You didn't give your choices but sin 21 equals 0.358.
CH4 + 02 → H20 + CO2
balance equation
CH4 + 2O2 → 2H2O + CO2
4 ÷ ( 12 + 4 ) = 0.25 mol
1 : 2
no mole of H2O = 0.25 × 2 = 0.5 mol
mass of H2O = 0.5 × ( 2 + 16 ) = 9g
My answer is B hope it helps
Answer:
D. they showed that organic molecules such as amino acids could be produced from inorganic molecules
Answer: yes I do think that humans care more about land and soil more than organisms because if they cared about organisms they would not be destroying their habitats to make new ones for themselves. Also, humans care about land because of money and trust me money doesn't grow on trees so they find any way to get money, and they don't care if they have to destroy organisms habitats to get it.