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Thank you heaps xxx

homework... strugle.. can anyone teach me how to do these any help is great..
(8.756x10-2)(2.318x10-3)
------------------------------- =
(5.057x10-4)(0.85)
...

Thank you

Thank you xxxxxxxxxxxx

How is distiled water produced?
Xx

To separate sand from sand and copper sulfate mixture that has been shaken up?

Which of the following substances would be best to obtain pure water from a solution of sodium chloride.. chromotography? filtration? decantation? distilation?evaporation?

convert
0.0027kg to g =
25.75cm3 to L =
1648 mg to g =
675 mm to m =
0.0375 s to ms =
plzzzzzz

How do I separate sodium chloride crystals, iron filings and sand and obtain them as a solid

When the pure substance calcite is heated strongly it forms to carbon dioxide and lime.. is calcite an element or compound and why??