Answer:
La fuerza resultante o de reacción por parte de la pared es igual a cero
Explanation:
Aunque se aplique una fuerza de 13 kgf sobre la pared ,esta fuerza no es lo suficiente para que se mueva por lo tanto la pared o el objeto al que se le aplica la fuerza está en equilibrio estático.
El que el objeto o la pared esté en equilibrio estático quiere decir que la resultante de las fuerzas que actúan sobre el objeto es cero.
The answer is 0.62g.
Solution:
From year 1960 to year 2030, it has been
2030-1960 = 70 years
The half-life of the radioactive element is 28 years, then the sample will go through
70 years * (1 half-life/28 years) = 2.5 half-lives
Starting with a 3.5 gram sample, we will have
3.5*(1/2) after one half-life passes
3.5*(1/2) * (1/2) = 3.5*(1/4) after two half-lives pass
3.5*(1/4) * (1/2) = 3.5*(1/8) after three half-lives pass and so on
Therefore, we can write the remaining amount of the sample after the number n of half-lives have passed as
mass of sample = initial mass of sample/2^n
The mass of the remaining sample for n = 2.5half-lives can be now calculated as
mass of sample = 3.5 grams / 2^2.5 = 0.62 g
Answer: The empirical formula is 
.
Explanation:
So, the mass of each element is given:
Mass of Se = 1.443 g
Mass of O = 0.5848 g
Step 1 : convert given masses into moles.
Moles of Se=
Moles of O = 
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For Se = 
For O =
The ratio of Se: O = 1: 2
Hence the empirical formula is .
<span>A polymer forms because the hydrocarbon joins with itself in a polymerization reaction.
I really hope this helps! :D</span>
