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mariarad [96]
3 years ago
11

PHYSICAL SCIENCE!!!!!

Chemistry
1 answer:
s2008m [1.1K]3 years ago
8 0

Answer:

the first one

Explanation:

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Yasmins teacher tells her that the solubility of salt is 360g/L at room temperature (25C) . How can yasmin make an unsaturated s
OLga [1]
35c that’s all I know to be honest
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3 years ago
The formation of protons over neutrons (thus producing about a 7:1 ratio) was favored in the early universe because:____.
tatiyna

Because it requires more energy to create a neutron from a proton than it does to create a proton from a neutron, protons were formed more frequently than neutrons in the early universe. The correct answer is option b.

To find the answer, we need to know more about the early universe.

<h3>How the formation of proton over neutrons was favored in the early universe?</h3>
  • A neutron is produced with greater energy than a proton.
  • However, later on, some of the protons were changed into neutrons.
  • Contrary to some claims, the proton is a stable particle that never decays, but the neutron is unstable outside of the nucleus and decays with a half life of around 10.5 minutes.
  • However, very few would have had time to decay on the timeline you mention in your question.
  • Every matter particle should have been accompanied by an antimatter particle, and every proton, neutron, and electron, by an anti-neutron and a positron, respectively.
  • Where did all the antimatter go is the great mystery. There have been a few attempts to explain this, but they have failed.

Thus, we can conclude that, the correct answer is option b.

Learn more about the early universe here:

brainly.com/question/28130096

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7 0
2 years ago
11. 2073 Set D Q.No. 1 Ammonia molecule has got trigonal
Nikolay [14]

Answer:

See explanation

Explanation:

I know that we usually associate the sp3 hybridization to the tetrahedral shape. This is common in molecules such as CH4. So it may sound somewhat strange that NH3 molecule has an sp3 hybridized nitrogen atom and a trigonal pyramidal geometry.

Let us recall that the central nitrogen atom in NH3 has a lone pair of electrons. These lone pairs causes more repulsion than bond pairs. As a result of the presence of this lone pair, the bond angle in the NH3 molecule is distorted away from the expected 109.7 degrees in tetrahedral geometry and the bonding groups are now arranged in a trigonal pyramidal geometry(with bond angle less than 109.7 degrees) to minimize electron pair repulsions.

5 0
3 years ago
For the following equation: 4NH3(g) + 7O2(g) ® 4NO2(g) + 6H2O(g), how many moles of ammonia (NH3) will be required to produce 10
Mariulka [41]

Answer:

6.67 moles of NH₃

Explanation:

From the equation of reaction,

4NH₃(g) + 7O₂(g) → 4NO₂(g) + 6H₂O(g),

4 moles of NH₃ will produce 6 moles of 6H₂O,

X moles of NH₃ will produce 10 moles of H₂O

X = (10 * 4) / 6

X = 6.67 moles of NH₃

6.67 moles of NH₃ will produce 10 moles of H₂O

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Do you think it was ethical, or fair, to use canaries this way? Explain.
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