7 Answered Questions for the topic Chemistry Homework

Chemistry Homework

04/12/20

Phase change equations
how do I Calculate the amount of energy needed to change 207 g of ice at -10 degree C to steam at 125 degrees C
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Chemistry Homework Chemistry College Chemistry

11/25/14

How do I do this? Chemistry HW
The atmospheric pressure on the surface of Venus is about 100 atm. This pressure is equal to____torr?
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Chemistry Homework Chemistry Chemical Changes

11/24/14

Homework Help (Chemistry)
A) A sample of SO2 contains 1.98*10-3 moles. How many mL will it occupy? The density of the gas is 2.168g/L. B)If the density of SO2, were to increase because the temperature decreased, would the... more
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Chemistry Homework

11/24/14

Chemistry (Please explain)
2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g) 1.) What minimum volume of 3.5M H2SO4 is required to produce 18L of H2 at STP?   Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) 2.) What minimum amount of 1.35M HCl is... more
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Chemistry Homework

11/24/14

Chemistry (Please explain)
1.) How much of a 1.80M sodium sulfate solution in milliliters is required to completely precipitate all of the barium in 190.0mL of a 0.300M barium nitrate... more
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Chemistry Homework Chemistry College Chemistry

11/24/14

Chemistry, How do I figure this out?
When you add 0.205 g of sodium metal to an excess of hydrochloric acid, you find that 2130 J of heat are produced. What is the enthalpy of the reaction as written below?                          ... more
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Chemistry Homework Chemistry College Chemistry

11/24/14

Chemistry Question, Need some help to figure this one out
Use the bond energies provided to estimate ΔH°rxn (in kJ) for the reaction below.XeF2 + 2 F2 → XeF6Bond Bond energy (kJ/mol)Xe-F 147F-F 159Answer: kJ ?
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