Please answer quick!!! All the magnesium ions in the mixture come from magnesium oxide.
Using your answers to 2.1 and 2.2, calculate the mass of magnesium oxide needed to provide the
correct mass of magnesium ions in 200 g of the mixture.

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42%

step-by-step explanation:

we know,

total people = 60

total males = 25

percentage of males

= 25/60 × 100

= 25/6 × 10

= 25/3 × 5

= 125 / 3

= 41.

rounding of = 42%

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41*67/2=1373.5

step-by-step explanation:

i just used a calculator

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm