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Ede4ka [16]
2 years ago
15

How many neutrons in the following elements below

Chemistry
1 answer:
Wittaler [7]2 years ago
8 0

Answer:

its atomic number is 92 and its atomic mass is 238(92+146).

Explanation:

For example,Silicon has 14 protons and 14 neutrons.its atomic number is 14 and its atomic mass is 28

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8 0
3 years ago
2Na3N3 -&gt; 2Na + 3N2<br><br> if 0.58 mol if NaN3 reacts, what mass of nitrogen would result
Ronch [10]

Answer:

                      Mass = 24.36 g of N₂

Explanation:

                   The balance chemical equation for the decomposition of NaNO₃ is as follow;

                                           2 NaN₃ → 2 Na + 3 N₂

Step 1: Find moles of N₂ as;

According to equation,

                 2 moles of NaNO₃ produces  =  3 moles of N₂

So,

              0.58 moles of NaNO₃ will produce  =  X moles of N₂

Solving for X,

                      X = 3 mol × 0.58 mol / 2 mol

                      X = 0.87 mol of N₂

Step 2: Calculate mass of N₂ as,

Mass = Moles × M.Mass

Mass = 0.87 mol × 28.01 g/mol

Mass = 24.36 g of N₂

8 0
3 years ago
Indigenous rocks form by the cooling and hardening of melted rock.* True False​
salantis [7]

Answer: True

Explanation: They are formed by the cooling and hardening of molten magma

3 0
3 years ago
True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.
nikklg [1K]
True.
moles x avagadro number = molecules
8 0
3 years ago
Read 2 more answers
A diesel truck produces 47.5kJ of useful output energy from 125kJ of diesel fuel.what is the truck efficiency?.show the solution
Alex Ar [27]
You have to do a report :
\frac{E_f}{E_i} =  \frac{47,5}{125} = 0,38

So the truck efficiency is 38%.
7 0
3 years ago
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