3 years ago

To identify the limiting and excess reactants in a reaction.

Chemistry

1 answer:

My name is Ann [436]3 years ago

4 0

Amonia is the limiting and reactant and the excess is h20

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You have 263 mL of liquid mercury, what is the mass of mercury that you have?

Gelneren [198K]

Answer:3,550.5 g

Explanation:

Mass= density×volume

Mass= 13.5g/m.l×263ml

Mass=3,550.5 g

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3 years ago

What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine?

tensa zangetsu [6.8K]

Answer:

$Q=-76.7kJ$

Explanation:

Hello,

In this case, for such formation of sulfur hexafluoride, the standard enthalpy of formation is -1220.47 kJ/mol (data extracted from NIST database). Next, we compute the moles in 10.0 grams of sulfur hexafluoride as shown below:

$n_{SF_6}=10.0gSF_6*\frac{1molSF_6}{146.06 gSF_6}=0.0685mol$

Next, for the given energy, we compute the total heat that is liberated:

$Q=-1220.47\frac{kJ}{mol}*0.0685 mol\\\\Q=-76.7kJ$

Finally, we conclude such symbol has sense since negative heat is related with liberated heat.

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3 years ago

Is pentacosane a molecular compound?

jekas [21]

Answer:

Yes

Explanation:

A molecular compound is that one which is composed of molecules formed by atoms of two or different elements. A pentacosane is an alkaline made of unbranched chain of 25 carbons atoms. It has applications in plant metabolite. The molecular formula of pentacosane is C₂₅H₅₂

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Alenkinab [10]

Answer:

A, option is the correct answer of this question

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