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3 years ago

When two ice skaters initially at rest push off one another, their final momenta are..."

Chemistry

1 answer:

salantis [7]3 years ago

8 0

Answer:B

Explanation:

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what would you be most likely to measure by immersing an object in waterand seeing how much the water level risies

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Measuring the volume of a object.

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3 years ago

The is an organ that supplies blood and nutrients to a developing embryo.

statuscvo [17]

The $\sf\purple{placenta}$ is an organ that supplies blood and nutrients to a developing embryo.

Explanation:-

The placenta is a large temporary organ that develops in the uterus during pregnancy (in female mammals).
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3 years ago

How many milliliters of a 1:2000 drug "i" solution and a 7% drug "i" solution mixed would make 120ml of a 3.5% solution of drug

yanalaym [24]

To solve this problem, let us say that:

x = volume of 1:2000 drug "i" solution

y = volume of 7% drug "i" solution

Assuming volume additive, then this forms:

x + y = 120 mL

x = 120 – y ---> 1

1:2000 also refers to 0.0005 concentrations and 7% also refers to 0.07 concentrations. By doing a component balance:

0.0005 x + 0.07 y = 0.035 (120 mL)

0.0005 x + 0.07 y = 4.2

Substituting equation 1 into this derived equation to get an equation in terms of y:

0.0005 (120 – y) + 0.07 y = 4.2

0.06 – 0.0005 y + 0.07 y = 4.2

0.0695 y = 4.14

y = 59.568 mL = 59.57 mL

From equation 1, x would be:

x = 120 - 59.57

x = 60.43 mL

Answers:

59.57 mL of 1:2000 drug "i" solution

60.43 mL of 7% drug "i" solution

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3 years ago

Which of these substances contributes to soap’s slippery texture?

astraxan [27]

Answer: a base

Explanation:

Bases are usually slippery in nature

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4 years ago

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What is mass? How is the mass of an object determined?

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