In 1 kilogram of pure water, the mass of hydrogen atoms is approximately 112 grams, or 0.112 kilograms. What is the energy equivalent of this mass in joules?
Answers
Using Einstein’s famous equation, E = mc^2
Given mass, m = 0.112 kg and knowing c = 3.0 x 10^8 m/s, energy E can be determined
E = (0.112 kg)(3.0 x 10^8 m/s)^2
= 1.008 x 10^16 J
Hope this helps
Answer:
Joules is the energy equivalent of this .
Explanation:
Mass of hydrogen atoms in 1 kg of water = 112 g= 0.112 kg
Mass and energy related together and that expression was given by the famous scientist named Albert Einstein:
E = Energy related to mass m
c = Speed of the light
m = 0.112 kg , c =
Joules is the energy equivalent of this .
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Answers
Answer: D) Petroleum Jelly
Explanation: Petroleum jelly is also known as white soft paraffin or Vaseline. It's a semi-solid mixture of hydrocarbons that can be used as a lubricant and protective ointment for dry or chapped skin. It can also be used to protect against minor cuts and burns.
Answers
The answer is:
Sublimation
The explanation:
The most state has the high volume is the gas state.
So here the answer is between vaporization and sublimation???
and when the sublimation is: the change of the material from the solid state to the gas state directly without pass to liquid state from the solid first then to the gas
and the vaporization is : The change of the material from the liquid state to the gas state by heating Ex: water vaporize at 100°
here, the answer is sublimation because the difference of volume which resulted from this process is more than the volume resulted from vaporization.
Answer: The correct answer is Option 4.
Explanation:
All these processes are the physical processes which occurs between the phases of matter.
Solid state is the phase where particles are closely arranged and the volume of this state is less.
Liquid state is the phase where particles are not closely arranged and the volume of this state is more than solid but less than gaseous state.
Gaseous state is the phase where particles are loosely arranged and this state has the largest volume.
- Deposition is the physical process in which gaseous state is converted to solid state. The volume of the substance decreases.
- Melting is the the physical process in which solid state is converted to liquid state. The volume of the substance increases.
- Vaporization is the physical process in which liquid state is converted to gaseous state. The volume of the substance increases.
- Sublimation is a physical process in which solid states is converted to gaseous state. The volume of the substance increases and in this case, the increment in volume is the maximum.
Hence, the correct answer is Option 4.
Answers
Answers
Answer:
State of matter changes.
Explanation:
Answers
Explanation:
1mm = 10^-3 micrometre
8.5 x 10^-3 mm = 8.5 x 10^-6 micrometre
When balancing the nuclear reaction, explain the following:
How does the Law of Conservation of Matter dictate what the daughter nuclide is?
How do we calculate the atomic mass and atomic number for the daughter nuclide?
Where do we look up what the new daughter nuclide element is?
Answers
1) number of protons and neutrons on both side of nuclear reaction must be the same. There are 91 protons (atomic number) and 143 neutrons (mass number - atomic number, 234 - 91 = 143 or (4-2) + (230 - 89) = 143)) on both side of reaction.
2) alphadecay is radioactive decay in whichan atomic nucleus emitsan alpha particle (heliumnucleus) and transforms into an atom with an atomicnumber that is reduced by two and mass number that is reduced by four, so atomic mass of new element is 89 (91 - 2) and mass number is 230 (234 - 4 = 230).
3) look at atomic number, element with atomic number 89 is actinium.
Final answer:
The balanced nuclear reaction is 234/91 Pa -> 4/2 He + 230/89 Ac. You calculate the atomic mass and atomic number of the daughter nuclide by subtracting the atomic mass and atomic number of the alpha particle from the parent nuclide. Then, refer to the periodic table to identify the element with the corresponding atomic number.
Explanation:
The process described in the question is a typical alpha decay nuclear process. In this reaction, a Protactinium-234 nuclide emits an alpha particle (which is a Helium nucleus) to produce a new nuclide, the daughter nuclide.
According to the Law of Conservation of Matter, the sum of the mass and atomic numbers (protons + neutrons) of the reactants must equal the sum of the mass and atomic numbers of the products. This means we can calculate the atomic number and atomic mass of the daughter nuclide. The atomic mass would be the difference: 234 - 4 = 230. The atomic number would be the difference: 91 - 2 = 89.
After that, you can identify the new element by its atomic number, 89, from a periodic table, which shows it to be Actinium (89/230 Ac).
So, the balanced nuclear reaction is: 234/91 Pa -> 4/2 He + 230/89 Ac
Learn more about Balancing Nuclear Reactions here:
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