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ivann1987 [24]
3 years ago
11

Kích thước của nguyên tử gần nhất với

Chemistry
1 answer:
trapecia [35]3 years ago
4 0

Answer:

The size of the atom closest to 30 to 300 pm

Explanation:

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Define all of the different changes of state and what the states they change to and form
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3 years ago
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How many grams of NaCl are required to make 150.0mL of a 5.000 m solution
Yanka [14]

The  number of  grams of NaCl  required  to make 150.0 ml of a 5.000m solution  is  43.875  grams


<u><em>calculation</em></u>

Step 1:  calculate  moles of NaCl

moles=  molarity x  volume in liters

volume in liters =  150.0  ml/1000= 0.15  l

moles is=  5.000mol/l  x0.15  l  =0.75  moles


Step2 :  find  mass

mass=  moles  x molar  mass

molar mass  of NaCl= 23 +35.5 = 58.5  g/mol

mass= 0.75  moles x58.5 g/mol = 43.875 grams

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4 years ago
Which of the following would most likely contain a fossil?
Murljashka [212]
The correct answer would be limestone
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What is an energy level and what particle occupies it
Snezhnost [94]

Hey there!

An energy level is the level of energy that the particle has.

Electrons occupy energy levels.

To release electromagnetic radiation, an electron will absorb energy, jump up an energy level, then releases the energy in the form of a photon and goes back down to its original energy level.

Hope this helps!

4 0
3 years ago
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