You re so good at chemistry, help, how to calculate the quality of the third question

According to , the reaction equation is obtained:

3a2+b2=2ba3

There are 3g of A2 in the 17g product, and the other 14g is B2, and the relative molecular mass of B2 is 28, so the B2 involved in the reaction is 14 28=, then A2 should be, so the relative molecular mass of A2 should be 2, that is to say, A2=H2 (hydrogen), B2=N2 (nitrogen), and the two react to form ammonia NH3, which is completely in line with the topic.

Answer your question:

6 A2 + 3 Bs = 4 A3B and one more B2 molecule: about one B2 molecule on both sides, isn't it 6 A2 + 2 B=4 A3B, and dividing by 2 is 3A2 + B2 = 2Ba3.

b2 is 17-3 equal to 14g14 28 is equal to 2 moles and the product 2 3 times 2 is 4 3 17 4 3

The easy-to-obtain reaction equation is 3a2+xb2====2a3bx

According to the law of conservation of mass, the mass of the B2 species participating in the reaction is 17-3=14g, that is, the amount of B2 species participating in the reaction is .

But I can't see your diagram, so I don't know what the ratio of the amount of A2 to B2 matter is, so I can only go so far.

This equation is: 3A2+B2=2C, i.e., 3H2+N2=2NH3, so the relative molecular mass of the product is 17

The mass of carbon is 10g*36%=

The molar of carbon is conserved according to the mass of element c, which corresponds to precipitation, 100*

The mass of carbon is 10g*36%=

Moles of carbon. Let the CO have the carbon.

28/44=x/(

x=?Later, you can use the reaction formula to calculate. It's more troublesome to write on my mobile phone. So I'm sorry.

.The mass fraction of 100g of dilute hydrochloric acid and calcium carbonate is exactly completely reacted, and the mass fraction of the solute in the solution after the reaction is obtained.

The oxygen content in the NaOH solution is 80%, and the mass fraction of the solute is found.

The mass fraction of the solute was obtained by dissolving 500 volumes of HCl gas in 1 volume of water under standard conditions.

There is xmol in the two parts of the solution, and there is ymol. in khc2o4

1molC2O42- is converted to CO2 to transfer 2mol electrons, and KMno4 is reduced to Mn2+ to transfer 5mol electrons.

2x+y=2x+2y=16/

x=,y=c%c%khc2o4=

Let the quality of salt in MSG be x.

agno3+nacl=hno3+agcl↓x

x=mass fraction of NaCl is:

Answer: The mass fraction of salt in monosodium glutamate is 20%, which is in line with the labeled content.

(ag+)+cl-==agcl↓

The mass of NaCl is:

The mass fraction of NaCl is:

Check the table m silver = 108 m chlorine = m sodium = 23 m silver chloride = n silver = m silver m silver = and sodium chloride silver chloride molar reaction ratio is 1 so sodium chloride has so m sodium chloride = the mass fraction of NaCl is A......