2 years ago

The correct mass of a block is 28.0 grams. A chemist measures the block

Chemistry

1 answer:

Sati [7]2 years ago

3 0

Answer: NOT accurate, but precise.

[translation: You screwed up, but did it in style].

Explanation:

The average mass measurement is 41.95g. Compared to the actual value of 28.0 grams, the measurement is NOT accurate.

The standard deviation for the data is 0.112. Dependiong on your definition of precision, this looks relatively good. I would go for precise.

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KClKCl has a lattice energy of −701 kJ/mol.−701 kJ/mol. Consider a generic salt, ABAB , where A2+A2+ has the same radius as K+,K

elena-14-01-66 [18.8K]

Explanation:

It is given that lattice energy is -701 kJ/mol.

Whereas it is known that realtion between lattice energy and radius is as follows.

Lattice energy $\propto \frac{Z_{+}Z_{-}}{r}$

where, $Z_{+}$ = +2, and $Z_{-}$ = -2

Therefore, lattice energy of AB = $4 \times \text{lattice energy of KCl}$

= $4 \times -701 kJ/mol$

= -2804 kJ/mol

Thus, we can conclude that lattice energy of the salt ABAB is -2804 kJ/mol.

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the 1,3- butadiene is h2c=ch-ch=ch2, so we have

sp² sp² sp² sp²
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<span>the hybridization of the carbon atoms is </span>sp² : trigonal planar

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dimaraw [331]

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