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Marizza181 [45]
4 years ago
10

An atom with an atomic number of 12 and a mass number of 25 can best be described by which of these

Chemistry
2 answers:
meriva4 years ago
8 0

A. An atom that contains 12 protons


Maslowich4 years ago
7 0

A. An atom that contains 12 protons <u><em>and 13 neutrons.</em></u>

<u><em /></u>

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HOW MANY M ARE IN 3.0X105 MM?
erik [133]

The answer to the question is 300meters.

7 0
3 years ago
A
BARSIC [14]

The number of C atoms in 0.524 moles of C is 3.15 atoms.

The number of SO_2 molecules in 9.87 moles  SO_2 is 59.43 molecules.

The moles of Fe in 1.40 x 10^{22} atoms of Fe is 0.23 x 10^{-1}

The moles of C_2H_6O in 2.30x10^{24} molecules of C_2H_6O is 3.81.

<h3>What are moles?</h3>

A mole is defined as 6.02214076 × 10^{23} of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.

A. The number of C atoms in 0.524 mole of C:

6.02214076 × 10^{23} x 0.524 mole

3.155601758 atoms =3.155 atoms

B. The number of SO_2 molecules in 9.87 moles of SO_2:

6.02214076 × 10^{23} x 9.87

59.4385293 molecules= 59.43 molecules

C. The moles of Fe in 1.40 x 10^{22} atoms of Fe:

1.40 x 10^{22} ÷ 6.02214076 × 10^{23}

0.2324754694 x 10^{-1} moles.

0.23 x 10^{-1} moles.

D. The moles of C_2H_6O in 2.30x10^{24} molecules of C_2H_6O:

2.30x10^{24} ÷ 6.02214076 × 10^{23}

3.819239854 moles=3.81 moles

Learn more about moles here:

brainly.com/question/8455949

#SPJ1

6 0
2 years ago
What is the overall voltage for the nonspontaneous redox reaction involving
Ann [662]

Answer:

Answer D => E°(Mg°/Cu⁺²) = 0.34 + 2.37 = 2.71v

Explanation:

(Oxidation) =>  Mg°(s) => Mg⁺²(aq) + 2e⁻    E°(Mg°/Mg⁺²) = -2.37 v

(Reduction) => Cu⁺²(aq) + 2e⁻ => Cu°(s)     E°(Cu⁺²/Cu°) = +0.34 v

________________________________________________

Net Rxn => Mg°(s) + Cu⁺²(aq) => Mg⁺²(aq) + Cu°(s)

Std Cell Potential (25°C/1Atm) = E°(Redn) = E°(Oxidn) = +0.34v - (-2.37v)

= 0.34v + 2.37v = 2.72v

6 0
3 years ago
Read 2 more answers
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Trava [24]

Answer:

b..................

4 0
3 years ago
Read 2 more answers
Can you name these for me
Mashcka [7]

Answer:

1. E. mitochondrion

2. C. chloroplasts

3. G. vacuole

4. A. cell membrane

5. B. cell wall

6. D.cytoplasm

7. F. Nucleus

8. cytoplasm

9. cell membrane

10. chloroplast

11. mitochondrion

12. nucleus

13. cell wall

14. vacuole

Explanation:

- Be familiar which each term.

- Look up diagram to understand image.

- Hope that helped! Please let me know if you need further explanation on each word.

4 0
4 years ago
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