Question

list the items of food available to the harappans cities. identify the groups who would provided these ​

Answer 1

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Answer 2

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student-name Riya Vardhan asked in Science

A vessel contains equal masses of hydrogen, helium and methane. Find out the fractions of the partial pressures of the mixture.

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student-name Raveena Sharma answered this

1684 helpful votes in Science, Class VIII

1. Let the mass of all three gases be m.

Number of moles of H2 = given massmolar mass=m2

Number of moles of He = m4

Number of moles of CH​4 = m16

2. Mole fractions:

Total moles = m2+m4+m16=13m16χH2 = m213m16=813χHe = m413m16=413χCH4 =m1613m16=113

3. Partial pressure:

pH2 = χH2 ×P = 8p13pHe =4p13pCH4 = p13