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1. Which of the following groups contains pure substances only? A) plastic, rubber, glass B) cement, paper, brass C) sugar, steam, salt D)coal, butter, milk 2. Which of the following is true for compounds and not true for elements? A) Compounds can chemically combine with other...

how to ask a girl out???????/:mad1:

maths online is shit:.Its only for those who dont use books :spam: COMMENTS PLEASE

My half yearly is nearly coming but i hav no idea where i could find the past questions:read::sleep:

A non-metal element Z, forms a compound with the formula (NH4)2Z Which one of the following would be a correct formula? (A) NaZ (B) Cu(II)Z (C) MgZ2 (D) HZ Could any1 know right answer for this 1?:spin:

Suggest why marine organisms living in polar regions have a very high proportion of cholestrol in their membranes?:fish: