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zimovet [89]
4 years ago
6

What do all the elements in one row of the periodic table have in common?

Chemistry
2 answers:
Hoochie [10]4 years ago
5 0

Answer:

B

Explanation:

This is because the periodic table is designed this way.

Delicious77 [7]4 years ago
5 0

Answer:its b

Explanation:

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The amount of a harmful chemical to which a person is exposed is the ____.
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Solid, Liquid, and Gas

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Devices that mix air or oxygen with flammable gasses cannot be used unless approved by
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Flammable gases are gases that have the tendency to <u>explode (burst into flames)</u> when they come in contact with the <u>appropriate quantities of air, oxygen, or any suitable oxidant.</u>

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Devices that mix air or oxygen with flammable gasses cannot be used unless approved by an <u>authorized or approved personnel.</u>

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  • Examples of flammable gases are hydrocarbons such as <u>Propane, Acetylene</u>, e.t.c.

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8 0
3 years ago
1. A sample of polystyrene is found to have a number-average molar mass of 89,440 g mol−1 . Neglecting contributions from end gr
Snowcat [4.5K]

Answer:

The weight-average molar mass of polystyrene is 134,160 g/mol.

Explanation:

Molar mass of the monomer styrene , C_8H_8, M=104 g/mol

Given , number average molar mass of the polymer , M'= 89,440 g/mol

Degree of polymerization = n

n=\frac{M'}{M}=\frac{89,440 g/mol}{104 g/mol}=860

The weight-average molar mass = M_{avg}=?

Molar mass dispersity is ratio of weight-average molar mass to the number average molar mass of the polymer.

\text{Molar mass dispersity}=\frac{M_{avg}}{M'}

1.5=\frac{M_{avg}}{89,440 g/mol}

M_{avg}=89,440 g/mol\times 1.5 = 134,160 g/mol

The weight-average molar mass of polystyrene is 134,160 g/mol.

8 0
3 years ago
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