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luda_lava [24]
3 years ago
5

Which of these would produce a soft sound A (a slow vibration) B (a big vibration) C (a fast vibration) or D (a tiny vibration)

Chemistry
1 answer:
FrozenT [24]3 years ago
8 0

Answer:

A slow vibration

Explanation:

Hard and soft refer to how much a sound vibrates. When a sound is hard the vocal cords come together and release producing a less resonant sound. In a soft sound, the vocal cords rub together creating friction and heat that results in a more resonant sound.

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3 years ago
Draw the lewis structure for bef2 in the box at the right, including lone pairs.
Kamila [148]

Answer :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and the unpaired electrons present in the molecule.

The given molecule is, BeF_2

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Total number valence electrons in BeF_2 = 2 + 2(7) = 16

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3 0
2 years ago
Cho 200 g dung dịch NaCl 0,5M tác dụng hết với 400 ml AgNO3. Sau phản ứng thu được kết tủa và dung dịch không màu
ivolga24 [154]

Answer:

Explanation:

a. NaCl+ AgNO3-----> NaNO3+ AgCl

b. Số mol của NaCl= 0,2*0,5= 0,1 (mol)

------> Số mol của kết tủa AgCl tạo thành= 0,1 mol (dựa vào phương trình hóa học)

-----> Khối lượng của kết tủa AgCl tạo thành= 0,1*143,5=14,35(g)

c. Số mol của AgNO3= số mol của NaCl= 0,1 (mol)

------> Nồng độ mol của dd AgNO3 đã tham gia phản ứng= \frac{0,1}{0,4}=0,25(M)

4 0
2 years ago
What is the compound name of Ba3N?
eimsori [14]

The compound name of Ba3N is Barium Nitrate.

<u>Explanation</u>:

  • A compound name is a combination of two or more than two elements that are bonded together giving a compound form.
  • Barium Nitrate is a combination of two elements barium and nitrate which tends to bond together forming a compound.
  • Barium nitrate is the inorganic compound with the chemical formula Ba(NO₃)₂. It is colorless, toxic, and water-soluble.
  • It is more dangerous when it is exposed to fire, there will be an explosion irritating to eye and skin. Toxic oxides of nitrogen produced in fires.
  • It has a molecular weight of 261.34 g / mol and has a molecular formula of Ba(NO₃)₂.
4 0
3 years ago
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