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bekas [8.4K]
2 years ago
6

Which of the following is an oxidation? Select all that apply

Chemistry
1 answer:
butalik [34]2 years ago
7 0

Answer:

2Na=Ca(OH)000.1 AgBr=2KF 2KBr=LiNO

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The molar mass of Ba(OH)2 is<br> (1) 154.3 g (3) 171.3 g<br> (2) 155.3 g (4) 308.6 g
Archy [21]
Ba(OH)₂ = 137.3 + 16 x 2 + 1 x 2 = 171.3 g

Answer (3)

hope this helps!

8 0
3 years ago
A typical aspirin tablet contains 500. mg of c9h8o4. how many moles of c9h8o4 molecules and how many molecules of acetylsalicyli
joja [24]
From the periodic table:
molar mass of carbon = 12 gm
molar mass of hydrogen = 1 gm
molar mass of oxygen = 16 gm

molar mass of <span>acetylsalicylic acid = 9(12) + 8(1) + 4(16) = 180 gm

Number of moles = mass / molar mass = 0.5 / 180 = 2.778 x 10^-3 moles

To get the number of molecules, we multiply the number of moles by Avogadro's number as follows:
number of molecules = </span>2.778x10^-3x6.02x10^23 =1.672 x 10^21 molecules
6 0
3 years ago
All molecules are always made of
Andreas93 [3]

Answer:

Atoms and matter

Explanation:

atoms are the building blocks and matter is everything

5 0
3 years ago
Read 2 more answers
What does an algae cell, tree,mushroom, and animal have in common
wel
Each one is a living organism.
5 0
3 years ago
Which of these is an indication that a chemical reaction has occurred?
Kobotan [32]

<u><em>Answer:</em></u>

  • The correct option is C.
  • Formation of a precipitate

<u><em>Explanation:</em></u>

During a chemical reaction, new substances are formed known as a products, mostly reaction occur and their product is obtained as precipitates.

<u><em>Example</em></u>

Arylidene-2-thiobarbituric acid is obtained as precipitates when aldehyde and thiobarbituric acid react to each other.

melting of a substance

It is just indication of physical changes, like melting of ice, composition remained same as before.

boiling of a substance

It is just indication of physical changes, like boiling of water into vapors, composition remained same as before.

freezing of a substance

It is just indication of physical changes, like freezing of water into ice, composition remained same as before

7 0
2 years ago
Read 2 more answers
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