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saveliy_v [14]
3 years ago
5

Frayer model for matter

Chemistry
1 answer:
givi [52]3 years ago
6 0
A model showing that gases are made from the matter of particles that are too small to see and are moving freely around in space can explain many observations.
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A person tries to heat up her bath water by adding 5.0 L of water at 80°C to 60 L of water at 30°C. What is the final temperatur
Ratling [72]

Answer:T_f=33.85\°C

Explanation:

Hello,

In this case, we can write the following relationship, explaining that the lost by the hot water is gained by the cold water:

Q_{hot,W}=-Q_{cold,W}

Which in terms of mass, specific heat and temperatures, we have:

m_{hot,W}Cp_{W}(T_f-T_{hot,W})=-m_{cold,W}Cp_{W}(T_f-T_{cold,W})

Whereas the specific heat of water is cancelled out to obtain the following temperature, considering that the density of water is 1 kg/L:

T_f=\frac{m_{hot,W}T_{hot,W}+m_{cold,W}T_{cold,W}}{m_{hot,W}+m_{cold,W}}\\\\T_f=\frac{5.0kg*80\°C+60kg*30\°C}{5.0kg+60kg} \\\\T_f=33.85\°C

Regards.

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3 years ago
Question 39 (1 point)
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volume = 2128L

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volume at stp = 22.4dm³ =22400L

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volume = 0.095 x 22400

volume = 2128L

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It follows a clearly laid out method.

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How many electrons does silver have to give up in order to achieve a pseudo-noble-gas electron configuration? 2 4 3 1?
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Silver has to give up one electron in order to achieve a pseudo-noble gas electronic configuration.<span />
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