Astudent takes a measured volume of 3.00 mhcl to prepare a 50.0 ml sample of 1.80 m hcl. what volume of 3.00 m hcl did the student use to make the sample?
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Ответ:
Moles in 3M solution: 3x
C = n/V
1,8 = 3x/0,05dm³
0,09 = 3x
x = 0,03dm³
A student need 0,03dm³ 3M HCl and 0,02dm³ of water.
Ответ:
301.7g
Explanation:
So there's 1 out of 3 are Oxygen.
905 / 3 = 301.7