The answer is true. Water does have one the highest specific heat capacities.
Answer:
This is polar
Explanation:
If the arrows are of different lengths, and if they do not balance each other, the molecule is polar.
If the arrangement is asymmetrical, the molecule is polar.
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Neutron capture reactions.
Isotopes of the same element have the same number of protons in each nucleus. However, their nucleus differ in the number of neutrons. Adding one or more neutrons to a nucleus will converts it to a different isotope of the same element.
Neutrons can be produced with a particle accelerator. The researcher might aim fast moving alpha particles from the accelerator at a beryllium Be target.
Doing so will convert beryllium-9 to carbon-12 and release one neutron.
The neutron produced in this process moves very fast ("fast neutrons"). It might knock protons or alpha particles off the target nucleus. This is undesirable since the nucleus will have a change in its proton number. It will end up belonging to a different element.
The researcher should reduce the speed of those neutrons. Passing neutrons through moderators greatly reduces their speed. Moderators are materials that are rich in light nuclei. They remove the energy of neutrons as the two collide. Examples of moderators are heavy water (D₂O) and graphite (carbon). Slow neutrons are easier to capture than fast-moving ones. Combining those slow-moving neutrons to the source isotope will likely produce a different isotope of the same element.
Vitz, Ed. et. al, "19.5: Neutron Bombardment", ChemPRIME (Moore et al.), Libretexts Chemistry, 2017
Answer:
D. BY ADDING OR REMOVING NEUTRONS.
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Explanation:
Answer:
The pressure changes from 2.50 atm to 2.58 atm (an increase of approximately 0.08 atm) when the gas is heated from 30.0°C to 40.0°C.
Explanation:
As the given volume of gas is constant, we can use Gay-Lussac's law to solve this problem as it relates pressure to temperature.
where:
First, we need to convert the given temperatures from Celsius to Kelvin by adding 273.15:
Therefore, the values to substitute into the equation are:
As we are solving for the final pressure, rearrange the equation to isolate P₂:
Substitute the values into the equation and solve forP₂:
Therefore, the pressure changes from 2.50 atm to 2.58 atm (an increase of approximately 0.08 atm) when the gas is heated from 30.0°C to 40.0°C.
An atom of element X will have an electron configuration of 2-8-18-7. Therefore, option (4) is correct.
Those chemical elements present in the same group of the periodic table have similar chemical properties. Elements are placed in vertical columns that have the same number of electrons in their valence shell and identical chemical properties.
On the periodic table, the vertical columns are known as groups because of their identical chemical behavior. All the chemical elements of a group (1 to 18) have similar chemical properties.
The atomic number of chlorine is 17 and the distribution of electrons in its shells is 2, 8, 7. So, chlorine exhibits seven electrons in its outermost shell. Therefore, the atom which will carry seven electrons in its outermost shell will have identical chemical properties as that of chlorine.
Hence, out of the four options, the atom with electronic configuration 2-8-18-7 will have similar chemical properties as those of chlorine.
Learn more about elements with similar chemical properties, here:
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Answer: Option (4) is the correct answer.
Explanation:
Chemical properties depend on the number of electrons present in the valence shell.
Atomic number of chlorine is 17 and electrons present in its shells are distributed as 2, 8, 7. So, there are 7 electrons present in the outermost shell.
Therefore, the atom which will also have 7 electrons present in its outermost shell or valence shell will have similar chemical properties as that of chlorine.
Hence, out of the given options atom with electronic configuration 2-8-18-7 will have similar chemical properties.
The bottle left outside will have the same vapor pressure as the bottle inside the room because they both contain water.
The bottle left outside will have higher vapor pressure than the bottle from the room.
No change to either bottle.