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Savatey [412]
2 years ago
13

Help me pls I will mark you as brain

Chemistry
1 answer:
stealth61 [152]2 years ago
7 0
I’m pretty sure it’s the first one
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B. Sodium

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What is the average kinetic energy of 1 mole of gas at 102 degree celsius
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When a hydrogen atom covalently bonds to another atom, how many electrons associated with this hydrogen atom become involved in
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When a solute is dissolved in water, the solution's boiling temperature _______ and the freezing temperature _______?
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Nitella [24]

\quad \huge \quad \quad \boxed{ \tt \:Answer }

\qquad \tt \rightarrow \:mass = 11.42 \:\: grams

____________________________________

\large \tt Solution  \: :

\qquad \tt \rightarrow \: Q = ms\Delta T

  • \textsf{Q = heat evolved/absorbed = 501 J}

  • \textsf{m = mass in gram = ?}

  • \textsf{s = specific heat = 0.45}

  • \textsf{ΔT = change in temp = 120 - 22.5 =97.5°C}

\large\textsf{Find m : }

\qquad \tt \rightarrow \: 501 = m \sdot(0.45) \sdot(97.5)

\qquad \tt \rightarrow \:  501 = m \sdot43.875

\qquad \tt \rightarrow \: m =  \dfrac{501}{43.875}

\qquad \tt \rightarrow \: m  \approx11.42 \:  \: g

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

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