1- Write postulates of Dalton's atomic theory.2-Write law of conservat

1.	1- Write postulates of Dalton's atomic theory.2-Write law of conservation of mass. Give three examples.3-Write law of constant proportion. Give three examples.4- What is formula mass?5- Write formula and mass of Calcium Sulphite,Calcium carbonate, Sodium Carbonate6- Calculate mass of oxygen atom in a) 20g of Calcium carbonate b) 71 gm of Sodium SulphatePLS ANSWER IT IN SHORT PLSSS
Answer» Explanation: 1- All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms 2-The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted. 3- The law of constant composition says that, in any particular chemical compound, all samples of that compound will be made up of the same elements in the same proportion or ratio. For example, any water molecule is always made up of two HYDROGEN atoms and one oxygen atom in a 2:1 ratio 4-This quantity is called the formula massThe SUM of the masses of the elements in the formula of an ionic compound.. The formula mass is obtained by adding the masses of each individual atom in the formula of the compound. 5-Calcium sulfite: CaSO3 Calcium carbonate: CaCO3 Sodium carbonate: : Na₂CO 6: Sodium carbonate + Ethanoic acid → Sodium ethanoate + Carbon dioxide + Water 5.3 g + 6 g → 8.2 g + 2.2 g + 0.9 g LHS RHS 11.3 g = 11.3 g (Mass of REACTANT) (Mass of product) This shows, that during a chemical reaction mass of reactact = mass of product. hope it helps

1- Write postulates of Dalton's atomic theory.2-Write law of conservation of mass. Give three examples.3-Write law of constant proportion. Give three examples.4- What is formula mass?5- Write formula and mass of Calcium Sulphite,Calcium carbonate, Sodium Carbonate6- Calculate mass of oxygen atom in a) 20g of Calcium carbonate b) 71 gm of Sodium SulphatePLS ANSWER IT IN SHORT PLSSS

Answer»

Explanation:

1- All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms

2-The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases, equals the original mass of the charcoal and the oxygen when it first reacted.

3- The law of constant composition says that, in any particular chemical compound, all samples of that compound will be made up of the same elements in the same proportion or ratio. For example, any water molecule is always made up of two HYDROGEN atoms and one oxygen atom in a 2:1 ratio

4-This quantity is called the formula massThe SUM of the masses of the elements in the formula of an ionic compound.. The formula mass is obtained by adding the masses of each individual atom in the formula of the compound.

5-Calcium sulfite: CaSO3

Calcium carbonate: CaCO3

Sodium carbonate: : Na₂CO

6: Sodium carbonate + Ethanoic acid → Sodium ethanoate + Carbon dioxide + Water

5.3 g + 6 g → 8.2 g + 2.2 g + 0.9 g

LHS RHS

11.3 g = 11.3 g

(Mass of REACTANT) (Mass of product)

This shows, that during a chemical reaction mass of reactact = mass of product.

hope it helps

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