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telo118 [61]
3 years ago
11

12. A chemist has 40 mL of a solution that is 50% acid. How much water should he add to make

Mathematics
1 answer:
Step2247 [10]3 years ago
4 0

Answer:

Volume of pure Acid in -50- LITRES of the solution= 10- litres. Let “V”- litres of water be added, then

Therefore 10= (50+ V) x8/100 .

So 10= 4 + 8V/100

8V/100 = 10–4= 6

So V= 6 x 100/8= 600/8= 75- LITRES.

So on adding 75- litres of water to the acid solution, the percentage of acid drops to 8% .

Check: Percentage of acid in 125- LITRES of acid solution, which contain 10- LITRES if pure Acid

= 10/125 x 100= 8% .

Step-by-step explanation:

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3 years ago
Read 2 more answers
Roberto tiene 20 balones entre azules y rojos el tiene mas balones rojo que azules y los guarda en cuatro bolsas que contienen l
Anuta_ua [19.1K]

Se pueden concluir dos posibilidades para cada bolsa y toda la colección:

  1. 4 balones rojos y un balón azul, lo cual lleva a 16 balones rojos y 4 balones azules.
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<h3>¿Cuántos balones rojos tiene Roberto en las cuatro bolsas?</h3>

En este problema conocemos que Roberto tiene 20 balones entre azules y rojos y que existen más balones rojos que azules. Puesto que los balones son objetos que pueden contarse, los datos a buscar deben ser números enteros y positivos y que están distribuidos equitativamente en cuatro bolsas. Entonces las cantidades de balones por bolsa son:

x = 20 / 4

x = 5

Existen 5 balones por bolsa y bajo la consideración de que existen balones azules, que cada bolsa tienen la misma proporción de balones rojos a azules y que los balones rojos son más que los balones azules, se pueden concluir dos posibilidades para cada bolsa:

  1. 4 balones rojos y un balón azul, lo cual lleva a 16 balones rojos y 4 balones azules.
  2. 3 balones rojos y dos balones azules, lo cual lleva a 12 balones rojos y 8 balones azules.

Para aprender más sobre proporciones: brainly.com/question/27957192

#SPJ1

7 0
2 years ago
A machinist drilled a conical hole into a cube of metal as shown.
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Answer:

512ft³

Step-by-step explanation:

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3 years ago
Easy 10 points and brainliest :)
Llana [10]

Answer:

on the x-axis

Step-by-step explanation:

If x is less than 0, that means it's to the left of the origin, and if y = 0, then that means the point lies on the x-axis.  Hence, (x,y) is on the x-axis.

Cheers.

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4 years ago
Which property does each equation demonstrate
sveticcg [70]

Answer:

a

Step-by-step explanation:

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