Answer:
B, the internet serves to provide people with more insightful explanations on things that they have not experienced yet but want to find out more on.
The heat absorbed is calculated using the following equation:
Q = mCΔT
Q = heat absorbed
m = mass = 66 g
C = specific heat of iron = 0.449 J/g.°C
ΔT = temperature change = 20 - 7 =13°C
Therefore,
Q = 66*0.449*13 = 385.242 J
Answer:
Angle of incline is 20.2978°
Explanation:
Given that;
Gravitational acceleration on a planet a = 3.4 m/s²
Gravitational acceleration on Earth g = 9.8 m/s²
Angle of incline = ∅
Mass of the stone = m
Force on the stone along the incline will be;
F = mgSin∅
F = ma
The stone has the same acceleration as that of the gravitational acceleration on the planet.
so
ma = mgSin∅
a = gSin∅
Sin∅ = a / g
we substitute
Sin∅ = (3.4 m/s²) / (9.8 m/s²)
Sin∅ = 0.3469
∅ = Sin⁻¹( 0.3469 )
∅ = 20.2978°
Therefore, Angle of incline is 20.2978°
Answer:
There are several reasons that experiments with faulty designs or with inconsistent data are problematic for scientists. A person can make one of those problems if he or she were to poorly measure what they are studying. For example, someone measured the mass of a book correctly to be 2 pounds, and someone else measured it mistakenly to be 1 pound. Another way that a person can make problems with faulty designs and inconsistent data is the lack of accuracy and precision. This could happen when someone can have the value of 10 from a correct data set of 9, 10, 10, 11, and 12, and someone else can have the value of 10 from an incorrect data set of 5, 7, 19, 15, and 10. The first data set has a lot more precision that the second data set. Another example would be: Someone could have the value of 10 from a correct data set of 9, and 11. Someone else can have the value of 10, but have the incorrect data of 7, and 15. The first set has more accuracy than the second set. A third reason that faulty designed experiments and inconsistent data can happen is the flawed experiments. For flawed experiments to happen, they may be uncontrolled, untrustworthy conclusions, or being inconsistent with other tests performed. For the last reason that they can happen, there can be bias. this could happen when the samples are too small, not randomly selected samples, and some outliers are present.
Answer : The rate law for the overall reaction is, ![R=\frac{K[A]^2[D]}{[C]}](https://tex.z-dn.net/?f=R%3D%5Cfrac%7BK%5BA%5D%5E2%5BD%5D%7D%7B%5BC%5D%7D)
Explanation :
As we are given the mechanism for the reaction :
Step 1 : 
(equilibrium)
Step 2 : 
(slow)
Overall reaction : 
First we have to determine the equilibrium constant from step 1.
The expression for equilibrium constant will be,
![K'=\frac{[B][C]}{[A]^2}](https://tex.z-dn.net/?f=K%27%3D%5Cfrac%7B%5BB%5D%5BC%5D%7D%7B%5BA%5D%5E2%7D)
Form this, the value of [B] is,
![[B]=\frac{K'[A]^2}{[C]}](https://tex.z-dn.net/?f=%5BB%5D%3D%5Cfrac%7BK%27%5BA%5D%5E2%7D%7B%5BC%5D%7D)
............(1)
Now we have to determine the rate law from the slow step 2.
The expression for law will be,
![Rate=K''[B][D]](https://tex.z-dn.net/?f=Rate%3DK%27%27%5BB%5D%5BD%5D)
.............(2)
Now put equation 1 in 2, we get:
![Rate=K''\frac{K'[A]^2}{[C]}[D]](https://tex.z-dn.net/?f=Rate%3DK%27%27%5Cfrac%7BK%27%5BA%5D%5E2%7D%7B%5BC%5D%7D%5BD%5D)
![Rate=\frac{K[A]^2[D]}{[C]}](https://tex.z-dn.net/?f=Rate%3D%5Cfrac%7BK%5BA%5D%5E2%5BD%5D%7D%7B%5BC%5D%7D)
Therefore, the rate law for the overall reaction is,
