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jonny [76]
3 years ago
6

A celestial body is any natural (i.

Chemistry
2 answers:
Nastasia [14]3 years ago
7 0

THE ANSWER IS I.ASTEROIDS   II.COMETS   III. METEOROIDS   IV. PLANETS PLZ MARK BRAINLISEST HOPE I HELPED THX

Nitella [24]3 years ago
7 0

Answer: I.asteroids II.comets III.meteoroids IV.planets

All of the above

Explanation:

Solar system is family of Sun. The planets an other celestial bodies, orbit around the Sun in elliptical orbit with Sun at one of the foci.

Solar system has 8 planets, asteroids that lie between orbits of Mars and Jupiter in asteroid belt, comets lie in Kuiper belt and Oort clouds and meteoroids that that is the debris of planets and comets.

All these objects orbit the Sun.

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You have a 250. -ml sample of 1. 28 m acetic acid (ka = 1. 8 x´ 10–5). calculate the ph of the best buffer.
Nadya [2.5K]

The ph of the best buffer is 4.74

The given acetic acid is a weak acid

The equation of the pH of the buffer

pH = pKa + log ( conjugate base / weak acid ).

For best buffer the concentration of the weak acid and its conjugate base is equal.

pH = pKa + log 1

pH = pKa + 0

pH = pKa

given Ka = 1.8 × 10⁻⁵

pKa = - log ka

pH = -log ( 1.8 × 10⁻⁵ )

pH = 4. 74

Hence the pH of the best buffer is 4.74

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The next step is to find how the 2 ions can lose and gain electrons equally. In this case, since each Na ion only loses 1 electron, it cannot satisfy the need of one carbonate ion, since they need 2, not 1. Therefore, 2 Na ions can cover the need of one carbonate ion. So, the ratio of Na to CO3 ion should be 2:1.

Now just combine the 2 ions, positive one at the front, which makes it NaCO3, make sure you do not add the charge and notice that CO3 is a molecule itself so do not remove the 3. Now because the ratio is 2:1, so the final formula is Na2CO3, no need to add 1 if the ratio is 1.

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