Chemistry, asked by HEYFOLK, 8 months ago

For the reaction:
2 C2H6 (g) + 7 O2 (g) → 4 CO2 (g) + 6 H2O (g) ΔH = - 2044 k2
What can be said about the amount of energy required to break the bonds in the reactants, vs. the amount of energy released when new bonds form in the products?
a.
The amount of energy released when new bonds form in the products is equal to the amount of energy required to break bonds in the reactants.
b.
The amount of energy released when new bonds form in the products is less than the amount of energy required to break bonds in the reactants.
c.
The amount of energy released when new bonds form in the products is greater than the amount of energy required to break bonds in the reactants.
d.
No energy is required to break the bonds in the reactants

Answers

Answered by SUBRATA4322

Answer:

How do you find the number of integral solutions of the equation 2x + 3y = 763?

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8 Answers

Manish Dodrajka, Digital Marketeer

Answered Apr 25, 2014

2x + 3y = 763

=> y = (763 - 2x)/3

It has infinite integral solutions as there are infinite integral values of 'x' for which 'y' is an integer.

But the equation has finite number of positive integral solutions and I have solved for it.

Now, for 'y' to be an integer, (763-2x) must be a multiple of 3.

A little observation tells us that it happens when

763-2x=759,753,747,741,735,729......15,9 and 3.

=> x=2,5,8,11,14,17.........371,374,377,380

For each value of 'x', y can be calculated.

The values of 'x' forms an A.P.

so,

380 = 2 + (n-1)3

=>n=127.

Hence, there are 127 solutions to the ...