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3 years ago

What is the mass of 2.30 ×1022 molecules of NaOH

1 answer:

4 0

Molar mass of NaOH = 39.997 g/mol

39.997 g ---------- 6.02x10²³ molecules
g --------------- 2.30x10²² molecules

mass = 2.30x 10²² * 39.997 / 6.02x10²³

mass = 9x199^24 / 6.02x10²³

mass = 15.280 g

hope this helps!

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Explanation:

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Mass of solution will be the sum of mass of water and mass of KCl.

Mass of Solution = mass of water + (no. of moles of KCl × molar mass)

= 200 g + $(0.25 mol \times 54.5 g/mol)$

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Q = $mC \Delta T$

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What is the maximum concentration of Ag⁺ that can be added to a 0.00750 M solution of Na₂CO₃ before a precipitate will form? (Ks

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Answer:

$\large \boxed{1.64\times 10^{-5}\text{ mol/L }}$

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