Senior 1 Chemistry Brief Questions, Senior 1 Simple Chemistry Concepts Multiple Choice Questions

1go2 and 1go3.

The number of molecules contained is the same.

Wrong. The number of molecules is: Na 32 and Na 48, which are unequal.

The number of atoms contained is different.

Wrong. The atomic number is: 2 na 32 is equal to 3 na 48.

The number of atoms contained is the same.

Right. The atomic number is: 2 na 32 is equal to 3 na 48.

1go3 contains a large number of molecules.

Wrong. The number of molecules contained in 1go3 is less.

It is true that the number of atoms contained is the same.

O2 is a molecule, which is made up of two atoms.

1go2 has more molecules than 1go3 and the same number of atoms.

n = (total number of molecules) (Avogadro's constant) = m m number of atoms = number of molecules * (number of components).

For example, the number of atoms of oxygen is the number of molecules multiplied by 2

Ozone is the number of molecules multiplied by 3

The number of atoms is the number of atoms it contains.

Number of atoms = Avogadro's constant The amount of matter of an atom.

The same is true for the number of molecules.

The molar mass of O2 is 32, that of O3 is 48, and that of Oxygen is 16 because N=MM

So correct.

The number of atoms, the number of oxygen atoms contained in 1go2.

The number of molecules, the number of O2 contained in 1go2.

That's right. The number of atoms refers to the number of O, and the number of molecules refers to the number of O2 or O3.

The difference between the number of atoms and the number of molecules. For example, CO2 gas is made up of CO2 molecules, which have 1 C atom and 2 O atoms. That's the difference. If it is 1 O2 molecule, it means that there are 2 O atoms.

Number of atoms = (m m) * n (Avogadro's constant) * n (number of atoms).

Number of molecules = (m m) * n (Avogadro's constant).

The choice of D, A, ferric chloride should be a solution, unless it is hydrolyzed into iron hydroxide to form colloid B, this is the solution, C, solution, solute: I2. Solvent: ethanol.

d, solid sols.

The solute of C iodine wine is I2, AB is an ion, and D should not be.

dTinted glass. It belongs to solid sols.

A b is very simple and tells you that it is a solution.

c is an alcohol solution of iodine.

D Colored glass colloid, also known as colloidal dispersion, is a homogeneous mixture in which two different states of substance are contained, one dispersed and the other continuous. The dispersed part is composed of tiny particles or droplets, and the diameter of the dispersed particles is between 1 nm and 100 nm. Colloids are a kind of dispersion systems with a diameter of dispersed particles between the coarse dispersion system and the solution, which is a highly dispersed multiphase heterogeneous system.

The remaining 3 are all colored transparent solutions.

Examples: 1. Smoke, clouds, fog aerosols, smoke quartz, colored glass, crystal are solid sols, protein solutions, and starch solutions are liquid sols; 2. Starch colloid, protein colloid is molecular colloid, soil is particle colloid;

1 2mol hydrogen and 1 2mol iodine are reacted to form 1mol of Hi, which requires 1 2molH-h bond and 1 2Moli-I bond to break (absorb the energy of 1 2*436+1 2*151= kJ), and to generate 1molH-I bond, 299kJ of energy is released. then the heat emitted is. The answer is.

Note: The symbols of the values of absorbed energy and exerted energy are reversed.

Note that if a 1 molar h-i bond is generated, the energy released is .

nno=,n to get the total number of electrons = 3*, then copper and magnesium lose electrons together. or noh-=, the amount of precipitated m(oh)2 species is.

In summary, x+y=; The mass of the mixture, then 24x+64y= solves x=,y=

Precipitation mass =