Help Contact For teachers and institutes

Mock Tests Classes

StemPy Lab

Learn. Solve. Code the solutions. Test yourself.

Live examsFree mock exams, timed and rankedEveryone starts together, and your score and rank come the moment it ends.See the exams →

Learn

Physics
Chemistry
Mathematics
Biology
Python Programming
Statistics & Data Science
Classes
Groups

Practice

Problems
Quizzes
Mock Tests
Prepare for an Exam
Question Sets
Exams
Certificates
Python Labs
AI Practice Generator
Student-Created Tests

Community

Discussions
Resources
Notes
Blog

Account

Log in

© 2026 senLearn. All rights reserved.Help About Contact Privacy Policy Terms of Use Refund Policy

In a Dumas determination, 0.75 g of a compound gives 84… | StemPy Lab

Quizzes
In a Dumas determination, 0.75 g of a compound gives 84 mL of nitrogen at STP. What per cent of the compound is nitrogen?

ChemistryMediumHigh School (11–12)Organic Chemistry: Some Basic Principles and Techniques › Purification and Analysis of Organic Compounds NEET A-Level IB

Created by StemPy Lab

In a Dumas determination, $0.75\ \text{g}$ of a compound gives $84\ \text{mL}$ of nitrogen at STP. What per cent of the compound is nitrogen?

← All Quizzes

← Methyl bromide reacts with aqueous alkali: CH₃Br + OH⁻ → CH₃OH + Br⁻. What type of reaction is this?In the Kjeldahl method, potassium sulphate is added to the concentrated sulphuric acid. Why? →

More onOrganic Chemistry: Some Basic Principles and Techniques › Purification and Analysis of Organic Compounds

Discussion (0)

Log in to join the discussion.

Loading…

More questions on this topic

A chlorine compound holds 37.2 % carbon, 7.8 % hydrogen and 55.0 % chlorine. Taking Cl as 35.5…Hard
In the apparatus used to find the per cent of carbon, which substance absorbs the carbon dioxide?Easy
In the Kjeldahl method, potassium sulphate is added to the concentrated sulphuric acid. Why?Medium
Methyl bromide reacts with aqueous alkali: CH₃Br + OH⁻ → CH₃OH + Br⁻. What type of reaction is this?Easy
In the test for phosphorus, the compound is first heated with sodium peroxide. What does this do?Medium

All questions on this topic →

Problems on this topic

A compound has 54.5 % carbon, 9.1 % hydrogen and 36.4 % oxygen…Hard
A 0.185 g sample of an organic compound is heated in a Carius tube with fuming nitric acid and…Medium
The ammonia from 0.45 g of a compound is passed into 40 mL of 0.10 mol/L sulphuric acid…Hard
In a Dumas determination, 0.28 g of a compound gives 43 mL of nitrogen…Hard

All problems on this topic →