Question

de la ex 3 până la ultimul pls ​

Answer 1

3

dioxid de carbon = gaz

nisip = solid

oxigen = gaz

mercur = lichid

alcool = lichid  

calcar = solid

4-b

5-c

II.

1.

100% ................................ 60 Kg corp

7% ..................................... m = 4,2 kg sanga

4,2 kg ............................... 100% sange

x kg .................................... 55% plasma

= 2,31 kg plasma

100% plasma .................................. 2,31 kg plasma

90% apa ........................................... y = 2,08 kg apa

2.

100% alama ............ 40% cupru ........restul (60%) zinc

24g alama ................ xg cupru ........... .y g zinc

                               =9,6 g               = 14,4 g