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coldgirl [10]
3 years ago
9

17. An industrially important element contains

Chemistry
1 answer:
likoan [24]3 years ago
8 0

Answer:

Iron (Fe)

Explanation:

The number of electrons (-) is usually the same as the number of protons (+) in the atom of the element (unless it is an ion).

The element described has 26 electrons, so we can assume that it has 26 protons as well. The number of protons in an atom is the atomic number of element that the atom is.

Element 26 on the PTE is Iron (Fe), which does rust (oxidation) in air and water.

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Mass of 60.009 g and radius of 1.02 cm what is the density of the sphere in (g/ml)
alexandr402 [8]
Density is given as mass / volume.

Mass is the sphere is 100 g.

Volume of the sphere = (pi∗r3)∗4/3
(
p
i
∗
r
3
)
∗
4
/
3

=(4∗22∗3∗3∗3)/(7∗3)cm3
=
(
4
∗
22
∗
3
∗
3
∗
3
)
/
(
7
∗
3
)
c
m
3

=792/7
=
792
/
7
cm3
3

Therefore, Density is 100/(792/7)g/cm3
100
/
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792
/
7
)
g
/
c
m
3

Which gives: density = 0.883838 g/cm3
g
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m
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If you want to change the units to kg per cubic metres, then we need to divide this value by 1000( for g to kg) and multiply by 100 * 100 * 100 (for cm to m).

This makes the density to be 883.83 kg/m3
4 0
3 years ago
A solvent typically boils at 125.0∘C and a solution made from that solvent boils at 128.5∘C. If this solvent has a Kb value of 2
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Answer:

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3 0
2 years ago
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Matter is anything that has mass and occupies space, It can exist in 3 states, or phases: solid, liquid, and gas.

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Gas molecules are far apart and fill the container

completely.
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2 years ago
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