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nata0808 [166]
2 years ago
10

What is the mass of 1.84 mol NaCl? Give your answer to the correct number of significant figures. (Molar mass of NaCl = 58.44 g/

mol)
Chemistry
2 answers:
eduard2 years ago
8 0

yes 108 is correct thank u

Roman55 [17]2 years ago
3 1
Mol =  \frac{mass}{molecular weight}
Rearranged to give grams = molecular weight  * mol
grams = 1.84 * 58.44 = 107.53 grams
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Magma hot spot.

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3 years ago
Using the formula weight of tris (fw = 121.1), how much (to the nearest 0.01 g) is needed to prepare 50 ml of a 0.50 m solution?
Katyanochek1 [597]

Answer:

              3.03 g

Solution:

Data Given:

                  Molarity  =  0.50 mol.L⁻¹

                  M.Mass  =  121.1 g.mol⁻¹

                  Volume  =  50 mL  =  0.05 L

Step 1: Calculate moles as,

                            Molarity  =  Moles ÷ Volume

Solving for Moles,

                            Moles  =  Molarity × Volume

Putting values,

                            Moles  =  0.50 mol.L⁻¹ × 0.05 L

                            Moles =  0.025 mol

Step 2: Calculate Mass of Tris as,

                            Moles  =  Mass ÷ M.Mass

Solving for Mass,

                            Mass  =  Moles × M.Mass

Putting values,

                            Mass  =  0.025 mol × 121.1 g.mol⁻¹

                            Mass =  3.03 g

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Hope I helped! ☺

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