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3 years ago

12

Three students use a meterstick with millimeter markings to measure a length of wire. Their measurements are 3 cm, 3.3 cm, and 2

.87 cm,
respectively. Explain which answer was recorded correctly.

2 answers:

Volgvan3 years ago

7 0

Answer: 3 cm

Explanation:

andreev551 [17]3 years ago

3 0

The answer is 3 I had this two

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Answer:

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Explanation:

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2 years ago

Show the curved-arrow mechanism for the Claisen condensation of ethyl ethanoate treated with ethoxide ion. Include all formal ch

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Answer:

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Explanation:

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3 years ago

1. The H atom and the Be +3 ion each have one electron. Does the Bohr model predict their spectra accurately? Would you expect t

lesantik [10]

Answer:

yes the Bohr model predicts their spectra accurately

Explanation:

The Bohr model based on one electron system

The atom H has a single atom and the ion Be+3 has a single atom as well and this proves that the Bohr model predicts their spectra accurately .

also apply the equation model to further explain

E = $\frac{-(z^2) (2.18 * 10^{-18}j) }{n^2}$

z = atomic number

for H the value of z = 1

for Be+3 the value of z = 4

when this values are substituted into the equation above

E = $\frac{-(1) (2.18 * 10^{-18}j) }{n^2}$ , E = $\frac{-(4) (2.18 * 10^{-18}j) }{n^2}$

this results show that the energy level of Be+3 is higher than the energy level of H by a factor of 16 , and this shows that their line patterns are similar

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