Cytosine is a building block of DNA,
(brainliest would be appreciated)
Answer:
k = -0.09165 years^(-1)
Explanation:
The exponential decay model of a radioactive isotope is generally given as;
A(t) = A_o(e^(kt))
Where;
A_o is quantity of isotope before decay, k is decay constant and A(t) is quantity after t years
We are given;
A_o = 5 kg
A(10) = 2kg
t = 10 years
Thus;
A(10) = 2 = 5(e^(10k))
Thus;
2 = 5(e^(10k))
2/5 = (e^(10k))
0.4 = (e^(10k))
In 0.4 = 10k
-0.9164 = 10k
k = -0.9164/10
k = -0.09165 years^(-1)
<span>HCl + MnO2 → MnCl2 + H2O + Cl2
In order to balance this, we have to have the same number of electrons of each element on both sides. Here's how to do it:
4HCl + MnO2 </span>→ MnCl2 + 2H2O + Cl2
You can see that now there are 4 atoms of H on the left, and 4 on the right (left: 4H, right 2H2 = 4H). The number of electrons for Mn is 1 on both sides, and for O is 2 on both sides. For Cl, on the left, there are 4 electrons, and on the right there are 4 as well (left: 4Cl, right: Cl2 + Cl2 = 4Cl).
So, based on this, the coefficient for HCl is D. 4.
Answer:
21 Moles of Carbon is reacted
Explanation:
According to Balanced Chemical Equation, 2 moles of Hydrogen reacts with 3 moles of Carbon. Hence, for 14 moles of Hydrogen,
= (3 C × 14 H₂) ÷ 2 H₂
= 21 Moles of C
