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Alex73 [517]
3 years ago
8

At room temperature, which of these are oxide minerals? Select all that apply.

Chemistry
2 answers:
DerKrebs [107]3 years ago
7 0
C. and d. are oxyminerals.
Klio2033 [76]3 years ago
3 0

Answer:  C.Al_{2}O_{3} and D.Fe_{3}O_{4}

Explanation: Oxide minerals are the minerals in which the oxide anion is bonded to the central metal atom. These are useful for industrial purposes.

Out of the given options, only two of them can be categorized as the oxide minerals.  

H2O and CO2 will not be considered as oxide minerals.

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X^2/2x^5=2<br><br>how do you solve this ?
Natasha2012 [34]

Answer:

x=\sqrt[3]{\frac{1}{4}}

Explanation:

\displaystyle\frac{x^2}{2x^5}=2\\\\x^2=4x^5\\\\1=4x^3\\\\x^3=\frac{1}{4}\\\\\\x=\sqrt[3]{\frac{1}{4}}

8 0
3 years ago
A sample of nitrogen occupies 10.0 liters at 25°C and 98.7 kPa. What would be the volume at 20°C and 102.7 kPa?
krek1111 [17]
To solve the problem, we assume the sample to be ideal. Then, we use the ideal gas equation which is expressed as PV = nRT. From the first condition of the nitrogen gas sample, we calculate the number of moles.

n = PV / RT
n = (98.7x 10^3 Pa x 0.01 m^3) / (8.314 Pa m^3/ mol K) x 298.15 K
n = 0.40 mol N2

At the second condition, the number of moles stays the same however pressure and temperature was changed. So, the new volume is calculated as follows:

V = nRT / P
V = 0.40 x 8.314 x 293.15 / 102.7 x 10^3
V = 9.49 x 10^-3 m^3 or 9.49 L
7 0
3 years ago
In a metal what is not given an assigned location and thus can drift
Allushta [10]
In a metal, "Electrons" <span> is not given an assigned location and thus can drift

In short, Your Answer would be Option C

Hope this helps!</span>
6 0
3 years ago
The electrical charge of the nucleus is determined by:
elixir [45]
I think it’s electron:)
7 0
3 years ago
Please help with 14-16 <br> Thank you!
Natalka [10]
I don't know about 14, but 15 is (4), because a liquid draws in heat to turn into a gas. 16 is (2), because to turn into a cold solid, something has to release heat.
4 0
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