High score is found in relation to high school moles of the formula 150

n=m/mn=v/vm

n=cvn=n/na

1. The basic definition of the calculation formula should be clarified.

1) n = m m, n is the quantity of matter (mol), m is the mass (g), m is the molar mass (g mol).

2) n = n na, n is the number of particles, and na is the add-dro constant.

3) N=v vm, v is the volume of the gas (L), vm is the molar volume of the gas under certain conditions (l mol), and in the standard condition, vm =

4) n = cv, c is the amount concentration of the solute in the solution (mol l), v is the volume of the solution (l).

2. Know and be proficient in common conversion and inference formulas.

1) The conversion between the quantity concentration (c) and the mass fraction (w) of the substance.

c = 1000dw m, d is the density of the solution (g cm3) and m is the molar mass of the solute (g mol).

2) Conversion between the mass fraction (w) and solubility (s) of the saturated solution.

w=s/(100+s)

3) The ratio of the volume of the gas to the ratio of the quantity of the substance to the ratio of the number of molecules of the gas under the same condition.

v(a):v(b)=n(a):n(b)=n(a):n(b)

4) The ratio of the density of the gas to the ratio of molar mass to the ratio of the relative molecular mass under the same condition.

d(a):d(b)=m(a):m(b)=mr(a):mr(b)

Therefore, if the relative density of a gas to hydrogen is 16, that is, the gas has mr=16 2 32

This one is often used.

Mass: 1) The quantity concentration of a substance is the number of moles of a substance per unit volume, formula: c=n v, unit: mol l

2) The molar volume of a gas is the volume of 1 mole of gas in a standard condition (the definition of a standard condition: a temperature of 0 degrees Celsius, a standard atmosphere). The molar volume of all gases in standard conditions is.

3) Molar mass is the mass of 1 mole of a substance, which is numerically equal to its relative molecular mass, for example: the molar mass of O2 is 32g mol.

Volume: The relative molecular mass of air is about 29

Then the relative molecular mass of the substance is 29d

n (amount of substance) = m (mass) m (relative molecular mass) = m 29d

So vm (molar volume) = 29dv m

Concentration: C=NV=(MM) [MO(P*1000)]=1000PWM

Note: where Mo represents the total mass of the solution, so the mass fraction of the solute w = m Mo

m = m m m m m

It reads as follows:

1) n = m m, n is the quantity of matter (mol), m is the mass (g), m is the molar mass.

g/mol）。

2) n=n na, n is the number of particles, and na is the additive dro constant of Akubi.

3) n=v vm, v is the volume of the gas (l), vm is the molar volume of the gas under certain conditions.

l mol), in standard condition.

down, vm=.

4) n=cv, c is the concentration of the solute in the absolute solution.

mol l), v is the volume of the solution (l).

The mass possessed by a substance per unit of substance is called molarmass, which is denoted by the symbol m. When the quantity of a substance is measured in mol, the unit of molar mass is g mol, which is numerically equal to the atomic mass or molecular mass of the substance. Molar mass refers to the quantity of a unit of substance, the mass possessed by a substance, the expression.

For: molar mass = mass of the mass of the substance.

Note: 1. The above expression is used to calculate the molar mass of a substance without knowing the chemical formula of the substance.

2. If we know what a substance is, then the molar mass is a fixed value, which is numerically equal to the relative atomic mass of the substance.

or relative molecular mass, such as the molar mass of water H2O m==1*2+16*1g mol==18g molRegardless of whether the mass of water is still 100g, then the molar mass of water is 18g mol.

It will not change, and the molar mass of Fe m==56g mol does not matter whether it is 100g fe or 10000gfe, the molar mass of Fe will always be 56g mol.

3. Then the expression m=m n is generally used to find the mass of a substance or the quantity of a substance, that is, in this expression: the molar mass is a fixed value, and the mass is proportional to the quantity of the substance.

The quantity and mass of the substance, the conversion of molar mass, the conversion of volume to the volume of molar branches: n=m bond resistance m=v vm

Conversion of the amount of spring of a substance to the amount and concentration of a substance:

c=n/v

Molar massFormula: m=m n.

The amount per unit substance.

When the quantity of a substance is measured in mol, the unit of molar mass is g mol, which is numerically equal to the atomic or molecular mass of the substance. For a compound, its molar mass is fixed. The mass of a substance changes with the amount of matter.

Every 1 mole of any substance (microscopic substance, such as molecules, atoms, etc.) contains Avogadro.

Constant (about a particle.)

Particulate refers to very fine particles, including molecules, atoms, ions, etc., which are invisible to the naked eye, as well as their combinations. For example, Newton.

The theory that light is a kind of particle, called the particle of light. in clinical medicine.

, particulates can cause clinical harm.

Note:

1. The expression on the grinding is used to calculate the molar mass of a substance without knowing the chemical formula of the substance.

2. If we know what a substance is, then the molar mass is a fixed value, which is numerically equal to the relative atomic mass of the substance.

or relative molecular mass, such as the molar mass of water H2O m==1*2+16*1g mol==18g molRegardless of whether the mass of water is still 100g, then the molar mass of water is 18g mol.

n=m/mn=n/na

gas) n = v vm

The amount of concentration of the substance.

c = the amount of solute material in the volume of the solution.

c = 1000 * solution density * percentage concentration of mass of the substance molar mass of the solute.

The amount of matter – n

The mass of the substance – m

Molar mass – m

1) n=m m, where n is the amount of matter.

mol), m is the mass (g), and m is the molar mass.

g mol) (2) n = n na, n is the number of particles, na is the add-dro constant (3) n = v vm, v is the volume of the gas (l), vm is the molar volume of the gas under certain conditions (l mol), in the standard case, vm =