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9966 [12]
3 years ago
12

Can someone list these in correct order? from least brigehst to brightest?​

Chemistry
1 answer:
Setler79 [48]3 years ago
8 0
Polaris -least brightest
Pluto
Venus
Moon
Sun - most brightest
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Two methanol-water mixtures are contained in separate tanks. The first mixture contains 40.0 wt% methanol and the second contain
RoseWind [281]

Answer:

M_{per}= 52.86

W_{per}=47.14

Explanation:

<u>First mixture</u>:

40 wt% methanol - 60 wt% water 200 kg

m_{met1}=200 kg * 0.4= 80 kg

m_{wat1}=200 kg * 0.6= 120 kg

<u>Second mixture</u>:

70 wt% methanol - 30 wt% water 150 kg

m_{met2}=150 kg * 0.7= 105 kg

m_{wat2}=150 kg * 0.3= 45 kg

Final mixture:

m_{metF=80 kg + 105 kg= 185 kg

m_{watF}=120 kg + 45 = 165 kg

M_{per}=\frac{185 kg}{185 kg + 165 kg}*100= 52.86

W_{per}=\frac{165 kg}{185 kg + 165 kg}*100=47.14

If, the compositions are constant, the only variables are the mass of each mixture used in the final one, so there can be only one independent balance.

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3 years ago
The chemical formula for beryllium oxide is BeO.A chemist determined by measurements that 0.045 moles of beryllium participated
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Answer: 0.405g

Explanation:

Molar Mass of Be = 9g/mol

Number of mole of Be = 0.045mol

Mass conc. Of Be = 0.045 x 9 = 0.405g

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Why is the use of high-frequency radio waves a beneficial technological advancement
Lynna [10]

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I think It's C

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due to higher waves can get easy transfers and receive those signals for most things, such as radios, TVs, phone signals etc etc

4 0
2 years ago
Change for a liquid state to a solid state is known as what phase change?
NeTakaya

Answer:

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How many mol of phosphorus are obtained if 74.85 mol of carbon is used​
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Answer:

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Explanation:

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