n(CH4)=V/Vm=6.72/22.4=0.3 моль
m(CH4)=n*M=0.3*16=4.8 г.
Ответ: 4.8 г
C6H12O6 ==> 2C2H5OH + 2CO2
C2H6O + 3O2 = 2CO2 + 3H2O
Al2O3 + 3H2SO4 = Al2(SO4)3 + 3H2O
Al2O3 + 6H(+) + 3SO4(2-) = 2Al(3+) + 3SO4(2-) + 3H2O
Al2O3 + 6H(+) = 2Al(3+) + 3H2O
BaCl2 + H2SO4 = BaSO4 + 2HCl
Ba(2+) + 2Cl(-) + 2H(+) + SO4(2-) = BaSO4 + 2H(+) + 2Cl(-)
Ba(2+) + SO4(2-) = BaSO4
Ответ:1) Shoqan Ualikhanov wasn't from Turkey. He was from Kazakhstan.
2) Luivinov Andreeva isn't a cycling champion. She is a karting champion.
3) Henry Ford didn't invent the first plane. He invented the first car.
4) Charles Darvin and Albert Einstein weren't interested in shopping. They were interested in science.
5) Amelia Earhart wasn't a famous actor. She was a pilot.
6) John F. Kennedy and Abraham Lincoln weren't Russian presidents. They were USA presidents.
Объяснение: