupric oxide was quantitatively reduced to 0.839 g of metallic copper. What was the weight of cupric oxide in the original sample? (Cu = 63.5, O = 16)
Asked by Anish
7th October 2018
12:20 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
1 gram mixture of cuprous and cupric oxides was reduced to 0.839 gram metallic copper. What is the weight of cuprous oxide in sample
Asked by shahrithik07
8th October 2018
9:25 AM
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CBSE X Chemistry Chemical Reactions and Equations
what mass of magnesium oxide is formed when 120g of Mg is burnt in exess of oxygen
Asked by nathsantanukumar
30th October 2018
8:45 AM
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ICSE X Chemistry Mole Concept and Stoichiometry
What volume of oxygen at STP is required to affect combustion of 11 litres of Ethylene at 273 C and 380 mm of hg
Asked by Howisdone1
1st February 2019
3:52 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
Answer to that question
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12th February 2019
7:53 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
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12th February 2019
7:54 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
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20th March 2019
4:15 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
sulphur burns in oxygen to give sulphur dioxide. if 16 g of sulphur dioxide burns in x cc. of oxygen, calculate the amount of potassium nitrate which must be heated to produce x cc of oxygen.
Asked by drashtichauhan75
21st March 2019
7:35 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
an ecess of AgNO3 is added to 100 ml of a 0.01 M solution of dichlorotetraaquachromium (III) chloride. the number of mole of AgCl precipited would be
Asked by nitinkawadkar
26th April 2019
7:15 AM
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CBSE XI Science Chemistry
5 L of an alkane requires 25 L of oxygen for its complete combustion . If all volumes as measured at constant temperature an dpressure , the alkane is? A-Butane B-Isobutane C-Propane D-Ethane
Asked by Apoorva
27th April 2019
5:20 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Mixture of the propane and butane occupy 3 liter volume complete combustion of this mixture produced 10 liters co^2 find the constitution of this mixture
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1st May 2019
7:24 AM
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JEE Main Chemistry Some Basic Concepts in Chemistry
My doubt is 50th ques Plz solve it
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2nd May 2019
10:58 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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10th May 2019
1:28 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
1.0g of magnesium is burnt with 0.56g of oxygen in a closed vessel. Which reactant is left in excess and how much?
Asked by Diyakrishnakrupa8
15th May 2019
7:37 PM
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CBSE XI Science Chemistry Some Basic Concepts in Chemistry
Find the ratioof molar amount of H2S needed to precipitise metal ions from 20ml each of 1M Cd(NO3)2 and 0.5M CuSO4
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16th May 2019
12:05 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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Asked by pb_ckt
16th May 2019
3:44 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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16th May 2019
3:45 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
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16th May 2019
3:46 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Calculate the amount co2 that could be produced when one mole of carbon is burnt in 16g of dioxygen
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18th May 2019
6:29 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Pls solve.
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18th May 2019
11:05 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
2.45 g of KclO3 is heated to give O2 which is allowed to react completely with H2 obtained from the reaction of zinc with sulphuric acid.What is the amount of zinc required for the complete reaction?
Asked by pb_ckt
19th May 2019
11:53 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
50.0kg of N2[g] and 10.0 kg of H2 [g] are mixed to produce NH3[g] formed.Identify the limiting reagent in production of NH3 in this situaton
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21st May 2019
8:39 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
2 oxides of metal contain 50% and 40% of metal respectively. If formula of first oxide is MO then determine the formula of second oxide
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18th June 2019
9:56 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
The decomposition of a certain mass of CaCO3 gave 11.2 dm3 of CO2 gas at STP . The mass of KOH required to completely neutralise the gas is a) 56g b) 28g c) 42g d)20g
Asked by Balbir
21st June 2019
9:57 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
1 mole of ferric oxalate is oxidized by x mole of MnO4- and also 1 mole of ferrous oxalate is oxidized by y mole of MnO4- in acidic medium . The ratio (x/y) is : (a) 2:1 (b) 1:2 (c) 3:1 (d) 1:3
Asked by Balbir
30th June 2019
12:17 PM
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JEE Main Chemistry Some Basic Concepts in Chemistry
ifa piece of iron gains 10 percent of its weight due to partial rusting into fe2o3 then what is the percentage of total iron rusted
Asked by tiwariakanksha0103
24th July 2019
7:46 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
When 200 cm cube of ethylene is burnt in sufficient air to form CO2 and steam and all measurements are made at constant pressure and 100 °C how do we calculate unreacted air?
Asked by minhaalms
25th July 2019
1:04 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Air contains 20% oxygen by volume how much volume of air will be required for combustion of 100 cc acetylene Why we use at last as 100/20*250
Asked by gchoudhary2697
4th August 2019
9:55 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Calculate the mass of potassium chlorate required to liberate 6.72dmcube of oxygen at step.Molar mass of potassium chlorate is 122.5g mol inverse Ans.24.5g
Asked by aniketbele4084
10th August 2019
12:00 AM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
Solve it Sir ji
Asked by brijk456
16th August 2019
9:17 AM
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ICSE X Chemistry Mole Concept and Stoichiometry
What volume of oxygen at STP is required to affect the combustion of 11 litres of ethylene [C2H4] at 273o C and 380 mm of Hg pressure? C2H4+3O22CO2 + 2H2O
Asked by aashimegh
4th September 2019
8:37 AM
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ICSE X Chemistry Mole Concept and Stoichiometry
A mixture of hydrogen and chlorine occupying 36 cm3 was exploded. On shaking it with water, 4cm3 of hydrogen was left behind. Find the composition of the mixture.
Asked by aashimegh
4th September 2019
8:53 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Phosphorus pentachloride decomposes according to this equation. PCl5(g) equilibrium reaction arrow PCl3(g) + Cl2(g) An equilibrium mixture in a 5.00 L flask at 245°C contains 4.27 g of PCl5, 9.31 g of PCl3, and 2.86 g of Cl2. How many grams of each will be found if the mixture is transferred into a 2.00 L flask at the same temperature.
Asked by amangeneralstore27
21st December 2019
11:25 AM
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CBSE IX Chemistry Atoms and Molecules
how many litres of steam will be formed from 2L of H2 and 1L of O2 if all volumes are present in same temperature and pressure temperature temperature a
Asked by tarunvignesh2005
12th January 2020
5:46 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
carbon react with chlorine to form ccl4 .36gm of carbon was mixed with 142gmof ccl2.calculate mass of ccl4 produce and remaining mass of reactant
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16th February 2020
5:46 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
please answer this
Asked by Prashant DIGHE
16th February 2020
10:09 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
25ml of a solution containing HCl was treated with excess of M/5 KIO3 and KI solution of unknown concentration where I2 liberated is titrated against a standard solution of 0.021M Na2S2O3 solution whose 24ml were used up. Find the strength of HCl and volume of KIO3 solution consumed.
Asked by abhishekangadi2002
2nd April 2020
12:46 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
What is the volume of O2 (g) required at STP for the oxidation of 1L of SO2(g) at 298K and 1atm ? 2SO2(g) + 2O2(g) -> 2SO3 (g)
Asked by nisharameshkv
16th April 2020
12:23 AM
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CBSE XI Science Chemistry Some Basic Concepts in Chemistry
Solve this pls
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12th May 2020
8:23 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Please solve the qustion in the attachment
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15th May 2020
10:37 PM
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CBSE XI Science Chemistry Some Basic Concepts in Chemistry
what volume of 5M Na2so4 must be added to 25ml of 1M Bacl2 solution to produce 10g Baso4
Asked by ashutosharnold1998
18th May 2020
12:25 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
give answer
Asked by harshilthakkarhhhhhh
21st May 2020
4:37 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
2g Feso4 is completely oxidised by 0.05M kmno4.what volume of kmno4 is required？
Asked by nareshrajpurohit43109
22nd May 2020
11:18 AM
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CBSE X Chemistry Chemical Reactions and Equations
10g of hydrogen is brunt in the presence of excess oxygen . The mass of water formed is
Asked by gharatpooja70
22nd June 2020
8:22 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Hello sir, please clarify my doubt. can you explain me in detail about stoichiometry and limiting reagents with examples for each. Thank you.
Asked by seeni2005
28th July 2020
11:03 AM
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JEE Main Chemistry Some Basic Concepts in Chemistry
How many gram of sulfuric acid is required to produce 20g of hydrogen?
Asked by ayushmishradbb
21st November 2020
1:38 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
When lead sulphide, PbS and lead oxide, PbO, are heated together the products are lead metal and sulphur dioxide, SO2.
PbS(s) + 2PbO(s)
3Pb (l) + SO2 (g).
If 14.0 g of lead oxide reacts according to the above equation, how many (a) moles of lead (b) grams of lead, (c) atoms of lead and (d) grams of sulphur dioxide are formed?
(Atomic mass : Pb = 207.0, S = 32.1 ; O =16.0)
3Pb (l) + SO2 (g).
Asked by seeni2005
24th February 2021
12:34 PM
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ICSE X Chemistry Mole Concept and Stoichiometry
what is stoichiometry in simple word?
Asked by amit.clw4
14th March 2021
8:12 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
How many gram of nh3 will be produce when 50g N2 react with h2
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7th June 2021
4:36 PM
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JEE Main Chemistry Some Basic Concepts in Chemistry
what is stochionetry
Asked by cutiepieanshii39
28th June 2021
2:32 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
Calculate the mass of 50% H2SO4 required to decompose 10 g of CaCO3
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30th June 2021
4:54 PM
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JEE Main Chemistry Some Basic Concepts in Chemistry
What weight (in gg) of Na2CO3Na2CO3 of 80% purity would be required to neutralise 50mL50mL of 0.8MHCl0.8MHCl acid?
Asked by atharv2703123
6th February 2022
4:39 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
suppose the elements X and Y combine to form two compounds XY2 and X3Y2. 0.1 mol weighs XY2 weighs 10g while 0.05 mol X3Y2 weighs 9g the atomic masses of X and Y are
Asked by solagamsudharani1234
29th June 2022
11:35 AM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
The maximum number of molecules is present in. (a) 15 L of H2 gas at STP (b) 5 L of N2 gas at STP. (c) 1.5 g of H2 gas (d) 5 g of O2 gas
Asked by kdimple765
17th July 2022
1:24 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
what is the mass of glucose required to produce 44grams of CO2 on complete combustion
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17th July 2022
10:28 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
0.315g of organic compound gave on combustion 0.4131g of water and 0.6732g of carbon dioxide calculate the percentage of carbon and hydrogen
Asked by mallikarjunasangi28
22nd July 2022
7:57 PM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
What is actual mass
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29th July 2022
9:42 PM
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JEE Main Chemistry Some Basic Concepts in Chemistry
calculate weight of calcium react with 6.2gm phosphorus in calcium phoshide(ca3p2)
Asked by aryankatiyar223
10th August 2022
11:57 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
1 mol of ferric oxalate is oxidised by x mol of MnO4− and also one mol of ferrous oxalate is oxidised by y mol of MnO4− in acidc medium . ratio x/y is ? answer in simple words pleasee
Asked by hcnainwal
15th June 2023
10:39 AM
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JEE Main Chemistry Some Basic Concepts in Chemistry
to prepare one litre solution of NaOH of ph 12 the required amount of aOH is
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6th November 2023
10:31 AM
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NEET NEET Chemistry Some Basic Concepts in Chemistry
25ml of a solution of barium hydroxide on titration with a0.1molar solution of HCl gave titre value of 35mL. The molarity of barium hydroxide solution was
Asked by tarasingrathod63
7th April 2024
1:07 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
what volume of 0.2 M sulfuric acid is required to neutralize 25ml of 0.1 NaOH solution?
Asked by omniscientnjf2021
7th April 2024
10:18 PM
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CBSE XI Science Chemistry Some Basic Concepts of Chemistry
what is stotiometery
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15th April 2024
7:45 AM
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