Answer:
B. The amount of vegetation decreases.
Explanation:
plants can't grow without rain
Answer:
C7H6O2+C8H17OH=C15H22O2+H2O
Explanation:
by reacting alcohol and acid we get ester and water
W=0.360
p=1.18g/mL
pH=2.12
v=14.0 L
M(HCl)=36.46 g/mol
v₀-?
1) pH=-lg[H⁺]
[H⁺]=c(HCl)=10^(-pH)
n(HCl)=v[H⁺]=v*10^(-pH)
2) n(HCl)=m(HCl)/M(HCl)=wv₀p/M(HCl)
3) v*10^(-pH)=wv₀p/M(HCl)
v₀=v*10^(-pH)M(HCl)/(wp)
v₀=14.0*10^(2.12)*36.46/(0.360*1.18)=9.115 mL
Approximately 9.1 mL of concentrated solution required.
Using electronegative. If the difference is between 0 and .4, the bond is nonpolar,If the difference is between .4 and about 1.9, the bond is polar, and if the difference is over 1.9 it is typically ionic.
<h3>
Answer:</h3>
0.248 g
<h3>
Explanation:</h3>
<u>We are given;</u>
- Time as 40 minutes
- Original amount of N-13
We are required to calculate the amount left after decay.
- We need to know the half life of N-13 first;
- Half life of N-13 is 9 minutes 58 seconds (9.965 minutes0
We are going to use the formula;
- Remaining amount = Original amount × 0.5^n
That is; N = N₀ × 0.5^n , where n is the number of half lives.
n = 40 minutes ÷ 9.965 minutes
= 4.014
Therefore;
N = 4 g × 0.5^4.014
= 0.248 g
Therefore, the mass of Nitrogen-13 that will be left is 0.248 g
