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Questions (15)
A string is 16 METERS LONG. HOW MANY PIECES OF LENGTH 1-METER LONG CAN CUT FROM IT?
2 answers
521 views
What is the energy and frequency of a photon with a wavelength of 2.57 ×102 m?
1 answer
441 views
What is the energy in joules and wavelength in meters of microwave radiation with = 2.4 ×1011s-1?
1 answer
546 views
16. From the standard enthalpies of formation, calculate the Horxn for the reaction: (Hof = -151.9 kJ/mol for C6H12.)
C6H12
1 answer
761 views
18. Calculate ƒ´H for the following reaction using Hess law
H2 (g) + Br2 (g) ¡÷ 2 HBr (g) Experimental information 2 H+ ¡÷
2 answers
744 views
17. Calculate ƒ´H of strontium carbonate using Hess law
Sr + C (graphite) + 3/2 O2 ¡÷ SrCO3 Experimental information SrO ¡÷
1 answer
667 views
16. From the standard enthalpies of formation, calculate the ƒ´Horxn for the reaction: (ƒ´Hof = -151.9 kJ/mol for C6H12.)
C6H
1 answer
956 views
15. How much heat energy (in kJ) is evolved by a reaction in a bomb calorimeter in which the temperature of the bomb and water
1 answer
642 views
14. Calculate the amount of heat liberated (in kJ) from 350 g mercury when it cools from 77.0 oC to 12oC. (The specific heat of
1 answer
573 views
11. Calculate the total pressure of a mixture of 0.02 mol He and 0.01 mol H2 in a 5.0 L flask at 10 ºC.
1 answer
602 views
8. A chemist vaporized a liquid compound and determined its density. If the density of the vapor at 90 ºC and 753 mmHg is 1.585
1 answer
3,204 views
7. Calculate the density of hydrogen sulfide, H2S, at 56 ºC and 967 mmHg. (Express density in g/L)
1 answer
3,386 views
6. A 2.50 L flask was used to collect a 5.65 g sample of propane gas, C3H8. After the sample was collected, the gas pressure was
1 answer
777 views
seawater contains 0.0065% (by mass) of bromine. how many grams of bromine are ther in 1.oo l of seawater? the density of
1 answer
1,773 views
A 200 g ball is lifted upward on a string. It goes from rest to a speed of 2.0 m/s in a distance of 1.0 m. What is the tension
2 answers
848 views
Answers (7)
7. Calculate the density of hydrogen sulfide, H2S, at 56 ºC and 967 mmHg. (Express density in g/L)
0.25
should you do what you feel is best for jerry at the risk of alienating yourself from the staff?".
The work done = Force X displacement in the direction of the force. The sum of forces in the horizontal direction is mgSin(of the angle)- F = 0 The force acting, F = mgSin(of the angle). The Work done by this force = mgSin(of the angle) X 15 meters The
The answer is T = 1.96 + 0.4 = 2.39 N
i have the same truple :( i cant get what they really want !!!
