They are bile salt, cholesterol and lecithin.

4P4+5S8=4P4S10 n(P4)=19.35mole n(S8)=5.08mole n(P4S10)=4/5*5.08*80.0%=3.25mole.

5.10*101.11=515.661g 515.661/(515.661+4.47*1000)=0.1034.

Made of pesticides and fertilizers.

N(CaCO3)=400/100=4mole n(CO2)=n(CaCO3)=4mole. 4*22.4=89.6 liters.

2Mg+O2=2MgO n(MgO)=2(O2)=2*0.2=0.4 mole

Rational and irrational numbers.

It is metathesis reaction.

Chemical is used to understand and transform the human material world.

213.90*130%=278.07

Inorganic Chemistry: Chemical elements, inorganic synthetic chemistry, inorganic polymer chemistry, inorganic solid state chemistry, coordination chemistry (that is, complex chemical), isotope chemistry, bio-inorganic chemistry, organometallic chemistry, enzyme chemistry, metal Chemistry: General organic chemistry, organic synthetic chemistry, metal and non-metallic organic chemistry, physical organic chemistry, bio-organic chemistry, organic chemistry. Physical Chemistry: Structural chemistry, thermal chemistry, chemical … Read more

The role of economisers to predict the economic, to help economic development.

Their purchasing power is different. Consumption level of high  income groups is high, and low income people's consumption level is low.

The Molecular Weigh of Calcium Phosphorus is about310,The Molecular Weigh of Phosphorus is about31,( 2*31/310)*500=100  ,so there are  100 Grams .

There is not a person named Jaxon Bieber, but there is a boy named Justin Bieber, he is 16 years old.

Set y=k/x. K=xy=8*0.125=1 y=1/x.

0+3=3, 3-2=1 so the coordinate of A is A(3,1).

It is a decomposition reaction.

4NH3+5O2=4NO2+6H2O   160    184   5.3g    x 160/5.3=184/x x=6.905g 3.1/6.905*100%=44.90%

N(CO2)=2n(C2H6)=2*1.00=2.00 moles.