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attashe74 [19]
3 years ago
5

Which information about an atom can a period number give you?(1 point)

Chemistry
2 answers:
earnstyle [38]3 years ago
6 0
B how many energy levels it has. Period number is based on how many shells/energy level the atom had.

for A and C and D it will be determined by group number and not period number
babunello [35]3 years ago
5 0

Answer:

A

Explanation:

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Ammonia can be produced in the laboratory by heating ammonium chloride
AnnyKZ [126]

Answer:

Mass = 2.89 g

Explanation:

Given data:

Mass of NH₄Cl = 8.939 g

Mass of Ca(OH)₂ = 7.48 g

Mass of ammonia produced = ?

Solution:

2NH₄Cl   +  Ca(OH)₂     →    CaCl₂ + 2NH₃ + 2H₂O

Number of moles of NH₄Cl:

Number of moles = mass/molar mass

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Number of moles of Ca(OH)₂ :

Number of moles = mass/molar mass

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Number of moles = 0.10 mol

Now we will compare the moles of ammonia with both reactant.

                      NH₄Cl          :          NH₃

                          2              :           2

                         0.17          :          0.17

                   Ca(OH)₂         :          NH₃

                        1                :           2

                    0.10              :          2/1×0.10 = 0.2 mol

Less number of moles of ammonia are produced by ammonium chloride it will act as limiting reactant.

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.17 mol × 17 g/mol

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Explanation:

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Explanation:

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