Relative molecular mass and percentage composition
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
![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]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)