3 years ago

Calculate the number of molecules in 6.4g of Sulphur (iv) oxide

Chemistry

1 answer:

Cerrena [4.2K]3 years ago

3 0

Answer:

N= mass/molar mass

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A sample of hexane (C6H14) has a mass of 0.580 g. The sample is burned in a bomb calorimeter that has a mass of 1.900 kg and a s

s344n2d4d5 [400]

We first calculate the heat released:
Specific heat = 3.21 kJ/kgK
Heat released = heat absorbed by calorimeter
Heat absorbed = mcΔT
= 1.9 x 3.21 x 4.542
= 27.7 kJ

Now, we calculate the moles of hexane present:
Moles = mass / Mr
moles = 0.58 / (12 x 6 + 14)
= 0.0067

Heat of combustion = 27.7 / 0.0067 kJ/mol

ΔH(combustion) = 4,134.3 kJ / mol

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3 years ago

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Is soidum bicarbonate and silver nitrate reacting a chemical or physical change?

Tanzania [10]

<span>
sodium bicarbonate and silver nitrate reacting is a chemical change</span>

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4 years ago

How can you tell the difference between an ionic compound and a molecule?

slamgirl [31]

Explanation:

An ionic compound is defined as the compound formed by transfer of electrons from one atom to another.

For example, lithium atom on donating its one valence electron to chlorine atom will result in the formation of an ionic bond and the compound formed is LiCl.