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Savatey [412]
3 years ago
14

I need help with this pls

Chemistry
1 answer:
N76 [4]3 years ago
3 0

Answer:

1)20 \\ 2)13 \\ 3)82 \\ 4)56 \\ 5)26 \\ 6)1 \\ hope \: it \: helps \\ plzzz \: mark \: it \: as \: brainliest...

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Which model of the atom is the most accurate
Zarrin [17]
Quantum Mechanical model (as per my knowledge)
7 0
3 years ago
64. Which of the followings can dissociate in water?
Arisa [49]

Answer:

<h2>Hi there !</h2>

<h2>C. HCl</h2>

Explanation:

<h2>Reason :-</h2>

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8 0
2 years ago
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Which of the following features is common to both acids and bases? A. ability to burn skin B. similar taste C. pH measurements g
Lynna [10]
<h3>Answer:</h3>

            Correct Option-A (Ability to burn skin)

<h3>Explanation:</h3>

                    When skin tissues are exposed to Acids or Bases a chemical burn occurs as both of these substances are corrosive in nature. These burns occur without providing any heat, results from a very fast reaction, are extremely painful and causes damage to structures present under skin.

                    Option-B is incorrect because Acids taste sour, while, Bases taste bitter.

                    Option-C is incorrect because pH of Acids is less than 7 while, pH of Bases is greater than 7.

3 0
3 years ago
Read 2 more answers
In a certain electrolysis experiment, 1.24 g of Ag were deposited in one cell (containing an aqueous AgNO3 solution), while 0.65
eduard

Answer:

The correct answer is 169.56 g/mol.

Explanation:

Based on the given information, the mass of Ag deposited is 1.24 g, and the mass of unknown metal X deposited in another cell is 0.650 g. The number of moles of electrons can be determined as,

= 1.24 g Ag * 1mol Ag/107.87 g/mol Ag * 1 mol electron/1 mol Ag ( the molecular mass of Ag is 107.87 g/mol)

= 0.0115 mole of electron

The half cell reaction for the metal X is,  

X^3+ (aq) + 3e- = X (s)

From the reaction, it came out that 3 faraday will reduce one mole of X^3+.  

The molar mass of X will be,  

= 0.650 g/0.0115 *3 mol electron/1 mol

= 56.52 * 3

= 169.56 g/mol

7 0
3 years ago
Which element has two valence electrons?
Colt1911 [192]

Answer:

It is A) Calcium

Explanation:

Calcium has an electronic configuration of 2,8,8,2

6 0
2 years ago
Read 2 more answers
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