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sladkih [1.3K]
3 years ago
6

What effect did the discovery of gallium have on the acceptance of the periodic table?

Chemistry
1 answer:
Degger [83]3 years ago
7 0
The effect that the discovery of gallium have on the acceptance of the periodic table would be that <span>he predicted that there were 2 elements between zinc and arsenic which gave scientist the powerful tool. Hope this answers the question. Have a nice day.</span>
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Freezing, condensation, Deposition.
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3 years ago
suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a s
Tanya [424]

Answer:

  • <u>0.6826 (68.26%)</u>

Explanation:

<u>1) Find the z-scores:</u>

  • z = [X - μ ] / σ

a) z-score for 22.6 inches length

  • X = 22.6
  • μ = 20
  • σ = 2.6

  • z = [ 22.6 - 20 ] / 2.6 = 1.00

b) z-score for 17.4 inches length

  • X = 17.4
  • μ = 20
  • σ = 2.6

  • z = [ 17.4 - 20 ] / 2.6 =  - 1.00

<u>2) Probability</u>

Then, you have to find the probability that the length of an infant is between - 1.00 and 1.00 standards deviations (σ) from the mean (μ).

That is a well known value of 68%, which is part of the 68-95-99.7 empirical rule.

The most exact result is obtained from tables and is 68.26%:

  • 1 - P (z ≥ 1.00) - P (z ≤ - 1.00) = 1 - 0.1587 - 0.1587 = 0.6826 = 68.26%
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3 years ago
I can't find the density of this question I need help
zaharov [31]
Density is Mass divided by volume.
4 0
3 years ago
What is the name for a substance that cannot be separated into simpler substances ?
Delicious77 [7]

Answer:a element

Explanation:

4 0
2 years ago
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