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tester [92]
3 years ago
9

If half a kilogram of potatoes costs 0.0125$ how many kilograms could be bought for 50 cents?​

Mathematics
1 answer:
Oliga [24]3 years ago
5 0

Answer:

4000 kilos

Step-by-step explanation:

on my assignment i got t right i hope it works for u

(edit) mostly be 2000 kilos but prob best answer could be 200 ill edit if its wrong

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A pharmacist wants to mix a 30% saline solution with a 10% saline solution to get 200 mL of a 12% saline solution. How much of e
Bess [88]

Answer:

30% constituents=20 mL

10% constituents=180 mL

Step-by-step explanation:

x= 30% volume

y=10% volume

For our first equation, we know the total volume is 200 mL and is the sum

x+y=200

y=200-x (1)

For our second equation, we do a mass balance for 200 mL of final solution.

12% w/v = 0.12 g/mL

This means that in 1 mL of solution, we have 0.12 g of NaCl.

For any solution, concentration multiplied by volume will give the mass of NaCl:

Mass in x mL= C*V (g/mL) (mL)

So in 200 mL, we have

0.12*200 (g/mL) (mL)

=24g of NaCl

Cx*Vx + Cy*Vy=24

0.3x+0.1y=24 (2)

Substitute y=200-x into (2)

0.3x+0.1(200-x)=24

0.3x+20-0.1x=24

0.2x=24-20

0.2x=4

Divide both sides by 0.2

0.2x/0.2=4/0.2

x=20

Substitute x=20 into (1)

y=200-x

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10% constituents=180 mL

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3 years ago
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Step-by-step explanation:

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