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Dmitriy789 [7]
1 year ago
13

For each of the following atomic numbers, use the periodic

Chemistry
1 answer:
Cerrena [4.2K]1 year ago
6 0

The ions in a formed;

  • 13 - Al - Al^3+
  • 34 - Se - Se^2-
  • 56 - Ba - Ba^2+
  • 7 - N - N^3-
  • 87 - Fr - Fr^+
  • 35 - Br - Br^-

<h3>What is the atomic number?</h3>

The atomic number is the number of protons in an atom. It is also the number electrons in the neutral atom. Now we know that when an ion is formed, electrons are lost or gained by the atom.

Let us now write the ions that are formed by each of the atoms of elements that have the atomic number as listed;

  • 13 - Al - Al^3+
  • 34 - Se - Se^2-
  • 56 - Ba - Ba^2+
  • 7 - N - N^3-
  • 87 - Fr - Fr^+
  • 35 - Br - Br^-

Learn more about atomic number:brainly.com/question/16858932

#SPJ1

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4. Which of the following statements correctly describe atoms? Select all that apply.
mestny [16]

Answer:

A, B, and C

Explanation:

Atoms do in fact have mass! They are also the basic unit of a chemical element. Matter is in fact made of atoms, but atoms do not take up space.

Atoms are filled with empty space, excluding it out from the rest of the answers.

So yes, A, B, and C should be the correct answers

6 0
2 years ago
what mass of aluminium hydroxide is needed to decompose in order to produce 65.0 L of water at STP in stoichiometry?
pishuonlain [190]
Aluminium Hydroxide on decomposition produces Al₂O₃ and Water vapors. 

<span>                               2 Al(OH)</span>₃    →    Al₂O₃  +  3 H₂O


According to equation at STP,

       67.2 L (3 moles) of H₂O is produced by  =  78 g of Al(OH)₃
So,
                65.0 L of H₂O will be produced by  =  X g of Al(OH)₃

Solving for X,
                                 X  =  (65.0 L × 78 g) ÷ 67.2 L

                                 X  =  75.44 g of Al(OH)₂
Result:
           75.44 g of Al(OH)₂ is needed to decompose in order to produce 65.0 L of water at STP in stoichiometry
6 0
2 years ago
Read 2 more answers
Balance the reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1.
Ann [662]
2HCL + __ Zn --> ZnCl2 + H2

i think that's right, not exactly sure.
7 0
3 years ago
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What is the molar mass of calcium chloride dihydrate (CaCl2 • 2H2O)? Be sure to
Verdich [7]

Calcium chloride dehydrate (CaCl₂ · 2 H₂O) have a molar mass equal to 147 g/mol.

Explanation:

To calculate the molar mass of calcium chloride dehydrate (CaCl₂ · 2 H₂O) we use the following formula:

molar mass of CaCl₂ · 2 H₂O = atomic weight of Ca × 1 + atomic weight of Cl × 2 + atomic weight of H × 4 + atomic weight of O × 2

molar mass of CaCl₂ · 2 H₂O = 40 × 1 + 35.5 × 2 + 1 × 4 + 16 × 2

molar mass of CaCl₂ · 2 H₂O = 147 g/mol

Learn more about:

molar mass

brainly.com/question/6112557

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4 0
3 years ago
Can someone help me with science plz.
Ymorist [56]

Answer:

most likely a microscope

Explanation:

Within optical microscopes, there are wide-field microscopes and confocal microscopes. Wide-field scopes include your basic light microscope, which has a lens or lenses to magnify visible light transmitted or reflected by a sample. They're good for looking at single layers of cells or thin tissues, Piston sai

7 0
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