3 years ago

What type of friction acts on a turning wheel or tire?

Chemistry

1 answer:

sdas [7]3 years ago

6 0

Answer: you are using kinetic or "sliding" friction

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How much CaCO3 would have to be decomposed to produce 247 g of CaO

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441 g CaCO₃ would have to be decomposed to produce 247 g of CaO

<h3>Further explanation</h3>

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Decomposition of CaCO₃

CaCO₃ ⇒ CaO + CO₂

mass CaO = 247 g

mol of CaO(MW=56 g/mol) :

$\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{247}{56}\\\\mol=4.41$

From equation, mol ratio CaCO₃ : CaO = 1 : 1, so mol CaO :

$\tt \dfrac{1}{1}\times 4.41=4.41$

mass CaCO₃(MW=100 g/mol) :

$\tt mass=mol\times MW\\\\mass=4.41\times 100\\\\mass=441~g$

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2 years ago

Calculate the number of sucrose molecules in a 75.0 gram sample.

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75.0 g C12H22O11 * (1 mol C12H22O11)/(342.34g C12H22O11)=0.219 mol C12H22O11

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