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3 years ago

Which is the correct Lewis dot structure of NH2? A. A B. B C. C D. D E. E

Chemistry

2 answers:

AleksAgata [21]3 years ago

8 0

Answer:

Explanation:

Serggg [28]3 years ago

5 0

Answer:

please I think the answer is A.

please show appreciation if it helps

and sorry if it doesn't help.

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kiruha [24]

Answer:

23.5 degrees

Explanation:

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Water vapor particles are most likely to phase change into liquid particles if the vapor particles come into contact with

dalvyx [7]

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3 years ago

Look at the two question marks between zinc (zn) and arsenic (as). at the time, no elements were known with atomic weights betwe

Thepotemich [5.8K]

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1 year ago

What is the molality, m, of an aqueous solution of ammonia that is 12.83 M NH3 (17.03 g/mol)? This solution has a density of 0.9

daser333 [38]

Answer:

Molality = 18.5 m

Explanation:

Let's analyse data. We want to determine molality which means mol of solute / 1kg of solvent. (Hence we need, the moles of solute and the mass of solvent in kg)

12.83 M means molarity → mol of solute in 1L of solution

Density refers always to solution → Mass of solution / Volume of solution

1L = 1000 mL

We can determine the mass of solution with density

0.9102 g/mL = Mass of solution / 1000 mL

Mass of solution = 0.9102 g/mL . 1000 mL → 910.2 g

Let's convert the moles of solute (NH₃) to mass

12.83 mol . 17.03 g/ 1 mol = 218.5 g

We can apply this knowledge:

Mass of solution = Mass of solvent + Mass of solute

910.2 g = Mass of solvent + 218.5 g

910.2 g - 218.5 g = 691.7 g → Mass of solvent.

Let's convert the mass in g to kg

691.7 g . 1kg / 1000 g = 0.6917kg

We can determine molalilty now → 12.83 mol / 0.6917kg

Molality = 18.5 m

6 0

3 years ago