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andriy [413]
2 years ago
7

An atom contains 8 protons, 8 neutrons and 10 electrons. A second atom

Chemistry
1 answer:
topjm [15]2 years ago
8 0

Answer:

both atoms are ions

Explanation:

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It is 12:00 and you just heard that local officials are tracking a violent storm heading westward, directly for your town and sc
strojnjashka [21]

Answer:

The answer is : Yes

Explanation:

because it 12:00 and the storm is moving at 25km/hr and it 75 km away that means in three hours the storm would hit your town so at 3:00 the storm would hit at your at ends at 2:00 so yes you would get home before he storm hit.

3 0
3 years ago
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Q: If the average speed of a species of tortoise is 0.36 km/h, what is that speed in cm/s?
Marina CMI [18]

Answer:

36000 centimeters

Explanation:

If the average speed of a species of tortoise is 0.36 km/h, then it would be 36000 centimeters.

5 0
3 years ago
What was the control in Pasteur's experiment?
Sholpan [36]

Answer:

a straight neck flask to allow air to get in

Explanation:

I took the test eWe

8 0
3 years ago
When was copper discovered?​
Vesna [10]

Answer:

9000 BC

Explanation:

Although various copper tools and decorative items dating back as early as 9000 BCE have been discovered, archaeological evidence suggests that it was the early Mesopotamians who, around 5000 to 6000 years ago, were the first to fully harness the ability to extract and work with copper.

3 0
3 years ago
For some hypothetical metal the equilibrium number of vacancies at 750°C is 2.8 × 1024 m−3. If the density and atomic weight of
mash [69]

Answer:

The correct answer is 5.447 × 10⁻⁵ vacancies per atom.

Explanation:

Based on the given question, the at 750 degree C the number of vacancies or Nv is 2.8 × 10²⁴ m⁻³. The density of the metal is 5.60 g/cm³ or 5.60 × 10⁶ g/m³. The atomic weight of the metal given is 65.6 gram per mole. In order to determine the fraction of vacancies, the formula to be used is,  

Fv = Nv/N------ (i)  

Here Nv is the number of vacancies and N is the number of atomic sites per unit volume. To find N, the formula to be used is,  

N = NA×P/A, here NA is the Avogadro's number, which is equivalent to 6.022 × 10²³ atoms per mol, P is the density and A is the atomic weight. Now putting the values we get,  

N = 6.022 × 10²³ atoms/mol × 5.60 × 10⁶ g/m³ / 65.6 g/mol

N = 5.14073 × 10²⁸ atoms/m³

Now putting the values of Nv and N in the equation (i) we get,  

Fv = 2.8 × 10²⁴ m⁻³ / 5.14073 × 10²⁸ atoms/m^3

Fv = 5.44669 × 10⁻⁵ vacancies per atom or 5.447 × 10⁻⁵ vacancies/atom.  

4 0
3 years ago
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