Problema Solution
How many metric tons of chromium must be added to 2.50 metric tons of stainless steel to raise the percent of chromium for 11% to 18%.
Answer provided by our tutors
let
x = the metric tones of chromium that needs to be added
x has 100% chromium
11% if 2.50 metric tones of stainless steel + 100% of x of chromium = 18% of the total mass of (2.50 + x) metric tones
0.11*2.50 + 1*x = 0.18*(2.50 + x)
by solving the equation we find
x = 35/164
x = 0.2134 metric tones
0.2134 metric tones of chromium should be added.