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Y_Kistochka [10]
3 years ago
7

Which two particles in an atom are equal in mass

Chemistry
2 answers:
Taya2010 [7]3 years ago
8 0
Protons and neutrons.

Note: They probably are ABOUT the same mass. Don't think they are exactly the same.

Hope this helps! 
lozanna [386]3 years ago
4 0
Protons and Neutrons. 
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What can you conclude about red visible light waves compared to blue visible light waves?
lawyer [7]

Explanation:

On comparing blue visible light with red visible light, there is difference in the wavelength, frequency, and energy. The difference between both red and blue visible lights are as follows.

Blue visible light:

  • It has low wavelength.
  • High frequency.
  • More energy.              

Red visible light:

  • It has high wavelength.
  • Low frequency.
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7 0
3 years ago
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A 34.57 mL sample of an unknown phosphoric acid solution is titrated with a 0.127 M sodium hydroxide solution. The equivalence p
Bas_tet [7]

<u>Answer:</u> The concentration of unknown phosphoric acid solution is 0.034 M

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is H_3PO_4

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=3\\M_1=?M\\V_1=34.57mL\\n_2=1\\M_2=0.127M\\V_2=28.2mL

Putting values in above equation, we get:

3\times M_1\times 34.57=1\times 0.127\times 28.2\\\\M_1=\frac{1\times 0.127\times 28.2}{3\times 34.57}=0.034M

Hence, the concentration of unknown phosphoric acid solution is 0.034 M

7 0
3 years ago
Four different methods are described for validating the results of a particular analysis. Indicate for each whether the method p
il63 [147K]

Answer:

A) Precision

B) Accuracy

C) Precision

D) Accuracy

Explanation:

<em>Accuracy</em> and <em>Precision </em>are factors that determine whether a given analysis is appropiate or not.

Accuracy refers to how close the experimental result is to a <em>known, theoretical or accepted value. </em>For this reason every method that checks the accuracy uses a standard -this could mean repeating the test using the standard instead of the sample, or adding a known amount of analyte to the sample-, in order to compare the results.

Precision refers to how close repeated the results of different tests are to each other, in other words, it refers to the <em>repeatability </em>of the method. A test for precision would require that the method is done several times, in order to check how close the results are to each other, regardless of whether those results are close to the expected value.

7 0
3 years ago
41Ca decays by electron capture. The product of this reaction undergoes alpha decay. What is the product of this second decay re
dimaraw [331]

Answer:

Cl

Explanation:

⁴¹Ca has an atomic number equal to 20, it means that it has 20 protons and 20 electrons ad its neutral state. In the decay by electron capture, it will lose one electron and will become a cation, but the mass (41) and the atomic number will remain the same.

When Ca⁺ undergoes alpha decay, it will lose an alpha particle, which has mass 4 and 2 protons.

⁴¹₂₀Ca⁺ → ³⁷₁₈X⁺ + ⁴₂α

To be stable, X will lose a proton and will become ³⁷₁₇X. The element which has atomic number 17 is chlorine, Cl.

4 0
3 years ago
Which of the following statements is NOT true about neutralization?
rjkz [21]

Answer:

D

Explanation:

4 0
3 years ago
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