1) Explain the molecular mass of C2H5OH.
2) Explain the law of constant proportion.
3) Explain the difference of O2 and 2O.
4) Find the no. of moles i. 7g of Na
5) What is the atomicity of ca(OH)2. 6) Write the for aluminium chloride. 7) State the dufference between sodium atom and sodium ion.
8)What is the formula unit mass? how is it different from molecular mass? 9) Define valency and give valency of copper and iron. 10) Calculate the mass of one molecule of chlorine.
( each question carries 2 marks)
Answers
Answer:
The chemical bond formed between the two atoms by manual sharing of the pair of the valence electrons so that both of them can attend a cell and depleted in the valency cell is called covalent bond the perfect score is used to indicate when things are equal or jointed for example coexist to corporate extra hair Sach atoms contribute one electron from the valency shell for the pounding therefore the name covalent is given equal valency electrons contribute for this bounds
Explanation:
Answer:
The chemical bond formed between the two atoms by manual sharing of the pair of the valence electrons so that both of them can attend a cell and depleted in the valency cell is called covalent bond the perfect score is used to indicate when things are equal or jointed for example coexist to corporate extra hair Sach atoms contribute one electron from the valency shell for the pounding therefore the name covalent is given equal valency electrons contribute for this bounds
Explanation: