Tuesday
May 21, 2013

# Posts by bill

Total # Posts: 638

chemistry
-4.1 KJ

chemistry
The enthalpy of neutralization for the reaction of a strong acid with a strong base is -56 kJ/mol of water produced. How much energy will be released when 185.0 mL of 0.400 M HCl is mixed with 152.5 mL of 0.500 M NaOH?

physics
If it requires 5.5 J of work to stretch a particular spring by 2.0 cm from its equilibrium length, how much more work will be required to stretch it an additional 4.1 cm?

algebra
Multiply , then simplify 5 sqrt:75 - 7 sqrt:3

algebra
solve (x+17)(x-6)(x+14)>0

math
In the bac of an old cupboard you discover a note signed by a pirate famous for his bizarre sense of humor and love of logical puzzles. In the note he wrote that he had hidden treasure somewhere on the property. He listed five true statements and challenged the reader to use t...

Chemistry
How much by mass of Urea (NH2)2CO is required for a 32.5% solution in one litre of water.

Math/Economics
Suppose that a firm has only one variable input, labor, and firm output is zero when labor is zero. When the firm hires 6 workers it produces 90 units of output. Fixed cost of production are \$6 and the variable cost per unit of labor is \$10. The marginal product of the seventh...

Math/Economics
Suppose that a firm has only one variable input, labor, and firm output is zero when labor is zero. When the firm hires 6 workers it produces 90 units of output. Fixed cost of production are \$6 and the variable cost per unit of labor is \$10. The marginal product of the seventh...

math
farmer fred had chickens and cows on his farm. he knows that together there are 108 legs and 30 heads. how many of each type of animal does he have?

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