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Step2247 [10]
3 years ago
11

Which of the following correctly shows the relationship, in terms of number of particles, of the three substances?

Chemistry
1 answer:
uranmaximum [27]3 years ago
8 0
The answer is b but I’m not sure
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Name one way in which oxygen from the air reacts slowly with another materal
Pavlova-9 [17]
Well one answer would be metal
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3 years ago
Three isotopes of silicon have mass numbers of 28,29, and 30 with an average atomic mass of 28.086 what does this say about the
Sedbober [7]

Answer is: silicon isotope with mass number 28 has highest relative abundance, this isotope is the most common of these three isotopes.

Ar₁(Si) = 28; the average atomic mass of isotope ²⁸Si.  

Ar₂(Si) =29; the average atomic mass of isotope ²⁹Si.  

Ar₃(Si) =30; the average atomic mass of isotope ³⁰Si.  

Silicon (Si) is composed of three stable isotopes, ₂₈Si (92.23%), ₂₉Si (4.67%) and ₃₀Si (3.10%).

ω₁(Si) = 92.23%; mass percentage of isotope ²⁸Si.  

ω₂(Si) = 4.67%; mass percentage of isotope ²⁹Si.

ω₃(Si) = 3.10%; mass percentage of isotope ³⁰Si.

Ar(Si) = 28.086 amu; average atomic mass of silicon.  

Ar(Si) = Ar₁(Si) · ω₁(B) + Ar₂(Si) · ω₂(Si)  + Ar₃(Si) · ω₃(Si).  

28,086 = 28 · 0.9223 + 29 · 0.0467 + 30 · 0.031.

8 0
3 years ago
To which planet do scientist compare to Kepler-10
Stells [14]
To Earth, since it has the same radio and masses. This is what I believe.
7 0
4 years ago
Difference between proton and oxygen.​
Zielflug [23.3K]

Answer:

Proton is a sub atomic particle while oxygen is an atom ....

6 0
2 years ago
Read 2 more answers
Determine the pH of a 0.530 M solution of carbonic acid that has an acid dissociation constant of 4.4 x
Veronika [31]

Answer:

Explanation:

H2CO3  =  H+   +  HCO3-   H2CO3  =  0.530 M  Ka =4.4 X10^-7

Ka =[H+][A-]/[HA]        [H+] = [A-]

0.530 M x 4.4 X10^-7=  [H+}^2

2.32 X10^-7  =  [H+}^2

23.2 X10^-8 = [H+}^2

4.83 X 10^-4 = [H+]

pH = - log 4.83 X 10^-4

pH = -(.68-4)

pH =-(-3.32)

pH= 3.32

5 0
3 years ago
Read 2 more answers
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