سؤال في الكيمياء ((كيف؟!))

[سحر البيان]

هل أنت من طالباتي ؟

بعدين انت ذاكرتي الباب اول و بعدين بتحلي البنك ؟

و لا بتحلي البنك على طول هذا السؤال سهل

[Wasan R. AL-Qurashi]

a solution is prepared by dissolving 516.5 mg of oxalic acid (C2H3O4) to make 100 ml of solution . a 159 ml portion is then diluted to 250 ml > what is the molarity of the final solution ??




what mass of Li3PO4 is needed to prepare 107ml of a solution having a lithium concentration of 0.175 M ?









thanks alote ....

[Wasan R. AL-Qurashi]

معليش بس للان م فهمت دي

a 0.580 g sample of compound containing only carbpn and hydrogen contains 0.480 g of carbon and 0.100 g of hydrogen .at stp , 33.6 ml of the gas has a mass of 0.087 g what is the molecular formula for the copound ?
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