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Korvikt [17]
3 years ago
9

Using spdf notation, what is the electron configuration for a neutral atom of beryllium

Chemistry
1 answer:
kkurt [141]3 years ago
4 0

Answer:

Beryllium

Explanation:

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If the empirical formula of a compound is C2H5 and the Molecular mass is 87g/mol what is the molecular formula?
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C6H15, C2H5 has a molar mass of 29g/mol. 87 divided by 29 is 3. Then multiply each element subscript by 3
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A stick of butter is melted in a saucepan. As it continues to cook, the butter turns brown. What changes have occurred?
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Physical change! I believe
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Tin(II) fluoride (SnF2) is often added to toothpaste as an ingredient to prevent tooth decay. What is the mass of F in grams in
Alexeev081 [22]

Answer:

In 33.7 grams SnF2 we have 8.17 grams of F

Explanation:

Step 1: Data given

Mass of SnF2 = 33.7 grams

Molar mass of SnF2 = 156.69 g/mol

Molar mass of F = 19.00 g/mol

Step 2: Calculate moles of SnF2

Moles SnF2 = mass / molar mass

Moles SnF2 = 33.7 grams / 156.69 g/mol

Moles SnF2 = 0.215 moles

Step 3: Calculate moles F

For 1 mol SnF2 we have 2 moles F

For 0.215 moles SnF2 we have 2*0.215 = 0.430 moles F

Step 4: Calculate mass F

Mass F = moles F * molar mass F

Mass F = 0.430 moles * 19.00 g/mol

Mass F = 8.17 grams

In 33.7 grams SnF2 we have 8.17 grams of F

6 0
3 years ago
Why cant you ice skate on a lake when it is not frozen​
HACTEHA [7]

Answer:

You can't ice skate on a liquid, when it is frozen it is a solid, when it's unfrozen it is a liquid

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3 years ago
Select the correct answer from each drop-down menu.
Alika [10]

Answer:

Explanation:

There are three fundamentally known states of matter save for plasma and the Bose-Einstein condensate. These states of matter are solid, liquid and gas.

We can classify nearly all matter into these discrete categories based on certain lucid characteristics they exhibit.

  • Solids have definite shape and volume and they exhibit by the far the most remarkable internal ordering. Their molecules are attached by strong internal forces.
  • Liquids do not have a definite shape but takes the shape of the contains that hold them. They are not random and have internal cohesion among them.
  • Gases are random particles and highly varied. They move haphazardly and have no definite shape and volume.
4 0
3 years ago
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