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neonofarm [45]
3 years ago
11

how many protons, neutrons and electrons are contained in each element? a)27 over 13 AI, b)35 over 17 CI, c)34S

Chemistry
1 answer:
Dafna1 [17]3 years ago
4 0
Since the number on top is the mass number (number of neutrons and protons) while the number at the bottom is the atomic number ( number of protons)

A) 13 protons, 14 neutrons (27-13)

For the number of electrons it has to be equal to the number of protons if the atom is uncharged.

Therefore you have 13 electrons.

B) 17 protons, 18 neutrons (35-17)

18 electrons

C) What is the atomic number of Sulphur - need slightly more info
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2. The hydrogen and oxygen atoms chemically bond to form the
olasank [31]

Answer:

True.

Explanation:

hydrogen and oxygen=water or hydrogen oxide

H+O2=H2O.

5 0
3 years ago
Which of the following are nonelectrolytes? Hc2h302 (acetic acid) CH30H (method alcohol) h2So4 and c12h22011 (sucrose or table s
hoa [83]

Answer:

C₁₂H₂₂O₁₁ and CH₃OH

Explanation:

Sucrose and methyl alcohol are nonelectrolytes. They do not ionize or conduct a current in aqueous solution.

HC₂H₃O₂ is a weak electrolyte. It produces only a few ions and is a poor conductor of electricity in aqueous solution.

HC₂H₃O₂ + H₂O ⇌ H₃O⁺ + C₂H₃O₂⁻

H₂SO₄ is a strong electrolyte. Its first ionization is complete, so it is a good conductor of electricity in aqueous solution.

H₂SO₄ + H₂O ⟶ H₃O⁺ + HSO₄⁻

8 0
3 years ago
Sheena wants to measure the volume of a ball that is 24 cm across. How should she set up her equation?
Ksivusya [100]

Answer:

The volume of a ball that is 24 cm across is :

d). v = four-thirds pi 12 cubed

Explanation :

Ball is a sphere and volume of sphere is given by :

\frac{4}{3}\Pi r^{3}

r = radius of ball

r =\frac{24}{2}

r = 12 cm

Volume is :

\frac{4}{3}\Pi \times 12^{3}

8 0
4 years ago
Read 2 more answers
How much silver can be produced from 125g of Ag2S
rosijanka [135]

Answer:

108.9g of Silver can be produced from 125g of Ag2S

Explanation:

The compound Ag2S shows that two atoms of Silver Ag, combined with an atom of Sulphur S to form Ag2S. We can as well say the combination ration of Silver to Sulphur is 2:1

•Now we need to calculate the molecular weight of this compound by summing up the molar masses of each element in the compound.

•Molar mass of Silver Ag= 107.9g/mol

•Molar mass of Sulphur S= 32g/mol

•Molecular weight of Ag2S= (2×107.9g/mol) + 32g/mol

•Molecular weight of Ag2S= 215.8g/mol + 32g/mol= 247.8g/mol

•From our calculations, we know that 215.8g/mol of Ag is present in 247.8g/mol of Ag2S

If 247.8g Ag2S produced 215.8g Ag

125g Ag2S will produce xg Ag

cross multiplying we have

xg= 215.8g × 125g / 247.8g

xg= 26975g/247.8

xg= 108.85g

Therefore, 108.9g of Silver can be produced from 125g of Ag2S

3 0
4 years ago
Read 2 more answers
Metals are cunductor of heat and electricity prove this statement​
Grace [21]

Answer:Metals are an excellent conductor of electricity and heat because the atoms in the metals form a matrix through which outer electrons can move freely. Instead of orbiting their respective atoms, they form a sea of electrons that surround the positive nuclei of the interacting metal ions.

Explanation:

7 0
3 years ago
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