Answer:
A. 12 grams Zn
B. 280 g of copper.
Step-by-step explanation:
100 grams of brass
20 grams of zinc
100 grams of brass has 20 grams of Zn.
20/100 = 0.200 Zn <u>20% Zn and 80% copper</u>.
A. (60 g brass)*(0.2) = 12 grams Zn
B. (350 g brass)*(0.80) = 280 g of copper.
120 seconds is 2 * 60s
60s is 1 minute, so 2*60s = 2 minutes
the answer is B...i swear its B
D=426-48(21)
I got 18 days.
So, D=18
Hope this helps! :)