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aliya0001 [1]
3 years ago
9

BRAINLIEST AND 20PTS!!!!!!

Chemistry
1 answer:
Elden [556K]3 years ago
7 0
1) Answer is: 5.
Chemical dissociation of aluminium sulfide in water:
Al₂S₃(aq) → 2Al³⁺(aq) + 3S²⁻(aq).
There are five ions, two aluminium cations and three sulfide anions.

2) Answer is: 4.
Chemical dissociation of aluminium fluoride in water:
AlF₃(aq) → Al³⁺(aq) + 3F⁻(aq).
There are four ions, one aluminium cation and three fluoride anions.
Aluminium has oxidation +3, because it lost three electrons, to gain electron configuration as noble gas neon.
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What is hydrogen ?,,,​
ASHA 777 [7]

Answer:

Hydrogen is the lightest element in the periodic table. Hydrogen is a gas of diatomic molecules and is colorless, odorless, non-toxic, and highly combustible. It is the most abundant chemical substance in the universe as it constitutes roughly 75% of all normal matter.

6 0
3 years ago
Read 2 more answers
Describe the characteristics that all living<br> things share.
andriy [413]

Answer:

Order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.

6 0
4 years ago
An 8 oz serving of whole milk has 8.0 g of fat, 8.0 g of protein, and 13 g of carbohydrates. Approximately how many kilocalories
dsp73
<h3>Answer:</h3>

156 calories

<h3>Explanation:</h3>
  • Carbohydrates, proteins and fats are food substances used by living organisms to generate energy required for the day to day activities.
  • They supply energy which differs per gram for each food substance.
  • That is;

1 g of carbohydrate = 4 calories

1 g of fat = 9 calories

1 g of protein = 4 calories

Therefore, whole milk serving containing 8.0 g of fat, 8.0 g of protein and 13 g of carbohydrates will contain the following number of calories;

8.0 g of fat = 8 g × 9 cal/g = 72 calories

8.0 g of protein = 8 g × 4 cal/g = 32 calories

13 g of carbohydrates = 13 g × 4 cal/g = 52 calories

Total amount of energy = 156 calories

Therefore, an 8 oz serving of whole milk contains 156 calories

8 0
3 years ago
Identify the following salts as neutral, acidic, or basic.
allochka39001 [22]

Answer:

1)NH4ClO4: acidic

2)NH4CN: basic

3)LiF: basic

4)KCN: basic

5)LiNO3: neutral

6)NH4Br: acidic

7)SrBr2: neutral

Explanation:

Salt is an ionic compound formed by the neutralization reaction between an acid and a base.The cation of base and anion from an acid combines to form a salt while H+ from acid and OH- from base forms water.

1)NH4Cl4: is an acidic salt formed from neutralization reaction between strong acid and a weak base.

2)NH4CN: is a basic salt formed from neutralization reaction between weak acid and weak base.

3)LiF: basic salt formed from neutralization reaction between strong acid and strong base.

4)KCN: basic salt formed from neutralization reaction between weak acid and strong base.

5)LiNO3: neutral salt formed from neutralization reaction between strong acid and strong base.

6)NH4Br: acidic salt formed from neutralization reaction between strong acid and weak base.

7)SrBr2: neutral acid formed from neutralization reaction between

strong acid and strong base.

4 0
4 years ago
What is the maximum mass of aluminum chloride that can be formed when reacting 18.0 g of aluminum with 23.0 g of chlorine?
Agata [3.3K]

<span>Number of moles of aluminum chloride = 0.216. </span>
<span>Mass of compound = Number of moles x Molar Mass </span>
<span>= 0.216mol x [ 37 + 3(35.5) ]g/mol </span>
<span>= 30.996 </span>
<span>= 31.0g (3 s.f.)</span>
4 0
3 years ago
Read 2 more answers
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