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lesya692 [45]
3 years ago
15

some constellations, such ad Ursa Minor, are visible in the sky year-round; other contellations appear for only part of the year

. explain why this happens.
Chemistry
1 answer:
worty [1.4K]3 years ago
5 0
While most constellations are only visible to us in different seasons, some are always there 24/7/365 because they are positioned close to the Polar Axis, or the Polaris.
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There are two common oxides of copper; one is 80% copper and the other is 89% copper by weight. Calculate the formula and name e
irakobra [83]

80% copper (Cu)

Cu: 80 :  63.546 = 1.259

O: 20 : 16 = 1.25

Cu:O = 1 : 1

the formula: CuO

89% copper (Cu)

Cu: 89 :  63.546 = 1.4

O: 11 : 16 = 0.6875

Cu:O = 2:1

the formula: Cu₂O

8 0
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Some chemicals which are used to control weeds may be harmful to the environment.<br> TrueFalse
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Free_Kalibri [48]
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4 0
2 years ago
What is the mass of 8.0 x 10^26 UF6 molecules?
gulaghasi [49]
First, find the number of moles of UF6
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Number of moles = 8.0 x 10^26 / Avagadro's number = 8.0 x 10^26 / 6.023 x 10^23 = 1.328 x 10³ moles

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3 0
2 years ago
Compounds have two or more atoms and the atoms can be the same element<br> true or false
mel-nik [20]

Answer:

i think its false because

Explanation:

compounds are made of two or more atoms of <u>different</u> elements

4 0
2 years ago
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