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Romashka [77]
3 years ago
14

This question is very hard and I'm having trouble with it​

Chemistry
1 answer:
Nezavi [6.7K]3 years ago
7 0
What question would that be ?
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4. Again, have someone hold the mirror for you, slowly move at least 3 m away
faltersainse [42]
Closer is bigger................
8 0
3 years ago
3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4 H2O
Ksivusya [100]

Considering the reaction stoichiometry, the amount of moles of NO that is produced when 27 moles of HNO₃ react is 6.75 moles.

<h3 /><h3>Reaction stoichiometry</h3>

The balanced reaction is:

3 Cu + 8 HNO₃ → 3 Cu(NO₃)₂ + 2 NO + 4 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:  

  • Cu: 3 moles
  • HNO₃: 8 moles
  • Cu(NO₃)₂: 3 moles
  • NO: 2 moles
  • H₂O: 4 moles

<h3>Amount of moles of NO produced</h3>

It is possible to determine the the amount of moles of NO produced by a rule of three: if by stoichiometry 8 moles of HNO₃ produce 2 moles of NO, if 27 moles of HNO₃ react how many moles of NO will be formed?

amount of moles of NO=\frac{27 moles of HNO_{3} x 2 moles of NO}{8 moles of HNO_{3}}

<u><em>amount of moles of NO= 6.75 moles</em></u>

In summary, the amount of moles of NO that is produced when 27 moles of HNO₃ react is 6.75 moles.

Learn more about reaction stoichiometry:

<u>brainly.com/question/11999193</u>

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4 0
3 years ago
The ions Cr3+ and O2- combine to form the ionic compound chromium oxide. In what proportions do these ions combine to produce a
Anit [1.1K]
To find the ratio of the the combination for the ion, write the charge of the cation as the subscript for the anion, and the charge of the anion as the subscript of the cation. This will make the charges effectively cancel and you will be left with a neutral ionic compound. Remember, that an ionic compound is made up of a metal and a nonmetal.
For Cr3+ and O2-, you will get the neutral compound to be Cr₂O₃.

The proportion these ions combine in is 2 to 3. 2 ions of Cr3+ and 3 ions of O2-

Your answer is D) 2:3
6 0
4 years ago
Read 2 more answers
Sodium chloride, NaCl forms in this reaction between sodium and chlorine. 2Na(s) + Cl2(g) → 2NaCl(s) How many moles of NaCl resu
choli [55]

Answer: 7.8 moles of NaCl result from the complete reaction of 3.9 mol of Cl_2

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}    

\text{Moles of} Cl_2=3.9mol

2Na(s)+Cl_2(g)\rightarrow 2NaCl(s)

As Na is the excess reagent, Cl_2 is the limiting reagent as it limits the formation of product.

According to stoichiometry :

1 mole of Cl_2 gives = 2 moles of NaCl

Thus 3.9 moles of Cl_2 will give=\frac{2}1}\times 3.9=7.8moles  of NaCl

7.8 moles of NaCl result from the complete reaction of 3.9 mol of Cl_2

5 0
3 years ago
Why do scientists look for patterns in the world​
Margarita [4]

Answer:

to do day-to day activities easily and make surrounding comfortable for man

Explanation:

as an example , binary numbers help to work computers ,calculators.they help us lot .

scientific methods also need to write large and small numbers in short ways .so, scientists find various patterns .

6 0
3 years ago
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