Download App

Mole Concept And Stoichiometry — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryMole Concept And Stoichiometry3 Marks
Question
If the hydrogen sample contains N molecules, how many molecules are present in oxygen sample?
✓

Answer

Amount of hydrogen and oxygen gases is same $=2 g$
So, for oxygen $32 g$ of gas has $= N$ molecules
Then, $2 g$ of gas has $= N / 32 \times 2=16$
No of molecules of oxygen $= N / 16$.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[3 Mark Question Answer]" from Mole Concept And Stoichiometry→Mole Concept And Stoichiometry — all question types→Chemistry STD 10 question papers→ICSE Board STD 10 question papers→ICSE Board question paper generator→

Similar questions

Write the observation and name of the product for the following
(i) When ethene is passed in bromine solution in $CCl_4.$
(ii) When Baeyers reagent reacts with ethene.
→
Give two balanced reactions of each type to show the following properties of sulphuric acid:
Non-volatile nature
→
In a chemistry lab, a student is given a solution containing an unknown cation. The student adds sodium hydroxide (NaOH) to the solution and observes the formation of a blue precipitate. The student then decides to add ammonium hydroxide to a fresh sample of the solution in excess.
(a) Identify the cation.
(b) What happens when excess of NaOH is added in the solution?
(c) What happens when excess of ammonium hydroxide is added to the solution?
→
By giving four examples in each case, define or explain the terms (a) strong electrolyte (b) weak electrolyte.
→
Copy and complete the following equations:
$(a) AlN + H_2O \rightarrow$
$(b) 2NH_3 + 3PbO \rightarrow$
$(c) NH_3 +3Cl_2 \rightarrow$
$(d) NH_3 + CO_2 \rightarrow$
(i) Which property of ammonia is illustrated by equation (c)?
(ii) What important fertilizer is prepared from equation (d)? State the conditions
→
Look at the following reaction :
A. Nitrogen + metal → compound X
B. X + water → ammonia + another compound
C. Ammonia + metal oxide → metal + water + N2
(i) One metal that can be used for reaction in A is magnesium.
(a) Write the formula of the compound X, that is formed.
(b) Write the balanced equation for reaction B, where Xis the compound formed.
( c) Which property of ammonia is demonstrated by reaction C?
→
What do you observe when Ammonium solution is added to ferric chloride solution.
→
If phosphorus is considered to contain $P_4$ molecules, then calculate the number of moles in $100g$ of phosphorus?
→
(a) With the help of equations, give an outline for the manufacture of sulphuric acid by the contact process.
(b) What property of sulphuric acid is shown by the reaction of concentrated sulphuric acid when heated with
(i) Potassium nitrate (ii) Carbon
→
An organic compound, whose vapour density is $45,$ has the following percentage composition $H =2.22 \%, O =71.19 \%$ and remaining carbon. Calculate,
(a) its empirical formula, and
(b) its molecular formula
→