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LekaFEV [45]
2 years ago
15

Which statements are scientific statements? Select all the correct answers. People who drive red cars are more prone to accident

s. Children from families that have pets are more likely to develop allergic reactions. Chinese cuisine is tastier than Mexican cuisine. Those in the younger generation should learn to respect their elders. People who walk to work are healthier than those who commute to work in vehicles.
Chemistry
1 answer:
mojhsa [17]2 years ago
3 0

Explanation:

Scientific statements are define as those statements which are testable and can be falsified or proven wrong.

So, the scientific statements are:

  • People who drive red cars are more prone to accidents.
  • Children from families that have pets are more likely to develop allergic reactions.
  • People who walk to work are healthier than those who commute to work in vehicles.
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The mole fraction of iodine, i2, dissolved in dichloromethane, ch2cl2, is 0.115. what is the molal concentration, m, of iodine i
german
The molality of a solute is equal to the moles of solute per kg of solvent. We are given the mole fraction of I₂ in CH₂Cl₂ is <em>X</em> = 0.115. If we can an arbitrary sample of 1 mole of solution, we will have:

0.115 mol I₂

1 - 0.115 = 0.885 mol CH₂Cl₂

We need moles of solute, which we have, and must convert our moles of solvent to kg:

0.885 mol x 84.93 g/mol = 75.2 g CH₂Cl₂ x 1 kg/1000g = 0.0752 kg CH₂Cl₂

We can now calculate the molality:

m = 0.115 mol I₂/0.0752 kg CH₂Cl₂
m = 1.53 mol I₂/kg CH₂Cl₂

The molality of the iodine solution is 1.53.
5 0
3 years ago
If the valency of oxygen is 2, derive the valencies of the other elements present in the following oxides. Na2O, ZnO , Al2O3 , M
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Answer:

1)Na2O

let the valency of Na is x

2(x)+(2)=0

2x+2=0

2x=-2

x=-1

2)ZnO

let the valency of Zn is x

x+2=0

x=-2

3)Al2O3

let the valency of Al is x

2(x)+3(2)=0

2x+6=0

2x=-6

x=-3

4)MgO

let the valency of Mg is x

x+2=0

x=-2

7 0
3 years ago
Read 2 more answers
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Answer: option C

Explanation:

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Here I found some info at Yahoo answers: https://answers.yahoo.com/question/index?qid=20090119191941AAB7oAb
The more electronegative an atom is the more unwilling it is to lose its electrons in a compound. If you do try to take a very EN atom away from a compound you'll need to apply a lot of energy for that to happen. I can give an example of a single atom though 

<span>Cl has 7 valence electron filled and every atom wants to be like nobles (noble gases), so it's not going to give an electron away b/c it's really close to being like a noble gas. Noble gases are the most stable atoms, which is why I say stability counts.</span>
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3 years ago
Calculate the percentage of all elements in Fel(OH)3
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Answer: 30.06% is your answer.

I hope this helps.

Stay safe and have a good day :D

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