1. Niger has twice as many births as deaths per 1,000 people, but the life expectancy is only 52.6, resulting in a young median age. Is TRUE
<u>Explanation:</u>
According to the world bank collections Niger has twice as many births as deaths per 1000 people, but the life expectancy is only 54.6 resulting in a young median age.
Birth rate was recorded as 48.14% It includes number of live births occurring during the year per 1000 population. Italy and Niger have backward masses economics: Italy has a developing people with a high future, and Niger has very young people with heel expectation.
Answer:
27 cubic feet
Explanation:
Since it is a cube, all side lengths are the same. So I'm this cafe, all side lengths are 3 ft. So you multiply the depth(3) by the width(3) by the height(3):
3*3*3=27.
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Answer: composition in weight percent = 41.25% Cu and 58.75% Zn
Composition in Atom percent = 40.54% Cu and 59.46% Zn
Explanation:
Starting with the composition in weight percent.
Let Mcu= mass of cu and Mzn= mass of zn
%W= weight percent
%Wcu = (Mcu/(Mcu + Mzn)) × 100%
By substituting the values
%Wcu = (33/(33+47)) × 100%
%Wcu = (33/80) × 100%
%Wcu = 41.25%
%Wzn = (Mzn/(Mcu + Mzn)) × 100%
= 47/80 × 100%
%Wzn = 58.75%
Then we can proceed to composition in atom percent
Atomic mass of Cu= Ac = 63.5g/mol
For zn = Az = 65.4g/mol
Atom percent cu = {(%Wcu×Ac)/[(%Wcu×Ac)+(%Wzn×Az)]} × 100%
Substituting the values
= {2619.375/6461.625}×100%
=40.54% Cu
Atom percent zn = {(%Wzn×Az)/[(%Wcu×Ac)+(%Wzn×Az)]} × 100%
={3842.25/6461.625}×100%
=59.46% Zn
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