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alexandr1967 [171]
3 years ago
7

What is the nuclear binding energy for uranium-238 in joules? Assume the following:. Mass defect = 3.2008 x 10-27 kilograms. Use

E = mc2, with c = (3 x 108 m/s)2 Select one of the options below as your answer:A. 0.28807 x 10-12 joules B. 2.8807 x 10-12 joules C. 2.8807 x 10-10 joules D. 2.8807 x 10-8 joules E. 3.2008 x 1027 joules
Chemistry
2 answers:
Arte-miy333 [17]3 years ago
4 0

The correct answer is (C) 2.8807 x 10^-10


The explanation:


According to this formula:


E = MC^2


when E is the nuclear binding energy


and M is the mass defect = 3.2008 x 10^-27 Kg


and C is the speed of light = 3 x 10^8 m/s^2


so, by substitution:


∴ E = 3.2008 x 10^-27 * (3 x 10^8 )^2


= 2.8807 x 10^-10

Amiraneli [1.4K]3 years ago
4 0

We are given with a mass defect and asked to compute the nuclear binding energy for the element- uranium 238. The formula to be used is E = m c^2 where m is the mass defect, c is the speed of light. Substituting these data, the nuclear binding energy, E is equal to C. 2.8807x10^-10 joules. 
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How many grams of C6H6O3 will react with 97.0grams of O2?<br><br> C6H6O3+3O2 ===&gt; 6CO+3H2O
likoan [24]

Answer:

127.3 g

Explanation:

Data Given

mass of O₂= 97 g

mass of C₆H₆O₃ = ?

Reaction Given:

                C₆H₆O₃ + 3O₂ -------->  6CO + 3H₂O

Solution:

First find the mass of C₆H₆O₃ from the reaction that it combine with how many grams of oxygen (O₂).

Look at the balanced reaction

                  C₆H₆O₃  +   3O₂       -------->  6CO + 3H₂O

                    1 mol        3 mol

So 1 mole of C₆H₆O₃ combine with 3 moles of O₂  

Now

convert the moles into mass for which we have to know molar mass of C₆H₆O₃ and O₂

Molar mass of C₆H₆O₃

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Molar mass of C₆H₆O₃ = 126 g/mol

mass of C₆H₆O₃

                 mass in grams = no. of moles x molar mass

                 mass of C₆H₆O₃ = 1 mol x 126 g/mol

                 mass of C₆H₆O₃ = 126 g

Molar mass of O₂ = 2(16)

Molar mass of O₂= 32 g/mol

mass of O₂

                mass in grams = no. of moles x molar mass

                mass of O₂ = 3 mol x 32 g/mol

                 mass of O₂ = 96 g

So,

96 g of O₂ combine with 126 g of C₆H₆O₃ then how many grams of C₆H₆O₃ will combine with 97.0grams of O2

Apply unity Formula

                      96 g of O₂ ≅ 126 g of C₆H₆O₃

                      97 g of O₂ ≅  X g of C₆H₆O₃

By cross multiplication

                    X g of O₂ = 126 g x 97 g / 96 g

                   X g  of O₂ = 127.3 g

127.3 g of C₆H₆O₃ will combine with 97 g of O₂

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