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Harman [31]
2 years ago
14

Read the sentences from the Newsela article, "First All-Female Spacewalk Will Take Place During Women's History Month. "

Chemistry
1 answer:
belka [17]2 years ago
4 0

Answer:

C ; strayed

Explanation:

I took the k-12 quiz.

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What are the answers to these questions
Nikitich [7]

Answer:

1. Coal (B)

Explanation:

3 0
3 years ago
Read 2 more answers
If a point is chosen inside the square, what
tigry1 [53]

Point to be present exactly at midway between center and circumference of circle (let’s say radius = r) should lie at circumference of circle of radius r/2.

Favorable outcome = 2*pi*r/2

Total outcome = Point can be anywhere inside the circle of radius r = Area of circle = pi * r * r

Probability = (2*pi*r/2) / pi * r* r = 1/r.

Not completely sure about correctness . Waiting for comments to verify.

5 0
3 years ago
How many protons do you think are dissociable from propionic acid and butyric acid? Explain your reasoning.
RSB [31]

Answer:

One

Explanation:

The formulas for the two acids are CH₃CH₂COO-H and CH₃CH₂CH₂COO-H.

The key factors to consider are the polarities of the C-H and O-H bonds.

A. C-H bonds

The difference in electronegativity is ΔEN =|2.55 - 2.20| = 0.35.

This difference of so small that we usually consider the C-H bond to be nonpolar.

It is extremely unlikely that a C-H bond will dissociate onto ions.

B. O-H bonds

The difference in electronegativity is ΔEN =|3.44 - 2.20| = 1.24.

Thus, an O-H bond is highly polar covalent — the bond has about 32 % ionic character.

It is much more likely that an O-H bond will go all the way and dissociate onto ions.

RCOOH + H₂O ⇌ RCOO⁻ + H₃O⁺

The Kₐ for an O-H bond is about 10⁴⁶ times that of a C-H bond.

Only the O-H bond of a carboxylic acid will dissociate,

7 0
3 years ago
Which of the following would change Sodium into another atom?
sveticcg [70]

Answer:

I don't see any of the following. If you could possibly tell me what the following answers are in the comments I can help :)

4 0
3 years ago
One atom of an element possesses 80 protons, 80 electrons, and 121 neutrons. Given this information, what is the atomic mass of
IRINA_888 [86]

Answer:

I think the answer is 4) 41

Explanation:

APE= atomic number, proton and the electrons are the same number

MAN= mass = atomic number - neutrons

121 - 80 = 41

i haven't done this in a while so hope this helps :)

3 0
3 years ago
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