The discoverer of the electron was Thomson. The model of the atom that is missing from the set is the Thomson’s model. J. J. Thomson portrayed his atom model to look like a plum pudding. In his model, he described that an atom is composed mainly of electrons.
Answer: lower freezing point and a higher boiling point than water
Explanation:
Addition of a non volatile solute leads to elevation in boiling point and depression in freezing point.
This increase in boiling point arises because particles of the non-volatile solute occupy the surface of solution due to which solvent particles can not escape out of the solution. Hence, high amount of heat is required for the solute particles to escape out of the solution. Therefore, an increase in boiling point will occur.
Also as vapor pressure of solution becomes less, the freezing point gets depressed as freezing point is the temperature at which vapor pressure of solid becomes equal to the vapor pressure of solution.
Thus at standard pressure when NaCl is added to water,the solution will have a lower freezing point and a higher boiling point than water
Answer:
Explanation:
Catalysis is a process that accelerates chemical reactions due to molecules called catalysts, which provide ways to reach products that require less energy.
A catalyst intervenes in the reaction mechanism, but is not consumed. This means that the catalyst participates in some stage of the reaction, but then regenerates.
In addition, a catalyst is used in a small amount: a minimum mole percentage, with respect to reagents, is usually required to observe an increase in velocity.
There are three types of catalysis:
The absence of a catalyst can make the reaction so slow that it never occurs. Therefore, when the catalyst of a reaction is removed, the reaction may stop.
the number of populations in a specific area
the number of organisms in a population
the number of organisms an ecosystem can support
The answer is: number of organisms an ecosystem can support.
C₂H8 is Dimethocain-M. In C₂H₈ two atoms of carbon are present. Combustion of 6.40 mole C₂H₈ produced 12.8 moles of CO₂.
Combustion reaction refers to burning of compound in presence of oxygen. The reaction is accompanied by heat and light. One mole of burned carbon produced one mole of CO₂ gas.
Combustion is a chemical reaction between substances ,usually including oxygen and usually accomplished by the generation of heat and light.
Here we see that in C₂H₈ there are there are two carbons present then 2 moles of CO₂ gas is produced i.e. 2 × 6.40 = 12.8 moles.
Hence, 12.8 moles of CO₂ produced in combustion of 6.40 mole C₂H₈.
To learn more about combustion refer the link below;
#SPJ2
Answer:
Nitrogen atom (neutral)
- Atomic number: 7
- Atomic mass: 16
- #protons (+): 7
- #neutrons: 9 (Atomic mass - Atomic number)
- #electrons (-): 7
- Overall charge: 0 (neutral atom has equal number of protons and electrons)
- Electron configuration: 1s² 2s² 2p³ (two electrons in the 1s orbital, two electrons in the 2s orbital, and three electrons in the 2p orbital)
Nitrogen ion
- Atomic number: 7
- Atomic mass: 16
- #protons (+): 7
- #neutrons: 9 (Atomic mass - Atomic number)
- #electrons (-): 10 (one additional electron)
- Overall charge: -1 (negative ion, gained one electron)
- Electron configuration: 1s² 2s² 2p⁶ (two electrons in the 1s orbital, two electrons in the 2s orbital, and six electrons in the 2p orbital)
The atomic mass of #1 (neutral nitrogen atom) and #3 (nitrogen isotope) are different because they have different numbers of neutrons. The neutral nitrogen atom has 9 neutrons, while the nitrogen isotope has 9 neutrons. The electron configuration of #1 (neutral nitrogen atom) and #2 (nitrogen ion) is different because the nitrogen ion has gained one extra electron. The extra electron occupies an available space in the 2p orbital, resulting in a different electron configuration.
Diagram #2 is considered an ion because it has a different number of electrons than the neutral nitrogen atom. The nitrogen ion in diagram #2 has 10 electrons, one more than the neutral nitrogen atom. It is a negatively charged ion (-1) because it has gained one electron. This type of ion is called a nitride ion. The number at the end of the nitrogen isotope's electron configuration represents the number of electrons in the outermost energy level or shell. For nitrogen, the number at the end is 5, indicating that it has 5 electrons in its outermost shell.
Explanation:
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Answer:
Hydrocarbon being non polar are soluble only in non polar solvent.
Explanation:
Hydrocarbon molecules either have very little polarity or they do not have polarity at all, this is because of absence of electro-negative atoms in their molecular structure. Due to this their solubility is also affected. The solubility of a compound depends on its polarity as it can dissolve in a polar solvent only when it is polar or else they are soluble in non-polar solvent