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kupik [55]
3 years ago
5

The atomic number and the mass number of 18 and 40. Write the information conveyed by this statement.​

Chemistry
1 answer:
VashaNatasha [74]3 years ago
8 0
There are 18 protons and electrons and 22 neutrons in the atom
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A sample of 0.0860 g of sodium chloride is added to 30.0 mL of 0.050 M silver nitrate, resulting in the formation of a precipita
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Answer:

0.21 g

Explanation:

The equation of the reaction is;

NaCl(aq) + AgNO3(aq) -----> NaNO3(aq) + AgCl(s)

Number of moles of NaCl= 0.0860 g /58.5 g/mol = 0.00147 moles

Number of moles of AgNO3 = 30/1000 L × 0.050 M = 0.0015 moles

Since the reaction is 1:1, NaCl is the limiting reactant.

1 mole of NaCl yields 1 mole of AgCl

0.00147 moles of NaCl yields 0.00147 moles of AgCl

Mass of precipitate formed = 0.00147 moles of AgCl × 143.32 g/mol

= 0.21 g

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If a bonding pair of electrons is unequally shared between two atoms, the bond is
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Answer:

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Explanation:

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