Question

in h2O and h2o2 mass oxygen​

Answer 1

Answer:

H20 HAS 16 G OF OXYGEN AND 2 G OF HYDROGEN. It is intended mainly for adding hydrogen peroxide to either colloidal silver or distilled water at varying concentration strengths. See the answer. The molar mass of water is 18.013 g/mol.

Answer 2

Answer:

Let the first angle be a.

The second angle is 20 more than twice of a.

OR 2a + 20.

Since the two are supplementary, their sum would be 180 degrees.

a + (2a + 20) = 180

OR 3a + 20 = 180

OR 3a = 160

OR a = 160/3 degrees.

Also, the other angle => 2(160/3) + 20 = 380/3 degrees.

Hope this helps! :)