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Alexandra [31]
3 years ago
5

All the elements in the same period have the same_______

Chemistry
1 answer:
gogolik [260]3 years ago
8 0

Answer:

all the elements in the same period have the same valence electrons.

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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
Soil is divided into different layers. There is topsoil and, below it, there is _______.
uranmaximum [27]

Answer:

Soil Horizons (layers): Soil is made up of distinct horizontal layers; these layers are called horizons. They range from rich, organic upper layers (humus and topsoil) to underlying rocky layers ( subsoil, regolith and bedrock).

Explanation:

4 0
3 years ago
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Compared to other minerals, a mineral that is ranked higher on the moh’s scale will be:
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The choices here are: 
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6 0
3 years ago
What is chemical reactions
Bogdan [553]
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a reaction that is caused by chemicals 
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3 years ago
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