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attashe74 [19]
3 years ago
6

TIMED HELP ASAP

Chemistry
1 answer:
anastassius [24]3 years ago
7 0

Answer:

TIMED HELP ASAP

19.11 g of MgSO₄ is placed into 100.0 mL of water. The water's temperature increases by 6.70°C. Calculate ∆H, in kJ/mol, for the dissolution of MgSO₄. (The specific heat of water is 4.184 J/g・°C and the density of the water is 1.00 g/mL). You can assume that the specific heat of the solution is the same as that of water.

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How many moles are present in 25.0 grams of potassium permanganate
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What material is least likely to be recognized as a mixture by looking under a microscope
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8 0
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If a non-cyclic alkane shows a molecular ion peak at m/z 3.80 × 102, what is the chemical formula?
soldier1979 [14.2K]
The General Equation of Alkane is as follow,

                                              CnH₂n₊₂          ------- (1)
As m/z = 380
So,
                                              CnH₂n₊₂  =  380
Or,
                                              12n+ 1₂n₊₂  =  380

                                              12n+ ₂n ₊ ₂  =  380

                                              14n ₊ ₂  =  380

                                                   14n  =  380 - 2

                                                   14n  =  378

                                                       n  =  378 / 14

                                                       n  =  27
Now, putting value of n in eq. 1

                                              C₂₇H₍₂₇ₓ₂₎₊₂

                                                  C₂₇H₅₆
Result:
           n  =  C  =  27

           y  =  H  =  56
4 0
4 years ago
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