1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tankabanditka [31]
3 years ago
5

How is iodine-131 the same as iodine-126

Chemistry
1 answer:
tamaranim1 [39]3 years ago
8 0
Iodine 131 and iodine 126 are the same in the sense that, they both have the same number of electrons and protons in their atoms, it is only the number of their neutrons that is different. Iodine 131 has 78 neutrons while iodine 126 has 73 neutrons.
You might be interested in
What are safety considerations for a zipline?
Lina20 [59]
The wire could break when your on it. Another one this is kind of personal if you don't stop yourself on the zip line you could slam off the rope or post.
4 0
3 years ago
Calculate the pressure of O2 (in atm) over a sample of NiO at 25.00°C if ΔG o = 212 kJ/mol for the reaction. For this calculatio
Pepsi [2]
Answer : Given data ;
Δ G° = 212 KJ/molTemperature is = 25+273 = 298 KAnd gas constant R = 0.008314 KJ/mol

The reaction is NiO(s) ⇌ Ni(s) + \frac{1}{2}  O_{2 _{(g)} We can find out the pressure on oxygen by using the equation of gibb's free energy with remainder quotient which is,                                      ΔG = ΔG° +RT lnQ
when at equilibrium Q = K, here K is equilibrim constant, and ΔG becomes 0;
so we get, 0 = ΔG° + RT ln K
on rearranging we get, ln K = ΔG° / (RT)
ln K = 212 / (0.00831 X 298) = 85.6  
Here, now K =  = 1.51 X 10^{37}
When we get K = 1.51 X 10^{37}

But, K = (PO_{2})^ \frac{1}{2}So, (1.51 X 10^{37}) ^ \frac{1}{2} = 3.87 X 10^{18}
Hence, the pressure of oxygen will be = 3.87 X 10^{18} Pa

Now, Pa to atm conversion will be 3.756 X 
10^{13} atm
7 0
3 years ago
Which is a chemical change?
miskamm [114]

Answer:A

Explanation:

Because the water at first was not cold or warm and you want to warm it up and it’s gonna obviously be on a bowl so the taste of the bowl has a type of chemical and when you boil the water it is going to go to absorb

the water

3 0
3 years ago
Write the balanced net ionic equation for the reaction that occur in the following case. Cr2(SO4)3(aq)+(NH4)2CO3(aq)→
solmaris [256]
Cr2(SO4)3(aq) + 3(NH4)2CO3(aq) → 3(NH4)2SO4(aq) + Cr2(CO3)3(s) 

<span>Ionic: 2Cr+3 + 3SO4^-2 + 6NH4+ + 3CO3^-2 ----> 6NH4+ + 3SO4^-2 + Cr2(CO3)3 (spectator ions are NH4+, SO4^-2) </span>

<span>Net Ionic: 2Cr^+3(aq) + 3CO3^-2(aq) -------> Cr2(CO3)3(s) </span>
6 0
3 years ago
Read 2 more answers
The first step in industrial nitric acid production is the catalyzed oxidation of ammonia. Without a catalyst, a different react
murzikaleks [220]

<u>Answer:</u> The value of K_{eq} is 4.84\times 10^{-5}

<u>Explanation:</u>

We are given:

Initial moles of ammonia = 0.0280 moles

Initial moles of oxygen gas = 0.0120 moles

Volume of the container = 1.00 L

Concentration of a substance is calculated by:

\text{Concentration}=\frac{\text{Number of moles}}{\text{Volume}}

So, concentration of ammonia = \frac{0.0280}{1.00}=0.0280M

Concentration of oxygen gas = \frac{0.0120}{1.00}=0.0120M

The given chemical equation follows:

                  4NH_3(g)+3O_2(g)\rightleftharpoons 2N_2(g)+6H_2O(g)

<u>Initial:</u>        0.0280        0.0120

<u>At eqllm:</u>    0.0280-4x   0.0120-3x   2x       6x

We are given:

Equilibrium concentration of nitrogen gas = 3.00\times 10^{-3}M=0.003

Evaluating the value of 'x', we get:

\Rightarrow 2x=0.003\\\\\Rightarrow x=0.0015M

Now, equilibrium concentration of ammonia = 0.0280-4x=[0.0280-(4\times 0.0015)]=0.022M

Equilibrium concentration of oxygen gas = 0.0120-3x=[0.0120-(3\times 0.0015)]=0.0075M

Equilibrium concentration of water = 6x=(6\times 0.0015)]=0.009M

The expression of K_{eq} for the above reaction follows:

K_{eq}=\frac{[H_2O]^6\times [N_2]^2}{[NH_3]^4\times [O_2]^3}

Putting values in above expression, we get:

K_{eq}=\frac{(0.009)^6\times (0.003)^2}{(0.022)^4\times (0.0075)^3}\\\\K_{eq}=4.84\times 10^{-5}

Hence, the value of K_{eq} is 4.84\times 10^{-5}

4 0
3 years ago
Other questions:
  • (a) How many stereoisomers are possible for 4-methyl-1,2-cyclohexanediol? ___ (b) Name the stereoisomers formed by oxidation of
    13·1 answer
  • Explain the resonance structures for the sulfite ion, SO32_.
    12·1 answer
  • The table provides the number of valence electrons for each of the two atoms that form an ionic and a covalent compound. Which o
    6·1 answer
  • Which of the following conditions must be met for a volume ratio to be created from a balanced chemical equation?
    12·2 answers
  • What will mostly happen if two bromine atoms bond toghether
    7·2 answers
  • The interaction of the skeletal and muscular systems to create movement and locomotion is regulated by which organ system?
    11·1 answer
  • When classified, all living things have
    13·1 answer
  • What is fake love ??????(|_|)<br>​
    14·1 answer
  • Using complete sentences, explain how to predict the products and balance the reaction for the combustion of butane.
    9·1 answer
  • How many moles are there in 15.0 grams of SiO2
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!