"Calgon" is used to remove permanent hardness of water. If the molecular formula of calgon is $N a_{x} P_{y} O_{z}$ , then what is the value of $y + z - x$ ?

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Solution

Calgon is sodium hexametaphosphate $(N a_{6} P_{6} O_{18})$ .
So, here $x = 6, y = 6 and z = 18$
$∴ y + z - x = 6 + 18 - 6 = 18$

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"Calgon" is used to remove permanent hardness of water. If the molecular formula of calgon is NaxPyOz, then what is the value of y+z−x?

Calgon is sodium hexametaphosphate (Na6P6O18). So, here x=6, y=6 and z=18 ∴ y+z−x=6+18−6=18

"Calgon" is used to remove permanent hardness of water. If the molecular formula of calgon is $N a_{x} P_{y} O_{z}$ , then what is the value of $y + z - x$ ?

Calgon is sodium hexametaphosphate $(N a_{6} P_{6} O_{18})$ .
So, here $x = 6, y = 6 and z = 18$
$∴ y + z - x = 6 + 18 - 6 = 18$