How much CO2 ir released (in pounds) per year of your normal driving? comment on the size of your answer. CO2 is a greenhouse gas) how cound you reduce "carbon footprint'.
- Assume gasoline is mostly octane
- how many miles do you drive per week or per month
- how many miles per year?
- Gas mileage of your car> (# miles per gallon of gas)
- stoichiometry of the reaction
In: Chemistry
can somebdy clearly explain me carbon dating?
In: Chemistry
Balance the half-reactions assuming that they occur in acidic solution.
H2O2(aq)?H2O(l)
Zn(s)?Zn^2+(aq)
Ti^3+(aq)?TiO2(s)
Mn(s)?Mn^2+(aq)
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For the following reaction, the concentration of A and the amount of time required to decrease that concentration to one-half of the initial concentration, t1/2, are directly proportional. Therefore, a decrease in concentration of A shows a proportional decrease in the half life, t1/2. What is the order of this reaction? If the rate constant for this reaction is 0.0355 M·s–1 at 400 °C, what is the half-life of this reaction, given an initial concentration of 0.569 M.
In: Chemistry
If you know that a sample of KI in water has a freezing point of -3.2C, what is the mass % of KI? What is the mole fraction of KI?
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Define the terms accuracy and precision. Give examples which illustrate the difference between terms.
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Please show all work.
3. The dissociation of the HO-H bond in water requires 493 kJ/mol.
a) How much energy, in joules, is required to break the HO-H bond in a single water molecule?
b) What wavelength of electromagnetic radiation would have the energy required to break a HO-H bond?
c) In what region of the spectrum (X-ray, UV, Vis, IR, etc.) does this radiation appear?
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How many molecules of NH3 are produced from 8.50x10^-4 g of H2
In: Chemistry
In: Chemistry
Part1: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g) ΔH∘rxn=−2044kJ
A)ΔSsys>0
or
B) ΔSsys<0
Part 2:
A)ΔSsurr>0
or
B)ΔSsurr<0
Part 3)
| A)The reaction is spontaneous at all temperatures. |
| B)The reaction is spontaneous at high temperatures. |
| C)The reaction is spontaneous at low temperatures. |
| D)The reaction is nonspontaneous at all temperatures. |
Part 4) N2(g)+O2(g)→2NO(g) ΔH∘rxn=+182.6kJ
A)ΔSsys>0
or
B) ΔSsys<0
Part 5)
A)ΔSsurr>0
or
B)ΔSsurr<0
Part 6)
| A)The reaction is spontaneous at all temperatures. | ||||||||
| B)The reaction is spontaneous at high temperatures. | ||||||||
| C)The reaction is spontaneous at low temperatures. | ||||||||
|
D)The reaction is nonspontaneous at all temperatures. A)ΔSsys>0 or B) ΔSsys<0 Part 8) A)ΔSsurr>0 or B)ΔSsurr<0 Part 9)
|
In: Chemistry
Show the balanced oxidation and reduction half – reactions UNDERLINE THE REDUCING AGENT and BOX THE OXIDIZING AGENT in the final balanced equation:
NiO2 (s) + Ag (s) ------> Ni2+ (aq) + Ag+ (aq) (Acidic Solution)
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One of the treatments for breast cancer is the administration of selective aromatase inhibitors. Aromatase is an enzyme involved in the synthesis of various estrogens, such as estrone and estradiol. Aromatase inhibitors can be divided into two categories, type I and type II. Type I inhibitors are irreversible inhibitors of aromatase. Type II inhibitors are competitive inhibitors of aromatase. Given what you know about enzyme inhibition, explain the differences between irreversible and competitive enzyme inhibition.
In: Chemistry
Synthesis of crystalline materials is greatly facilitated if the reaction mixture is homogeneous on an atomic scale. Describe some (at least three) of the routes that could be used to synthesise a sample of BaTiO3 powder and compare the advantages/disadvantages of each. Describe the strategies that can be adopted to synthesise thin films of semiconductor materials such as CdS or GaAs.
In: Chemistry
What are self-assembled monolayers and how are they characterized?
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What are self-assembled monolayers and how are they characterized?
In: Chemistry