Feso3 compound name
Iron(II) Sulfite FeSO3 Molecular Weight
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Answer:
7836.6 J
Explanation:
The following data were obtained from the question:
Heat of fusion (Hf) = 0.148 KJ/g
Mass (m) = 52.95 g
Heat (Q) required =..?
The heat (Q) required to melt the sample of nephthalene can be obtained as follow:
Q = m·Hf
Q = 52.95 × 0.148
Q = 7.8366 KJ
Finally, we shall convert 7.8366 KJ to Joule (J) in order to obtain the desired result. This can be obtained as follow:
1 kJ = 1000 J
Therefore,
7.8366 KJ = 7.8366 KJ × 1000 J / 1 KJ
7.8366 KJ = 7836.6 J
Therefore, 7.8366 KJ is equivalent to 7836.6 J
Thus, 7836.6 J of heat energy is required to melt the sample of nephthalene.
The ozone layer acts as an invisible shield and protects us from harmful ultraviolet (UV) radiation from the sun. In particular, the ozone layer protects us from the UV radiation, known as UV-B, which causes sunburn.
Ozone is a colorless, odorless reactive gas comprised of three oxygen atoms.
Answer:
C₅H₁₂.
Explanation:
- The hydrocarbon is burned in excess of oxygen to give CO₂ and H₂O.
- <em>The no. of moles of CO₂ produced = mass/molar mass </em>= 1.53 g/44.0 g/mol = <em>0.03477 mol.</em>
<em>Which is corresponding to 0.03477 mol of C.</em>
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- <em>The no. of moles of H₂O produced = mass/molar mass</em> = 0.756 g/18.0 g/mol = <em>0.042 mol.</em>
<em>which corresponds to (0.042 x 2) = 0.084 moles of hydrogen.</em>
<em />
- The ratio of the number of moles of hydrogen to carbon in the composition of the compound will be 0.084 / 0.03477 = 2.4 = 12/5.
- <em>Therefore, the empirical formula of the compound under consideration is C₅H₁₂.</em>
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