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Ivanshal [37]
3 years ago
5

A factor that does no change in an experiment is the.

Chemistry
1 answer:
kvasek [131]3 years ago
5 0

Answer:

A. Controlled variable

Explanation:

a controlled variable or a constant variable is a variable that doesnt change during an experiment

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Lift up the glass in one bowl, and place an effervescent tablet in the water beneath it. Quickly place the inverted glass over t
Ugo [173]

The glass containing the effervescence tablet has a greater air space than the other.

<h3>What is effervescence?</h3>

The term effervescence refers to the evolution of a gas. An effervescence tablet is a tablet that is designed to release the gas called carbon dioxide.

When we add the effervescence tablet and compare the level of the water in the two bowls, we will see that the water in the glass containing the effervescence tablet has a greater air space than the other.

Learn more about carbon dioxide:brainly.com/question/14445045

6 0
3 years ago
what is the quotient of 8.01 grams divided by 3.127 grams expressed to the correct number of signicant figures
likoan [24]
Your going to want to round 8.01 to 8.01 and change 3.127 rounded too 3.1 
then u want to take  8.0 and 3.1 and times it and u will get 24.8 or 25
7 0
3 years ago
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What is wrong with the notation 1s22s22p63s23p63d104s24p2 for germanium (atomic number 32)?
Vaselesa [24]
<span>The notation is not written in the correct order as the 4s subshell should appear before the 3d subshell.
</span>The correct order in an electron configuration would be: 
1s , 2s , 2p , 3s , 3p , 4s , 3d , 4p , 5s , 4d , 5p , 6s , 4f , 5d , 6p ,..
So, for germanium the electronic configuration should be;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p² 



3 0
3 years ago
8) Determine whether mixing each pair of the following results in a buffera. 100.0 mL of 0.10 M NH3 with 100.0 mL of 0.15 MNH4Cl
Marina86 [1]

Answer:

a. 100.0 mL of 0.10 M NH₃ with 100.0 mL of 0.15 M NH₄Cl.

c. 50.0 mL of 0.15 M HF with 20.0 mL of 0.15 M NaOH.

Explanation:

A buffer system is formed in 1 of 2 ways:

  • A weak acid and its conjugate base.
  • A weak base and its conjugate acid.

Determine whether mixing each pair of the following results in a buffer.

a. 100.0 mL of 0.10 M NH₃ with 100.0 mL of 0.15 M NH₄Cl.

YES. NH₃ is a weak base and NH₄⁺ (from NH₄Cl ) is its conjugate base.

b. 50.0 mL of 0.10 M HCl with 35.0 mL of 0.150 M NaOH.

NO. HCl is a strong acid and NaOH is a strong base.

c. 50.0 mL of 0.15 M HF with 20.0 mL of 0.15 M NaOH.

YES. HF is a weak acid and it reacts with NaOH to form NaF, which contains F⁻ (its conjugate base).

d. 175.0 mL of 0.10 M NH₃ with 150.0 mL of 0.12 M NaOH.

NO. Both are bases.

6 0
3 years ago
Calculate the frequency of a wave with a wavelength of 8.00x10 m. In what region of the electromagneti spectrum is this?
zheka24 [161]

<em>The frequency of the wave with a wavelength of is</em> <u>3.748 × 10 ⁶ /s</u>.

I attached the working and the answer to the question below. I hope I was able to help.

Please note that C = speed of light (2.998 × 10⁸ m/s), ν = frequency and λ= wavelength.



7 0
3 years ago
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