According to the EPA... If someone burns fossil fuels<span>, the reaction releases nitrogen oxides up and into the atmosphere. This </span>contributes<span> to the creation of smog (sometimes acid rain). The biggest sources of nitrogen oxide emissions are: vehicles, coal power plants, ships, airplanes, and large industrial operations.</span>
Answer:
Δ[NH₃]/Δt = 2/3 ( Δ[H₂]/Δt )
Explanation:
For determining rates as a function of reaction coefficients one should realize that these type problems are <u>always in pairs</u> of reaction components. For the reaction N₂ + 3H₂ => 2NH₃ one can compare ...
Δ[N₂]/Δt ∝ Δ[H₂]/Δt, or
Δ[N₂]/Δt ∝ Δ[NH₃]/Δt, or
Δ[H₂]/Δt ∝ Δ[NH₃]/Δt, but never 3 at a time.
So, set up the relationship of interest ( ammonia rate vs. hydrogen rate)... nitrogen rate is ignored.
Δ[H₂]/Δt ∝ Δ[NH₃]/Δt
Now, 'swap' coefficients of balanced equation and apply to terms given then set term multiples equal ...
N₂ + 3H₂ => 2NH₃ => 2(Δ[H₂]/Δt) = 3(Δ[NH₃]/Δt) => 2/3(Δ[H₂]/Δt) = (Δ[NH₃]/Δt)
NOTE => Comparing rates individually of the component rates in reaction process, the rate of H₂(g) consumption is 3/2 times <u>faster</u> than NH₃(g) production (larger coefficient). So, in order to compose an equivalent mathematical relationship between the two, one must reduce the rate of the H₂(g) by 2/3 in order to equal the rate of NH₃(g) production. Now, given the rate of one of the components as a given, substitute and solve for the unknown.
CAUTION => When Interpreting rate of reaction one should note that the rate expression for an individual reaction component defines 'instantaneous' rate or speed. <u>This means velocity (or, speed) does not have 'signage'</u>. Yes, one may say the rate is higher or lower as time changes but that change is an acceleration or deceleration for one instantaneous velocity to another. Acceleration and Deceleration do have signage but the positional instantaneous velocity (defined by a point in time) does not. Thus is reason for the 'e-choice' answer selection without the signage associated with the expression terms.
Molarity is defined as number of moles of solute dissolved per litre of solution.
M is the symbol used for it.
unit is= mol/ Litre Given:
Moles of solute KCl is 5
volume of solution is 2L
Calculation:
Molarity= Moles of Solute/ volume M= 5/2= 2.5 mol/L
The rest of<span> the month it can be anywhere from 0 to180 degrees away and, at least in theory, visible in the daytime sky. At full </span>moon<span>, the </span>moon<span> is exactly opposite the sun. This means that the </span>moon<span> rises just as the sun is setting, and sets just as the sun is rising.</span>
Answer: An unhealthy diet can increase the risk of some cancers. Overweight and obesity are associated with at least 13 types of cancer, including endometrial (uterine) cancer, breast cancer in postmenopausal women, and colorectal cancer. These cancers make up 40% of all cancers diagnosed.
