Question

1. Чему равна массовая доля: углерода в CO2 , кислорода в H2CO3 2. Определите формулу соединения: водорода-5,9 %, кислорода-94,1% СРОЧНО!!!!!

Answer 1

1) w=12/44=0,27=27%
w=48/62=0,774=77,4%

2) H2O2- пероксид водорода(перекись)

Answer 2

Mass Fraction of Carbon in CO2

The mass fraction of carbon in carbon dioxide (CO2) can be calculated by dividing the mass of carbon in CO2 by the total mass of CO2. To determine the mass fraction, we need to know the molar mass of carbon and the molar mass of CO2.

The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of CO2 is approximately 44.01 g/mol.

To calculate the mass fraction of carbon in CO2, we can use the following formula:

Mass Fraction of Carbon = (Mass of Carbon / Mass of CO2) * 100%

Let's calculate the mass fraction of carbon in CO2:

Mass of Carbon = (12.01 g/mol) * 1 mol = 12.01 g

Mass of CO2 = (44.01 g/mol) * 1 mol = 44.01 g

Mass Fraction of Carbon = (12.01 g / 44.01 g) * 100% ≈ 27.28%

Therefore, the mass fraction of carbon in CO2 is approximately 27.28%.