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True [87]
3 years ago
15

Helppp plsss !!!!!!!!!

Chemistry
1 answer:
geniusboy [140]3 years ago
5 0

Answer:

B. because there is two equations just like commutative property in math its the same thingish

Explanation:

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2 years ago
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Answer:

May be the instrument is incorrect or may be error in it.

Explanation:

The copper have not been detected by this test because the test may be not for the detection of copper, may be it is used for identification of another minerals. If there is copper in the lake sample but can't be detected in the test so it means that the instrument which is used for detection is not the right one  or having error in that instrument. Every mineral has a specific type of instrument that detect its presence, if we use incorrect instrument for the mineral then we can't detect the presence of that specific mineral.

8 0
2 years ago
The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti
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3 years ago
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8 0
2 years ago
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kolbaska11 [484]

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3 years ago
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