Help me solve a few chemistry questions, chemistry questions, help me solve them

1. As the name suggests, the number of nuclear charges is the number of charges carried by the nucleus, which is numerically equal to the number of protons;

2. The basic particles that make up matter are: molecules, atoms, and ions;

Electrically neutral particles are: molecules, atoms, neutrons;

The positively charged ones are: (cation), proton, nucleus;

Maintaining chemical properties are: molecules.

What must change in a chemical reaction is the molecule.

The number of atoms must be equal: protons and electrons;

3. S2-,2- is the superscript.

1.The number of nuclear charges is the number of electrons carried by the atom Number of nuclear charges = atomic number = number of electrons outside the nucleus = number of protons.

2.1 molecule atom ion electron 2 molecule atom neutron 3 ion (not necessarily) proton nucleus.

4 molecules, atoms, ions 5Nucleus ion 6Proton electrons.

3.The upper left corner is the mass number (32), the lower left corner is the number of protons, and the upper right corner is 2 negative charges.

Number of neutrons = number of masses - number of protons Number of electrons = number of protons + 2

1.Number of positive charges carried by the nucleus = number of protons.

2.Molecule atom ion.

The molecule atom neutron.

Protons are nucleus.

Molecule atoms.

Molecule. Proton electrons.

3.s2- 2- marked in the upper right corner.

Protons are positively charged, neutrons are not charged, and electrons are negatively charged.

Protons, neutrons, are inside the nucleus, and electrons are outside the nucleus.

The chemical formula of carbon reducing copper oxide at high temperature is as follows: C + 2Cuo = high temperature = 2Cu + CO2X

x = (12 160) * 80 = 6 grams.

Answer: The quality of the spring with the ants that require carbon is at least a kilogram of hidden oranges.

Monoacids cannot form acid salts.

Diacids form an acid salt.

N-1 acid can form n-1 acid salts.

The reaction can occur when alkali is added to the acid salt solution.

Cu2(OH)2CO3 mg(OH)Cl oxygenate and anoxylate: Whether the acid ion contains oxygen metal salts and ammonium salts: classified by cation.

Sulfates, nitrates, phosphates. Sodium salt, copper salt, and iron salt are classified according to the acid anion. Iron salts and ferrous salts are classified according to the elements to which metal cations belong: Iron salts (salts containing iron ions + 3 valence) Ferrous salts (salts containing ferrous ions + 2 valence).

Strong and weak salts are classified according to the strength of the acid anion.

1. Monobasic acid cannot form acid salts; Diacids form an acid salt. N-1 acids form n-1 acid salts.

2. Can cBasic salts: In addition to acid ions, the anions formed during ionization include hydroxide ions, and the cations are metal ions (or NH4+) salts. It can be seen that when the acid and base are neutralized, the alkali is excessive, the acid is insufficient, and part of the hydroxide in the alkali is neutralized, and the hydroxide is left.

Basic copper carbonate: Cu2(OH)2CO3 Basic magnesium chloride: mg(OH)Cl

c.Other types of salts aOxygenates and anoxic salts – classified by: Whether the elemental composition contains oxygen or not.

b.Metallic salts and ammonium salts – different by cation.

c.Sulfates, nitrates, phosphates – different by acid anion.

d.Sodium salt, copper salt, iron salt. By the elements that make up the cation.

e.Iron salts and ferrous salts - according to the valency of iron elements.

f.Strong and weak acids - the strength of the acid corresponding to the composition of the anion.

72g, 36g (100g+36g) multiplied by 100% = NaOH solubility must be greater than 8g

The solute mass fraction is the solute mass divided by the total solute plus solvent mass (solution mass) multiplied by one hundred percent.

8g 100g multiplied by 100% = 8%.

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1. Through the solubility, it can be seen that 200 grams of water can dissolve up to 72 grams of salt, so the salt water that can be obtained is 200 + 72 272 grams.

The mass fraction of salt in the resulting brine was 72 272

2. The solute mass fraction of the obtained sodium hydroxide solution is 8 (8+92) 8%.

1.Clean energy has only learned hydrogen and methane (CH4), since it is said to be elemental, it is hydrogen (H2).

2.The sum of the valencies of the complete chemical formula is 0, NO2 +4

no→+2no2→+4

hno3→+5

3.Solution: (1) According to the conservation of total mass, the mass of carbon dioxide is, A: carbon dioxide is generated;

2) Let the mass of CaCO3 in the solid mixture be Xg

caco3+2hcl═cacl2+h2o+co2↑

xx=5g, then the caCO3% in the limestone sample is 5 10 100% 50%, and the mass fraction of caCO3 in the solid mixture is 50%;

3) Let the mass of calcium chloride generated in this experiment be YG, CaCO3+2HCl, CaCl2+H2O+CO2

yy=then the mass fraction of the cacl2 solution of the product =

5+ 100%, A: The mass fraction of the cacl2 solution of the product is.

4.(1) 2H2O2===Mno2====2H2O+O2 (reaction of hydrogen peroxide to oxygen).

2) 2CO+O2===Ignition ===2CO2 (ignition of carbon monoxide to produce carbon dioxide).

3) The relative molecular mass of iron oxide (Fe2O3) is 160. ∴a:b=2：3

fe3o4+4co=3fe+4co2。The chemical formula of N is Fe3O4

4) x and y are composed of three identical elements x can be obtained from two of the above six substances through chemical reactions, and the chemical equation for the reaction is written.

h2o+co2═h2co3

y is a renewable green energy source with a chemical formula of:

c2h5oh

Be sure to adopt the answer is so hard... 555

2. The valency of nitrogen in the change of NO2 NO2 HNO3 is +4---2---4---5