Question: please answer all and show work - How much weight is needed to prepare a 500mL solution of 5 (g/L) of substance A ? -

please answer all and show work

- How much weight is needed to prepare a 500mL solution of 5 (g/L) of substance A ? - 10g of substance B has been dissolved in 200ml of water. Calculate the concentration of B in the following terms: g/L, mg/L,g/l, and ng/L. - How many grams are required to prepare a 500mL solution of substance B to achieve 10% W/V concentration? - Calculate the number of grams of NaCl(mw=58.5) in 50ml of 0.25MNaCl. - Prepare 100ml of a 0.1M solution from 300mMKCl solution

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