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1. The specific heat of mercury metal is 0.138J/gK. How much heat, in joules, is required to heat a 127 gram sample of mercury from -18.5oC to 107.2oC? Enter your answer in scientific notation with no units.
2. What is the specific heat of a substance (in J/g.K) if a 52.2 gram sample of the substance increases in temperature by 17.8 when it is heated by 230.0 joules?
3. 3C(s) + 4H2(g) + 5O2(g) —> 3CO2(g) + 4H2O(l) ΔH= -2323.7 kJ/mol
How much heat would be released when 34.1 g of O2 react?
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What is the force exerted by the floor on the chair? Physics homework help Science Assignment Help
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A chair of weight 140 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 38.0 N directed at an angle of 34.0 ∘ below the horizontal and the chair slides along the floor.
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Why is water split during photosynthesis? Biology homework help Science Assignment Help
To replace the electron lost in photosystem II
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Chemistry Reaction Stoichem Problem, chemistry homework help Science Assignment Help
Consider the reaction of peroxydisulfate ion (S2O82-) with iodide ion (I –) in aqueous solution.
At a particular temperature, the rate of disappearance of S2O82- varies with reactant concentrations in the following manner.
| Experiment | [S2O82- ] (M) | [I – ] (M) | (M/s) |
|---|---|---|---|
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| 1 | 0.018 | 0.036 | 2.6 10-6 |
| 2 | 0.027 | 0.036 | 3.9 10-6 |
| 3 | 0.036 | 0.054 | 7.8 10-6 |
| 4 | 0.050 | 0.072 | 1.4 10-5 |
What is the rate of disappearance of I – when [S2O82- ] = 0.018 M and [I – ] = 0.038 M?
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please help within five minutes Science Assignment Help
1. The specific heat of mercury metal is 0.138J/gK. How much heat, in joules, is required to heat a 127 gram sample of mercury from -18.5oC to 107.2oC? Enter your answer in scientific notation with no units.
2. What is the specific heat of a substance (in J/g.K) if a 52.2 gram sample of the substance increases in temperature by 17.8 when it is heated by 230.0 joules?
3. 3C(s) + 4H2(g) + 5O2(g) —> 3CO2(g) + 4H2O(l) ΔH= -2323.7 kJ/mol
How much heat would be released when 34.1 g of O2 react?
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heat energy is required to raise the temperature of 0.365, chemistry homework help Science Assignment Help
How much heat energy is required to raise the temperature of 0.365
kg of copper from 23.0 ∘C to 60.0 ∘C? The specific heat of copper is 0.0920 cal/(g⋅∘C) .
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Write the equation of the line with the given slope and y-intercept. Mathematics Assignment Help
slope = 5
y-intercept = 8
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In six to eight sentences, explain the dominant message of this passage and the methods the author u Humanities Assignment Help
“I had committed myself to doing it when I sent for the rifle. A sahib has got to act like a sahib; he has got to appear resolute, to know his own mind and do definite things. To come all that way, rifle in hand, with two thousand people marching at my heels, and then to trail feebly away, having done nothing–no, that was impossible. The crowd would laugh at me. And my whole life, every white man’s life in the East, was one long struggle not to be laughed at.”
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If you were to choose a career in corrections, which position would you pursue? Assignment help Writing Assignment Help
Remember that a career in corrections does not have to mean a role in a correctional facility.
Each thread must be at least 150 Words with a minimum of 2 Citations
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∘C, if the mass of the body is 97 kg and its heat capacity is 4.0, chemistry homework help Science Assignment Help
Estimate the mass of water that must evaporate from the skin to cool a body by 0.90
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