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What is the molarity of 48.6 g of magnesium (Mg) ions in 4 L H2O? Show cancelation of units to get credit. PLEASE HELP!!!

Sagot :

drpelezo

Answer:

0.50M (1 sig. fig.)

Explanation:

The problem objective is 'Molarity (M)', so set up given data to reduce to moles per liter. That is ...

Molarity = moles Mg/Liters of solution = (48.6g/24.31g·mole⁻¹)/(4Liters) = 0.499794323M (calc. ans.) ≅ 0.5M (1 sig. fig.)

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