Q. 173.6( 25 Votes )

# The ratio of molecular weight of Hydrogen and Oxygen in water is 1:8. Set up an equation between Hydrogen and Oxygen and draw its graph. From the graph find the quantity of Hydrogen if Oxygen is 12 grams. And quantity of oxygen if hydrogen is gms.?

[Hint : If the quantities of hydrogen and oxygen or ‘x’ and ‘y’ respectively, then x : y = 1:8 ⟹ 8x = y]

Answer :

Given that, ratio of molecular weight of Hydrogen and Oxygen in water is 1:8.

Now, Let the quantity of hydrogen and oxygen or ‘x’ and ‘y’ respectively.

⇒ 8x = y

⇒ y = 8x is the equation.

For graph, we’ll first make the table of solutions by putting some random values of x and thereafter we’ll find corresponding values of y and then we’ll plot these points on graph, join them and extend them in straight line to find the graph.

(Note: ∵ equation is linear graph will always be straight line.)

Table of solutions for the given equation-

GRAPH:

From the graph, the quantity of Hydrogen if Oxygen is 12 grams is grams. (pt. E)

And quantity of oxygen if hydrogen is grams is 12 grams (pt. E).

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