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natima [27]
2 years ago
13

Twenty students were surveyed to find out how many hours of TV they watch during a school week. The results are shown to the rig

ht. Answer the following questions and round your answers to the nearest half hour. The mean of the data is ____ hours.
Chemistry
2 answers:
natulia [17]2 years ago
8 0

Answer: 4.5

Explanation:

Just did it

alexandr402 [8]2 years ago
3 0

Answer:

5 Hours

Explanation: I just wanted to save your time and i added all the hours up divided by 20 which i got 4.95 then rounded up to 5.

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How do scientists predict the polarity of molecules, the distribution of non-polar and polar molecules?
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Answer:

Explanation:

Polar molecules interact with other molecules of similar polarity to form solutions. Non-polar molecules do not interact the same way.

8 0
2 years ago
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________ function by absorbing excess hydrogen or hydroxide ions.
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<u>Buffers</u> function by absorbing excess hydrogen or hydroxide ions.

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The North Star is the last star in the Ursa Minor constellation.<br> True<br> False
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3 years ago
Iron(II) sulfide has a primitive cubic unit cell with sulfide ions at the lattice points.
masya89 [10]

We have that the  the density of FeS  is mathematically given as

  •  \phi=2.56h/cm^3

From the question we are told

Iron(II) sulfide has a primitive <em>cubic</em> unit cell with <em>sulfide</em> ions at the <em>lattice points.</em>

The ionic radii of iron(II) ions and sulfide ions are 88 pm and 184 pm, respectively.

What is the density of FeS (in g/cm3)?

<h3>Density</h3>

Generally the equation for the Velocity  is mathematically given as

V_c=a^3=(2\pi Fe^{2+}+2\pi S^{2-})^3\\\\Therefore\\\\V=a^3(2\pi*0.088+2\pi 0.184)^3\\\\V=16.98*10^{-23}\\\\Therefore\\\\\phi=n\frac{PFeion+PSion}{VNa}\\\\\phi=3*\frac{55.85+32}{16.9*10^{-23}*6.023*10^{23}}

  • \phi=2.56h/cm^3
  • \phi=2.56h/cm^3

For more information on ionic radii visit

brainly.com/question/13981855

4 0
2 years ago
How are oxidation-reduction reactions related to how you use energy?
Tems11 [23]

Answer:

In oxidation reduction reactions, one species gets reduced by taking on electron(s) and another species gets oxidized by losing electrons. They also flow by a wire

Explanation:

8 0
2 years ago
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