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Bingel [31]
3 years ago
6

WORTH 40 POINTS HELLPPPP What class of element is Astatine (At)?

Chemistry
1 answer:
nordsb [41]3 years ago
3 0

Answer:

halogen.

nonmetal.

Explanation:

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How many moles of carbon are in 3.5 moles of calcium carbonate? ______?
DerKrebs [107]
<span>3.5 moles CaCO3 (1 mole carbon/1 mole CaCO3) = 3.5 moles</span>
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Calculate the grams of ethane present in a sample containing 0.4271 moles if the molar mass of ethane is 30.067 g/mol.
adelina 88 [10]

The grams of ethane present in a sample containing 0.4271 mole is 12.84 g

<h3>Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation

Mole = mass / molar mass

With the above formula, we can obtain the mass of ethane. Details below

<h3>How to determine the mass of ethane</h3>

The following data were obtained from the question:

  • Mole of ethane = 0.4271 mole
  • Molar mass of ethane = 30.067 g/mol
  • Mass of ethane =?

The mass of ethane present in the sample can be obtained as follow:

Mole = mass / molar mass

Cross multiply

Mass = mole × molar mass

Mass of ethane = 0.4271 × 30.067

Mass of ethane = 12.84 g

Learn more about mole:

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2 years ago
I cant seem to figure out ANY of these... help when you can pls :.)
Nonamiya [84]
The first one is some reaction with water even I am studying the same
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What is another word for the sound barrier?
8090 [49]

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The Answer is B. Destructive Interference

Explanation:

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Wuy Piolcululugu<br> Give the names of two organs in the chest.<br> 1. ...............<br> 2 m
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Answer:

The organs present inside the chest are :

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2. The heart

Explanation:

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This cavity actually contain three space each round with mesothelium , pleural cavity and precardial cavity.

This contain the lungs , the tracheobronchial tree , the heart , the blood vessels which transport the blood between the heart and the lungs.

It also contain the esophagus .

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