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HACTEHA [7]
3 years ago
13

Fine the mole. 2.41 x 10^24 molecules CO2

Chemistry
1 answer:
vlada-n [284]3 years ago
5 0

Answer:

<h2>4 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{2.41 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\  = 4.00322...

We have the final answer as

<h3>4 moles</h3>

Hope this helps you

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How many grams of mgo are produced during an enthalpy change of -231 kj ?
SCORPION-xisa [38]

The reaction for the formation of MgO(s):

2 Mg (s) + O2(g) -à 2MgO(s)                     ΔH = -601.24 kJ/mol

<span>The enthalpy information is taken from: http://webbook.nist.gov/cgi/inchi?ID=C1309484&Mask=2</span>

From the equation and with an enthalpy change of -231 kJ:

-231 kJ * 2 mol Mg * (1/-601.24 kJ/mol) = 0.76841 mol Mg

Then, with the molar mass of MgO = 40.3,

0.76841 mol Mg *(2 mol MgO/2 mol Mg)* 40.3 g/mol MgO = <span>30.967 g MgO</span>

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3 years ago
The table shows the average number of pounds of trash generated per person per day in the United States from 1970 to 2010. Use t
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3 years ago
what do the colors produced by fireworks indicate? a. a physical change c. a state change b. a chemical change d. an element cha
Nat2105 [25]
B. A chemical change 
6 0
3 years ago
What type of reaction is displayed below?
mr Goodwill [35]

Answer:

double replacement

Explanation:

The reaction shown is a double replacement reaction.

It is also known as double decomposition or metathesis reaction.

In such a reaction, there is an actual exchange of partners to form new compounds.

One of the following is the driving force for such reaction:

  • formation of an insoluble compound or precipitate
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3 0
3 years ago
2.56 g of hydrogen reacts completely with 20.32 g of oxygen<br> to form X g of water. X = g
Brilliant_brown [7]

Answer:

Mass of water produced is 22.86 g.

Explanation:

Given data:

Mass of hydrogen = 2.56 g

Mass of oxygen = 20.32 g

Mass of water = ?

Solution:

Chemical equation:

2H₂ + O₂   →  2H₂O

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 20.32 g/ 32 g/mol

Number of moles = 0.635 mol

Number of moles of hydrogen:

Number of moles = mass/ molar mass

Number of moles = 2.56 g/ 2 g/mol

Number of moles = 1.28 mol

Now we will compare the moles of water with oxygen and hydrogen.

                    O₂            :            H₂O

                     1              :             2

                  0.635        ;            2×0.635 =  1.27

                   H₂             :              H₂O

                    2              :              2

                 1.28            :           1.28

The number of  moles of water produced by oxygen are less thus it will be limiting reactant.

Mass of water produced:

Mass = number of moles × molar mass

Mass = 1.27 × 18 g/mol

Mass = 22.86 g

 

4 0
3 years ago
Read 2 more answers
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