Polar molecules have an equal number of positive and negative particles. True or false
2 answers:
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Answer:
76.875 cm3
<h2>Explanation:</h2>Since: Density =
Then: Volume =
The mass of the box = 246g
and the density = 3.2 g/cm3
Then: The volume =
= 76.875 cm3
<u>Answer:</u> The moles of water produced are 1.54 moles.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of ethane = 15.42 g
Molar mass of ethane = 30.07 g/mol
Putting values in above equation, we get:
The chemical equation for the combustion of ethane follows:
By Stoichiometry of the reaction:
2 moles of ethane produces 6 moles of water
So, 0.513 moles of ethane will produce = of water
Hence, the moles of water produced are 1.54 moles.