Answer:
3,938.22
Explanation:
(correct me if I'm wrong)
On the surface of the earth, weight is calculated by multiplying mass and gravity. Because we know the radius of the Earth, we can use the Law of Universal Gravitation to calculate the mass of the Earth in terms of the gravitational force on an object (its weight) at the Earth's surface, using the radius of the Earth as the distance.
I think this is the question you were trying to ask if not, ill try it again
Answer:
The rate is 
Explanation:
Stoichiometry
Kinetics
![-r_{A}=k \times [CH_{3}Cl] \times [NaOH]](https://tex.z-dn.net/?f=-r_%7BA%7D%3Dk%20%5Ctimes%20%5BCH_%7B3%7DCl%5D%20%5Ctimes%20%5BNaOH%5D%20)
The rate constant K can be calculated by replacing with the initial data
![1 \times 10^{-4}\frac{mole}{Ls}=k \times [0,2M] \times [1,0M] =5 \times 10^{-4}\frac{L}{mole s}](https://tex.z-dn.net/?f=%201%20%5Ctimes%2010%5E%7B-4%7D%5Cfrac%7Bmole%7D%7BLs%7D%3Dk%20%5Ctimes%20%5B0%2C2M%5D%20%5Ctimes%20%5B1%2C0M%5D%20%20%3D5%20%5Ctimes%2010%5E%7B-4%7D%5Cfrac%7BL%7D%7Bmole%20s%7D)
Taking as a base of calculus 1L, when half of the 
is consumed the mixture is composed by
(half is consumed)
(by stoicheometry)
Then, the rate is
The reaction rate decreases because there’s a smaller concentration of reactives.
Answer:
The yield is 20 %.
Explanation:
Mg + 2 HCl → MgCl2 + H2
(12 g Mg) / (24.30506 g Mg/mol) x (1 mol H2 / 1 mol Mg) x (2.015894 g H2/mol) = 0.9953 g H2.
(0.2 g) / (0.9953 g) = 0.20 = 20% yield
