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nevsk [136]
3 years ago
6

I attached my homework sheet, and can't figure it out. If anyone could help it would be great.

Chemistry
1 answer:
Lynna [10]3 years ago
7 0

Answer:

I can't see the picture can you just text it to me so I can help you

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for the following reaction: 1 CuO + 1 H2 --> 1 Cu +1H2O, what is the quantity of moles of H2O when there are 240 grams of CuO
Ber [7]

Considering the reaction stoichiometry, the quantity of moles of H₂O produced is 3.02 moles.

The balanced reaction is:

CuO + H₂ → Cu + H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:  

  • CuO= 1 mole
  • H₂= 1 mole
  • Cu= 1 mole
  • H₂O= 1 mole

The molar mass of the compounds present in the reaction is:

  • CuO= 79.55 g/mole
  • H₂= 2 g/mole
  • Cu= 63.55 g/mole
  • H₂O: 18 g/mole

Then, by reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of mass of each compound participate in the reaction:  

  • CuO= 1 mole× 79.55 g/mole= 79.55 grams
  • H₂= 1 mole× 2 g/mole= 2 grams
  • Cu= 1 mole× 63.55 g/mole= 63.55 grams
  • H₂O: 1 mole× 18 g/mole= 18 grams

Then, it is possible to determine the moles of H₂O necessary by the following rule of three:  If by reaction stoichiometry 79.55 grams of CuO produces 1 mole of H₂O, 240 grams of CuO produces how many moles of H₂O?

molesofH_{2} O=\frac{240 grams of CuOx 1 mole ofH_{2} O }{79.55 grams of CuO}

<u><em>moles of H₂O= 3.02 moles</em></u>

Finally, the quantity of moles of H₂O produced is 3.02 moles.

Learn more:

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6 0
3 years ago
If n=7 and l=6, What are the values of l?​
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3 years ago
Use your periodic table of elements. Take any element from the first column, except for hydrogen and lithium, and answer the fol
HACTEHA [7]

Sodium has has 11 protons, 11 electrons and 12 neutrons.

<h3>What is the periodic table?</h3>

The periodic table shows the elements as they are arranged in increasing atomic number. The elements on the left hand side of the table are metals. Those on the right hand side of the table are mostly nonmetals.

A element in the first column is sodium;

The element Na is called sodium and it belongs to group 1 elements. It has 11 protons, 11 electrons and 12 neutrons.

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4 0
2 years ago
Write the steps for an IONIC BOND for KCI.​
Vlad [161]

Answer:

Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.

Explanation:

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A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these me
Tomtit [17]

Answer:

B). Precision.

Explanation:

During the course of measurements, two important factors are been seen to play key part which are accuracy and also precision. Precision here can reflect to the closeness of an answer towards the main value even though accuracy can show that too. Also it can show series of values been reproduced in the measurement flow; though in some cases can be a bit far from the actual value. Also its values are swen to be different because of repeatition and alsio in some cases, observational errors too.

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3 years ago
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