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Nezavi [6.7K]
3 years ago
9

HELP ME NOW PLEASE 80 points

Chemistry
2 answers:
Ainat [17]3 years ago
5 0

Answer:

id.k sorry

Explanation:

Law Incorporation [45]3 years ago
4 0

Answer:

1. Algae

2. Insects

3. Crayfish

4. Trout

5. Herons

Explanation:

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Which one of the following compounds will be least soluble in water?
algol [13]

Water is a polar solvent. Since, 'Like dissolves like' a polar compound will be most soluble in water whereas a non-polar compound will be the least soluble.

The increasing order of polarity for the given organic compounds is:-

CH3OCH3 < CH3NH2 < CH3CHO < CH3CH2OH

Ether is the least polar and hence least soluble in water.

8 0
2 years ago
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so how many moles of Fe are in 3.10 mole of iron oxide FeO still waiting for answer please, my grandchild needs help that I can'
alisha [4.7K]
The answer is 3.10 because it's still the same amount moles of iron.
7 0
3 years ago
A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?
Katarina [22]
 <span>0.38 

You first calculate the total moles by dividing the grams by molecular weight: 
45 g N2 / 28.02 g/mol = 1.6 mol N2 
40 g Ar / 39.95 g/mol = 1.0 mol 

Then you divide the moles of Ar by the total number of moles: 
1.0 / (1.6 + 1.0) = 0.38 mol fraction</span>
8 0
3 years ago
Which indicator would show a pH change from 6 to 7?
tatyana61 [14]

Answer:

c

Explanation:

1. litmus paper is used when showing a change between a greater range in ph levels - so A and D are automatically a no.

2. methyl red is used to show a range in ph levels between 4.8-6

3. Option C is the only one left so im going to assume its C because its definitely not A, B, or D

7 0
2 years ago
Could someone help me balance this chemical equation please
Softa [21]
Balanced equation:
Ca(OH)2+H2SO4=CaSO4+2 H20<span />
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