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3 years ago

Hi!!! Please help with six science questions!!!!! 60 points and brainliest!

2 answers:

fomenos3 years ago

8 0

Hello!

I believe the answer to question 1 is: A. Acids.

2. Any chemical compound containing one or more groups, each comprising one atom each of oxygen and hydrogen bonded together and functioning as the negatively charged ion OH-.

3. Strong acids have a higher concentration of hydrogen ions than weak acids.

4. A weak base does not ionize fully in an aqueous solution. For example, NaOH is a stronger base than diethylamine because of the degree in ionization in waer to produce OH- ion.

5. Any substance with a pH value between 0 up to 7 is considered acidic, whereas a pH value of 7 to 14 is a base.

6. The chemical formula for water is usually written as H2O, but another way to consider it is HOH, where a positively charged hydrogen ion H is bonded to a negatively charged hydroxide ion H. This means water has properties of both an acid and a base, where the properties essentially cancel each other out.

I hope you found this helpful! c:

Shkiper50 [21]3 years ago

3 0

1. A
2. base
3. strong ones have more h30 weak ones have more OH
4. strong ones have more OH weak ones have more H30
5. One of the main differences between acids and bases is that acids have a pH that is less than 7 and bases have a pH that is greater than 7. When dissolved in water, acids are substances that will cause the concentration of hydrogen ions (H+) to increase. Bases, when dissolved in water, will instead cause the number of hydroxide ions (OH-) to increase.6.Idk

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defon

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250 g

Explanation:

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This question asksyou to apply Hess's law.
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6 H2(g) + 3O2 (g) --> 6H2O(l) delta H= -1716 kJ
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3 years ago

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A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make

Marta_Voda [28]

Answer:

32g

Explanation:

potassium nitrate has solubility of about 67g per 100g of water at 40°C, which means that potassium nitrate solution will contain 67g of dissolved salt for every 100g of water.

since at this temperature, our solution contains 35g of potassium nitrate 100g of water. The solution will be unsaturated because of the less potassium nitrate.

to make saturated solution,

mass of potassuim nitrate = 67g - 35g

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which means dissolving another 32g of potassium nitrate in solution at 40 °C will make saturated solution.

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Which of the following is true concerning ψ²? A) ψ² describes the probability of finding an electron in space. B) ψ² describes t

Ilia_Sergeevich [38]

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