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3 years ago

How many moles of carbon dioxide are produced from 8.73 moles of tristearin?

Chemistry

1 answer:

matrenka [14]3 years ago

8 0

Answer:

Explanation:

8.73 mol x mol

2 C57H110O6(S) + 163 O2(g) ---> 114 CO2(g) + 110 H2O(I)

2 mol 114 mol

8.78 mol (114mol/2 mol) =500.46 mol

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A solution contains an unknown mass of dissolved barium ions. When sodium sulfate is added to the solution, a white precipitate

AVprozaik [17]

Answer:

0.1388 g

Explanation:

The mass of $BaSO_4$ obtained on precipitation = 236 mg

1 mg = 0.001 g

Thus, Mass of $BaSO_4$ = 0.236 g

Molar mass of $BaSO_4$ = 233.43 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{0.236\ g}{233.43\ g/mol}$

Moles of $BaSO_4$ = 0.001011 moles

According to the reaction,

$Ba^{2+}+SO_4{2-}\rightarrow BaSO_4$

Thus, moles of barium = 0.001011 moles

Molar mass of barium = 137.327 g/mol

Thus, Mass = Moles * Molar mass = 0.001011*137.327 g = 0.1388 g

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4 years ago

List two processes from which it may be concluded that the particles of a gas move continuously.

ziro4ka [17]

Answer:

The two processes maybe:

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3 years ago

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3 years ago

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2 years ago

Which of these statements is not true about chemical reaction rates? a Temperature can change a reaction rate. b The amount of r

Umnica [9.8K]

Answer:

The statement that is not true is: 'Temperature does not affect the reaction rate'.

Explanation:

a) Temperature can change a reaction rate. This is true

Increasing the temperature increases the reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.

For example, the time taken to melt a metal will be much higher at a lower temperature but it will decrease as soon as we increase the temperature

b) The amount of reactants can increase the reaction rate. This is true

A higher concentration of reactants leads to more effective collisions per unit time, which leads to an increased reaction rate.

c) Temperature can decrease the reaction rate. This is true

Decreasing the temperature decreases the reaction rates because of the decrease in the number of high energy collisions. It will result in a slower reaction.

d) Temperature does not affect the reaction rate. This is not true.

The reaction rate is temperature dependent. The reaction rate increases with higher temperature and decreases with lower temperature.

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3 years ago

How many moles of carbon dioxide are produced from 8.73 moles of tristearin?​

How many moles of carbon dioxide are produced from 8.73 moles of tristearin?