Answer all the question
Download as ppt, pdf0 likes295 views
The document provides information to determine the empirical and molecular formulas of several compounds: melamine has an empirical formula of C3H6N6 and molecular formula of C3H6N6; the empirical formula of an iron oxide is FeO; the formula of aluminum oxide formed from the burning of aluminum is Al2O3; the molecular formula of a compound with an empirical formula of (CH3)n and molecular formula mass of 30 is C2H6; the molecular formula of benzene which has an empirical formula of CH and relative molecular mass of 78 is C6H6.
![ANSWER ALL THE QUESTION
1. Melamine is an organic compound that
contains 28.57% of carbon , 4.76% of
hydrogen,and 66.67% of nitrogen.
[Relative atomic mass : H = 1, C =12, N = 14]
a)Determine the empirical formula of melamine
b) If the relative molecular mass of melamine
is126, find the molecular formula of Melamine](https://image.slidesharecdn.com/answerallthequestion-130310040427-phpapp01/85/Answer-all-the-question-1-320.jpg)
![2. 1.69g of iron combine with 0.72 g of
oxygen. Calculate the empirical formua of
this oxide
[Relative atomic mass: Fe = 56 , O= 16]
3. 0.91g of aluminium burns in air to form
1.7 g of aluminium oxide. What is the
formula of aluminium oxide
[Relative atomic mass Al = 27, O=16]](https://image.slidesharecdn.com/answerallthequestion-130310040427-phpapp01/85/Answer-all-the-question-2-320.jpg)
Answer all the question
- 1. ANSWER ALL THE QUESTION 1. Melamine is an organic compound that contains 28.57% of carbon , 4.76% of hydrogen,and 66.67% of nitrogen. [Relative atomic mass : H = 1, C =12, N = 14] a)Determine the empirical formula of melamine b) If the relative molecular mass of melamine is126, find the molecular formula of Melamine
- 2. 2. 1.69g of iron combine with 0.72 g of oxygen. Calculate the empirical formua of this oxide [Relative atomic mass: Fe = 56 , O= 16] 3. 0.91g of aluminium burns in air to form 1.7 g of aluminium oxide. What is the formula of aluminium oxide [Relative atomic mass Al = 27, O=16]
- 3. 3. The empirical formula of ethene is (CH 3)n. Its molecular formula mass is 30. Calculate the formula of this compound 4. The empirical formula of benzene is CH. If its relative molecular mass is 78. what is its molecular formula