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mixas84 [53]
3 years ago
6

What are the elements of PCl5 and the name

Chemistry
1 answer:
prisoha [69]3 years ago
8 0
Phosphorus, Chlorine. The IUPAC name is Phosphorus pentachloride

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Which colligative property is employed when salt is put on an icy sidewalk to melt ice?
ankoles [38]
<span>The correct answer is 'freezing point depression'. Colligative properties depend on the concentration of molecules of a solute. Examples of other colligative properties are boiling point elevation or vapour pressure lowering. The salt causes ice on the side walk to melt because it lowers the freezing point. </span>
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3 years ago
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The equilibrium constant K changes with changes in<br>the temperature.​
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<h3>Answer:</h3><h2>Equilibrium constants are changed if you change the temperature of the system. Kc or Kp are constant at constant temperature, but they vary as the temperature changes. You can see that as the temperature increases, the value of Kp falls.</h2>

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2 years ago
Which of the following definitions describes a chemical hazard?
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3 years ago
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Cu20(s) + C(s) - 2Cu(s) + CO(g)
Romashka-Z-Leto [24]

Answer:

That means Cu2O is limiting reagent and C is excess reagent

Explanation:

Based on the reaction, 1 mole of Cu2O reacts per mole of C. The ratio of reaction is 1:1.

To solve this question we need to convert the mass of each reactant to moles. The reactant with the lower amount of moles is limiting reactant and the excess reactant is the reactant with the higher number of moles.

<em>Moles Cu2O -Molar mass: 143.09 g/mol-</em>

114.2g Cu2O * (1mol / 143.09g) = 0.798 moles Cu2O

<em>Moles C -Molar mass: 12.01g/mol-</em>

11.1g C * (1mol / 12.01g) = 0.924 moles C

<h3>That means Cu2O is limiting reagent and C is excess reagent</h3>

<em> </em>

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6 0
3 years ago
You travel 3 miles in a sleigh at 5 mi/h. How long in minutes were you traveling in the sleigh?
brilliants [131]

To work out the time taken to travel a certain distance a ta certain speed, we divide the distance by the speed.


So, 3/5 = 0.6 hours. To convert this to minutes, we need to work out 0.6 of 60. We can do this by simply multiplying 0.6 by 60, to get 36 minutes.



Hope I helped! xx


5 0
3 years ago
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