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Schach [20]
3 years ago
9

Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture: iron (Fe)

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
7 0

Answer:

A. Element

Explanation:

Iron (Fe), chemical element and one of the transition elements, the most-used and cheapest metal.

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The carbon atoms in graphite and the carbon atoms in Diamond have different
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It's the actual structure of diamond which made the two different. Diamonds have a tetrahedral structure, and as for graphite, it's not structured in that way. The structures of the two is also the reason why diamond is harder than graphite.
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A scientist obtains a set of measurements that are very close to one another. These can be said to be:
pickupchik [31]

Answer:

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- Precise

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Then the answer is <u>precise</u>.

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2 years ago
In the electron cloud model, the electron cloud is denser in some locations than in others.
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3 years ago
A sample of a vapor occupies a volume of 500 mL at 65°C. If pressure remains constant, what is the volume of the gas at standard
DedPeter [7]

Answer:

403 mL

Explanation:

First, I will assume that the mole is 1, because you are not specifing this.

Now, with the innitial data, we need to get the pressure:

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Now if:

PV = nRT

Then:

P = nRT/V   and V = nRT/P

Let's calculate the P:

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The standard temperature is 0° C or 273 K so, the volume is:

V = 1 * 0.082 * 273 / 55.432

V = 0.40384 L or simply 403.84 mL

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3 years ago
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