03/31/19

Calculate ∆H for the reaction (n)
Calculate ∆H for the reaction2 NOCl(g) → N2(g) + O2(g) + Cl2(g)given the following data: Equation ∆H ½ N2(g) + ½ O2(g) → NO(g) 90.3 kJ NO(g) + ½ Cl2(g) → NOCl(g) -38.6 kJ ∆H= kJ
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03/29/19

Calculus 1 Critical Point and Local Extrema
I'm not even sure where to start, here is the question.If a is a positive constant, find all critical points of f(x)=x^3−ax.b) find the value of a so that f has a local extrema at x=+-2
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03/29/19

The diameter of a circle has endpoints A(9,-7) and B(-2,5). Find the length of the radius. Please I need some help and thanks.
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03/29/19

What will be the pH of a buffer solution prepared from 0.20 mol NH3, 0.40 mol NH4NO3, and just enough water to give 1.00 L of solution
What will be the pH of a buffer solution prepared from 0.20 mol NH3, 0.40 mol NH4NO3, and just enough water to give 1.00 L of solution
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03/29/19

determine ka for hydrogen sulfate ion hso4 − in a 0.10 m solution the acid is 29% ionized
determine ka for hydrogen sulfate ion hso4 − in a 0.10 m solution the acid is 29% ionized
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03/28/19

There are a total of 800 students in a high school. Twice the number of upperclassmen is 98 less than the number of underclassmen. How many upper and under classmen are in the high school?
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03/26/19

What is the smallest possible product you can form from two non-negative numbers whose sum is 82? The minimum product is
What is the smallest possible product you can form from two non-negative numbers whose sum is 82? The minimum product is?
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03/12/19

How much salt (NaCl) is in the average adult human body?
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01/06/19

Find the equation of a line with the given slope and passing through the given point,P. M=1, P(3,5)l
Please show how you got this answer
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01/04/19

Suppose that 15 inches of wire costs 45 cents. At the same rate, how many inches of wire can be brought for 24 cents?
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12/27/18

Santa carrot kit
Santa has a carrot kit. He gives Rudolph halftime carrots plus1/2 carrot, he gives Donner half remaining carrots plus 1/2 he gives Blitzen half remaining carrots plus 1/2 and Leaving Santa one... more
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12/27/18

Percent of moles and grams
How would i go about solving the following question?When 10.0 g of NH3reacts, the actual yield of N2is 8.50 g. What is the percent yield?4NH3(g) + 6NO(g) →5N2(g) + 6H2O(l
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12/27/18

Converting moles to grams

How many grams of N2are produced from 100. g of NH3 in the following reaction?4NH3(g)+ 6NO(g) →5N2(g) + 6H2O(l)
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12/27/18

Figuring out Mole equations

How many grams of hydrogen are needed to produce 1.80 g of water according to this equation? 2H2+ O2→2H2O
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12/27/18

Intro to Chemistry

How many calories are required to raise the temperature of a 35.0 g sample of iron from 25 °C to 35 °C? Iron has a specific heat of 0.108 cal/g °C
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12/27/18

Introduction to Chemistry
A researcher added three samples of sodium chloride solution; the volumes were: 0.351 mL, 0.350 mL and 0.349 mL. The total volume should be reported as
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12/27/18

Chemistry and Radiation

When aluminum 27 is bombarded with a neutron, a gamma rays is emitted. What radioactive isotope is produced?
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12/27/18

Find the slope of the tangent to the curve of intersection of the surface 2z = sqrt(9x^2 + 9y^2 − 36) and the plane y = 1 at the point (2; 1; 3/2).
Find the slope of the tangent to the curve of intersection of the surface 2z = sqrt(9x^2 + 9y^2 − 36) and the plane y = 1 at the point (2; 1; 3/2).Please help.
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12/25/18

How do I calculate the tension in cord of a crane uplifting a burden (100Kg) at 8m/s^2?
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12/20/18

if dp/dx=11-2x and bep is known to be a production of 3000 what is the p as function of x
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08/20/17

A pool 100 yards by 150 yards with an area of 15,000 square yards, fenced with 25 yards by 50 yards with an area of 1,250 square yards.What is the perimeter?
The local community decides to install a pool beside the park.  The pool area will be a rectangular region of 100 yards by 150 yards with an area of 15,000 square yards.  The pool itself will take... more
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08/20/17

the length of a rectangular field is 8cm longer than the width, if the perimeter of the field is 96cm what is the actual length and breadth of the field
the length of a rectangular field is 8cm longer than the width, if the perimeter of the field is 96cm what is the actual length and breadth of the field
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08/20/17

Cully Furniture buys two products for resale: big shelves (B) and medium shelves (M). Each big shelf costs $500 and requires 100 cubic feet of storage space, an
Cully Furniture buys two products for resale: big shelves (B) and medium shelves (M). Each big shelf costs $500 and requires 100 cubic feet of storage space, and each medium shelf costs $300 and... more
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08/20/17

What is 6^2÷2 (3)+4, and why?
I say 58, others argue 10. However, since the 2 & 3 are not both in parenthesis, I believe you go in natural order, left to right,  and division would supercede multiplication.
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08/20/17

find the number of positive integer n, such that √n + √n+1 < 11
Based on number theory
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