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Elodia [21]
3 years ago
6

the compound sodium sulfide consists of a ratio of two sodium ions (Na+) to one sulfide ion (Sa-). write the chemical formula fo

r this compound
Chemistry
1 answer:
Brut [27]3 years ago
3 0

Answer:

Na₂S

Explanation:

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Sound _____.
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Answer:

Sounds travels in transverse waves requires a medium to travel through

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Which of these is a TRUE statement? A) Sound travels through gases easier than liquids. B) Sound travels through solids easier t
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Sound travels through gases faster than it travels through liquids

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50 POINTS! ANSWER FAST!
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<u>Given:</u>

The initial energy of the electron Einitial = 16.32 * 10⁻¹⁹ J

The energy released i.e the change in energy ΔE = 5.4 * 10⁻¹⁹ J

<u>To determine:</u>

The final energy state Efinal of the electron

<u>Explanation:</u>

Since energy is being released, this suggests that Efinal < Einitial

i.e. ΔE = Einitial - Efinal

Efinal = Einitial - ΔE = (16.32 - 5.4)*10⁻¹⁹ = 10.92 * 10⁻¹⁹ J

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The electron moved down to an energy level and has an energy of 10.92 * 10⁻¹⁹ J

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The burning of a sample of propane
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Answer:

70.0°C

Explanation:

We are given;

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  • Mass of water is 500 g
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We are required to determine the final temperature of water;

Taking the initial temperature is x°C

We know that the specific heat of water is 4.18 J/g°C

Quantity of heat = Mass × specific heat × change in temperature

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Therefore;

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Thus, the final temperature of water is 70.0°C

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