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Alex73 [517]
3 years ago
5

Whats the longest word in history?

Chemistry
1 answer:
I am Lyosha [343]3 years ago
6 0

Answer:

Pneumonoultramicroscopicsilicovolcanoconiosis

Explanation:

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Use the born-haber cycle to calculate the standard enthalpy of formation for SRI2 (strontium iodide)
mote1985 [20]

Answer:

Born-Haber Process - "Born-Haber process applies Hess's law to calculate the lattice enthalpy(<em>this is a thermodynamic term which equals to the total heat content of a system</em>), by comparing the standard enthalpy change of formation of ionic compound (from the elements) to the enthalpy required to make gaseous ions from the elements".

Explanation:

Now the calculations done for SRI2 are as follows:

  • Enthalpy of Sublimation of Sr(s)= 164 kJ per mol,
  • 1st ionization energy of Sr(g)=549 kJ per mol,
  • 2nd ionization energy of Sr(g)=1064 kJ per mol,
  • Enthalpy dissociation energy of I2(s)= 62.4 kJ per mol,
  • Bond dissociation energy of I2(g)= 152.55 kJ per mol,
  • 1st electron affinity of I(g)= -295.15 kJ per mol,
  • Lattice energy of SrI2(s)=-1959.75 kJ per mol.

Note - the terms mentioned in the brackets are as, S- solid form, g- Gaseous form.

8 0
3 years ago
What type of isotope undergoes radioactive decay?
Rudik [331]

Answer:

It should be one that has an unstable nucleus

Explanation:

The forces that normally hold the nucleus together sometimes can't do the job, and so the nucleus breaks apart, undergoing nuclear decay. All elements with 84 or more protons are unstable; they eventually undergo decay. Other isotopes with fewer protons in their nucleus are also radioactive.

I hope this helps :p

4 0
3 years ago
URGENT - This is not really specific but I have a chemistry test really soon and I still don't understand how to balance chemica
UkoKoshka [18]

Answer:

Explanation:

- the key thing to note is that balancing is simply having equal amounts of all the compounds in an equation

1) look at how many there are in each compound i.e. cl2 has 2 and HCl has 1 hydrogen and 1 chlorine

2) balance the reactants with its products

this is done by adding a number in front of a compound

e.g. ch4 + cl2 = ccl4 + hcl

balanced: ch4 + 4cl2 = ccl4 + 4hcl

this is because there isnt equal elements of the compounds

8 0
3 years ago
The reaction energy of a reaction is the amount of energy released by the reaction. It is found by determining the difference in
MArishka [77]

correct answer is 7.8026035971 x 10^(-13) jo

Use Energy Conservation. By ``alpha decay converts'', we mean that the parent particle turns into an alpha particle and daughter particles. Adding the mass of the alpha and daughter radon, we get

m = 4.00260 u + 222.01757 u = 226.02017 u .

The parent had a mass of 226.02540 u, so clearly some mass has gone somewhere. The amount of the missing mass is

Delta m = 226.02540 u - 226.02017 u = 0.00523 u ,

which is equivalent to an energy change of

Delta E = (0.00523 u)×(931.5 Me V/1u)

Delta E = 4.87 Me V

Converting  4.87 Me V to Joules

1 joule [J] = 6241506363094 mega-electrón voltio [Me V]

4 mega-electrón voltio = 6.40870932 x 10^(-13) joule

4.87 mega-electrón voltio = 7.8026035971 x 10^(-13) joule

What is energy conservation?

Energy conservation is the decision and practice of using less energy. Turning off the light when you leave the room, unplugging appliances when they're not in use and walking instead of driving are all examples of energy conservation.

Why is energy conservation important?

When you limit your energy usage, you lower your impact on the environment. The longer we go without making significant changes, the greater the threat of global warming and climate change become to our daily lives. When we burn fossil fuels, they create an incredible amount of greenhouse gas emissions.

Learn more about energy conservation:

brainly.com/question/12306849

#SPJ4

8 0
1 year ago
How did agre use a simple osmosis experiment to prove the function of aquaporin?
ElenaW [278]
<span>Agre tested his hypothesis in a simple experiment where he compared cells which contained the protein in question with cells which did not have it. The trials were ran with artificial cells, liposomes, which are a type of soap bubble. He found that the liposomes became permeable if the protein was planted inside of the membrane.</span>
6 0
3 years ago
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