An alloy is made up of 25% copper, 30% iron an rest being zinc. Find the mass of zinc in 720 gm of the alloy
55% is Cu and FE so 45% is zinc
.45 *720 = 324 grams
That is assuming this is a MATH, not a Chemistry problem. If it were Chemistry they might be looking at 1/4 of the molecules are Cu, not 1/4 of the mass.
To find the mass of zinc in the alloy, we first need to calculate the mass of copper and iron in the alloy, and then subtract that total mass from the overall mass of the alloy.
Given:
Mass of the alloy = 720 gm
Percentage of copper = 25%
Percentage of iron = 30%
Step 1: Calculate the mass of copper.
Percentage of copper = 25%
Mass of copper = (Percentage of copper / 100) * Mass of the alloy
= (25 / 100) * 720 gm
= 0.25 * 720 gm
= 180 gm
Step 2: Calculate the mass of iron.
Percentage of iron = 30%
Mass of iron = (Percentage of iron / 100) * Mass of the alloy
= (30 / 100) * 720 gm
= 0.30 * 720 gm
= 216 gm
Step 3: Calculate the mass of zinc.
Mass of zinc = Mass of the alloy - (Mass of copper + Mass of iron)
= 720 gm - (180 gm + 216 gm)
= 720 gm - 396 gm
= 324 gm
Therefore, the mass of zinc in 720 gm of the alloy is 324 gm.