Question

An allow contains 20% copper ,35% zinc and the rest as Nickel. In 1.5 kg alloy, the rest as Nickel. In 1.5 alloy, the quantity of Nickle is

Answer 1

Answer: The amount of nickel in the alloy is 0.675 kg

Explanation:

We are given:

Percentage of copper in alloy = 20 %

Percentage of zinc in alloy = 30 %

Percentage of nickel in the alloy = [100-(20+35)]=45\%[100−(20+35)]=45%

To calculate the mass of nickel in alloy, we use the equation taht is used to calculate percentage composition, which is:

\%\text{ composition of nickel}=\frac{\text{Mass of nickel}}{\text{Mass of sample}}\times 100% composition of nickel=

Mass of sample

Mass of nickel

×100

Mass of alloy = 1.5 kg = 1500 g (Conversion factor: 1 kg = 1000 g)

Percentage composition of nickel = 45 %

Putting values in above equation, we get:

\begin{gathered}45\%=\frac{\text{Mass of nickel}}{1500g}\times 100\\\\\text{Mass of nickel}=\frac{45\times 1500}{100}=675g=0.675kg\end{gathered}

45%=

1500g

Mass of nickel

×100

Mass of nickel=

100

45×1500

=675g=0.675kg

Hence, the mass of nickel in given alloy is 0.675 kg

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