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elena-s [515]
2 years ago
15

Help me answer this please

Chemistry
1 answer:
Vlad1618 [11]2 years ago
3 0
Its a scam dont press the link
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WHATS THE DIFFERENCE BETWEEN Fe AND FE2+
Grace [21]

Answer:

Fe is just the shortened version of Iron whereas Fe2+ is a positive ion,cation to be more specific

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3 years ago
Which of the following techniques can be used to separate a heterogeneous mixture into its component parts? (3 points)
avanturin [10]

Answer:

Separation by density

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6 0
3 years ago
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If a substance has a mass of 12.50 g and takes up 3.4 mL of space, what is the density?
miskamm [114]

Answer:

The answer is

<h2>3.68 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

<h3>density =  \frac{mass}{volume}</h3>

From the question

mass of substance = 12.50 g

volume = 3.4 mL

The density of the substance is

density =  \frac{12.50}{3.4}  \\  = 3.676470588...

We have the final answer as

<h3>3.68 g/mL</h3>

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3 years ago
Spontaneous generation is a mistaken idea because living things:
Oduvanchick [21]
B. Are produced only by living things


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3 years ago
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Help please chemistry will give brainliest
Jlenok [28]

Answer:

Explanation:

The Ideal Gas Law states that PV=nRT.

Rearrange that into P/n=RT/V.

In this case, the cylinder is rigid so the volume, V, does not change.

Temperature does not change either.

Out of 450 grams of gas, 150 grams leak out. So only 450-150 = 300 grams is left.

n is number of moles which is dependent on mass:

n1/n2 = 450/300 = 3/2

P1/n1 = RT/V = P2/n2

P2 = P1/n1*n2

= 7.2/3*2

= 4.8 atmosphere

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3 years ago
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