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GrogVix [38]
3 years ago
6

Which is a gas at room temperature A.aluminum B.nitrogen C.potassium D.sodium

Chemistry
1 answer:
3241004551 [841]3 years ago
5 0

Answer:

B.nitrogen

Explanation:

Nitrogen is a gas at room temperature.

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What is scientific literacy?<br><br> Why is it important?
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Answer:Scientific literacy is the knowledge and understanding of scientific concepts and processes required for personal decision making, participation in civic and cultural affairs, and economic productivity. It also includes specific types of abilities.Science literacy is important because it provides a context for addressing societal problems, and because a science- literate populace can better cope with many of its prob- lems and make intelligent and informed decisions that will affect the quality of their lives and those of their children.

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3 years ago
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Which structure could a scientist look for in a plant that would identify it as a club moss rather than a liverwort?
Marianna [84]
<h3><u>Answer;</u></h3>

Phloem

<h3><u>Explanation;</u></h3>
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  • <u>Liverworts</u> on the other hand are bryophytes which belongs to the division bryophyta. Bryophytes are small, non-vascular plants which includes mosses, hornworts and liverworts.
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3 years ago
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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
What is the density of a gas at STP that has a molar mass of 50.0 g/mol?
Flura [38]

Answer:

2.232 g/L

Explanation:

Assuming 1 mol, volume at STP is 22.4 L so you simply divide 50g by 22.4 L to get density

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2 years ago
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D) Transportation is the correct answer
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