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Deffense [45]
2 years ago
11

What is the mass in grams of 0.40 moles of sodium borohydride

Chemistry
2 answers:
Vaselesa [24]2 years ago
6 0

Answer:

The mass of 0.40 moles NaBH4 is 15.14 grams

Explanation:

Step 1: Data given

sodium borohydride = NaBH4

Number of moles sodium borohydride = 0.40 moles

Atomic mass of Na = 22.99 g/mol

Atomic mass of B = 10.81 g/mol

Atomic mass of H = 1.01 g/mol

Step 2: Calculate the molar mass of NaBH4

Molar mass = 22.99 g/mol + 10.81 g/mol + 4*1.01 g/mol

Molar mass NaBH4 = 37.84 g/mol

Step 3: Calculate mass of NaBH4

Mass NaBH4 = moles NaBH4 * molar mass NaBH4

Mass NaBH4 = 0.40 moles NaBH4 * 37.84 g/mol

Mass NaBH4 = 15.136 grams  ≈ 15.14 grams of NaBH4

The mass of 0.40 moles NaBH4 is 15.14 grams

Mumz [18]2 years ago
3 0

Answer: The mass in grams of 0.40 moles of sodium borohydride is 15.12g

Explanation: Please see the attachment below

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V_l=(\pi*D^{2} /4)*L=(3.1416*\frac{8^{2}  \, in^{2} }{4} )*9ft*(\frac{12 in}{1ft})= 21714 in^{3}=12.57 ft^{3}

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