Fill in the following blanks with suitable words:

(a) In water, the proportion of oxygen and hydrogen is _ by mass.

(b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called _

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Solution

(a) The hydrogen to oxygen is 2:16. or 1 : 8

(b) Law of conservation of mass .

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Q. Fill the following blanks with suitable words :
(a) In water, the proportion of oxygen and hydrogen is ...................by mass.
(b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ....................

Question 44
Fill in the blanks

(a) In a chemical reaction, the sum of the masses of the reactants and products remains unchanged. This is called ___.

(b) A group of atoms carrying a fixed charge on them is called ___.

(c) The formula unit mass of $C a_{3} (P O_{4})_{2}$ is ____.

(d) Formula of sodium carbonate is ___ and that of ammonium sulphate is ____.

Q. Fill in the blanks with suitable words:

2 M g + O_{2} \to 2 M g O

In this reaction the reactants are ______ and ________.

Fill in the following blanks with suitable words :

(a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called .......

(b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called .........

Fill in the following blanks with suitable words :

(a) Chemical equations are balanced to satisfy the law of ..........

(b) A solution made in water in known as an .............. solution and indicated by the symbol .......

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Fill in the following blanks with suitable words: (a) In water, the proportion of oxygen and hydrogen is ___ by mass. (b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called ___

(a) The hydrogen to oxygen is 2:16. or 1 : 8 (b) Law of conservation of mass .

Fill in the following blanks with suitable words:

(a) In water, the proportion of oxygen and hydrogen is _ by mass.

(b) In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called _

(a) The hydrogen to oxygen is 2:16. or 1 : 8

(b) Law of conservation of mass .