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Brilliant_brown [7]
3 years ago
5

Mid-Term Exam

Chemistry
1 answer:
HACTEHA [7]3 years ago
6 0

Answer:

B. brain stem

Explanation:

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In the reaction A + B + C + D, what are the reactants?
deff fn [24]

Answer:

the question makes no sense, no products are shown therfore all are reactants.

3 0
4 years ago
Viết cấu hình electron nguyên tử các nguyên tố có số electron từ 1 đến 10
Dmitry [639]

Explanation:

Element Atomic number Electronic configuration Hydrogen 1 1 Helium 2 2 Lithium 3 2,1 Beryllium 4 2,2 Boron 5 2,3 Carbon 6 2,4 Nitrogen 7 2,5 Oxygen 8 2,6 Fluorine 9 2,7 Neon 10  2,8

 The elements of these groups are called representative elements.

5 0
3 years ago
An insoluble solid formed during a reaction is called a ________________________.
olga55 [171]
An insoluble solid formed during a reaction is called a Precipitate. 
7 0
3 years ago
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What is The atomic mass number of tin
san4es73 [151]

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50

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The atomic number is 50

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3 years ago
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Each molecule of lycopene contains 40 atoms of carbon (plus other atoms). The mass percent of carbon in lycopene is 84.49%. What
IrinaK [193]

Answer: 568g/mol

Explanation:

It should be noted that there are 40 atoms of carbon in lycopene.

Since mass of 1 carbon = 12g/mol

Mass of 40 carbon atoms = 40 × 12g/mol = 480g/mol

Let the molar mass of lycopene be represented by x.

Therefore the molar mass of carbon = x × mass percent of carbon in lycopene

x × 84.49% = 480g/mol

x × 0.8449 = 480g/mol

x = 480/0.8449

x = 568g/mol

The molar mass of lycopene is 568g/mol

5 0
3 years ago
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