(c) the color turns deep dark and then at certain level, it turns back to light green.
(d)fastest.
Answer:
true
Explanation:
drought is a period of unusually persistent dry weather that persists long enough to cause serious problems such as crop damage and/or water supply shortages. The severity of the drought depends upon the degree of moisture deficiency, the duration, and the size of the affected area.
The molarity of NaBr = 0.05036M
<h3>
calculation</h3><h3>Step1: calculate the total mass</h3>
0.0460 m NaBr has 0.0460 moles NaBr with 1000g of solvent
therefore the mass of NaBr= 0.0460 moles x 102.89 g/mol =4.73grams
total mass is therefore= 4.733 g +1000= 1004.73 grams
step 2:
use the density to determine the volume
vol=mass/density
=1004.73 g/1.10 g/mol=913.39 ml in liters= 913.39/1000=0.91339 L
now the molarity = moles/vol in liters
=0.0460 m/0.91339=0.05036 M
Answer:
- All alkalies are bases but all bases are not alkalies
- all alkalies are soluble in water but all bases are not alkalies .
hope it is helpful to you
To solve this, we can use two equations.
t1/2 = ln 2 / λ = 0.693 / λ - (1)
where, t1/2 is half-life and λ is the decay constant.
Nt = Nοe∧(-λt) - (2)
Nt = amount of atoms at t =t time
Nο = initial amount of atom
t = time taken
From (1),
10 yr = 0.693 / λ
λ = 0.693 / 10 yr
From (2)
Nt = 100 g eΛ(-(0.693 / 10 yr) x 20 yr)
Nt = 25.00 g.
Hence, remaining mass will be 25.00 g