Question

plz answer all my questions correctly I will mark you as BRAINLIEST.....!!!
hrudhika plz answer all these correctly before 3pm

and Q3 also which I alredy posted....!!!

plzzzzz....!!​

Answer 1

Answer: percentage of CU = mass of CU/ mass of brass

= (63.5/ 321.42)×100

=.197×100

=19.7

brass ~ HNO3

321.4g ~ 63 g

5 g~ x

x=63×5/321.4

= 1g

1g HNO3 is needed

321.4 g brass ~ 80 g NH4NO3

5 g brass ~ x

x= 80×5/321.42

=1.24 g

1.24 g NH4NO3 is formed

Answer 2

Answer:

this was yester days assignment why did you ask it now

Explanation: