How can an iceberg (temperature=0 Celsius) have more energy than a burning match head (temperature=230 Celsius)?
Answers
A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.
What is Kinetic energy ?
Kinetic energy is a form of energy in which an object possesses due to its motion. The kinetic energy of an object is depends up on both the velocity and mass. The S.I unit of Kinetic energy is Joules.
The temperature of burning match head is given 230 degree Celsius and temperature of iceberg is given 0 degree Celsius. A burning match head has a higher temperature than the iceberg due to average molecule in the burning match head moves faster than the average molecule in the iceberg.
Thus, from above conclusion we can say that A burning match head whose temperature is 230 degree Celsius have more energy than an iceberg whose temperature is 0 degree Celsius.
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Related Questions
All chemical reactions use reactants in a specific proportion or stoichiometry to form products. The __________ reactant regulates the amount of products produced. A) excess B) limiting C) proportional D) stoichiometric
6 CO2 + 6 H2O + Energy--> C6H12O6 + 6 O2 is the chemical formula for:A: abiogenesis B: Respiration C: Photosynthesis D: Homostasis
A 22.5 g sample of a metal is heated to 65.00 °C and added to 25.00 g of water (c = 4.184 J/g °C) in a calorimeter. The water temperature rises from 25.55 °C to 35.25 °C. What is the specific heat capacity of the metal?
Criteria for evaluating alternative solutions includes all of the following except :a. Appropriatenessb. Predictionc. Adequacyd. Efficiency
B. eukaryotic
C. archaean
D. cyanobacteria
Answers
Answer: The correct answer is Option B.
Explanation:
Prokaryotic cells are defined as the cells which does not contain any membrane bound organelles nor they contain nucleus. They are single-celled organisms. For Example: Bacteria, archaea
Eukaryotic cells are defined as the cells which contain membrane-bound organelles. These cells also contain nucleus and also they have DNA which is contained in the nucleus. They can be single-celled or multi-celled organisms. For Example: Animal cells, Plant cells.
Archaea and cyanobacteria are the examples of prokaryotic cells and thus, will not contain nucleus or any membrane-bound organelles.
Hence, the correct answer is Option B.
The cells contain a nucleus and membrane-bound organelles is eukaryotic.
Option B is correct.
How do we explain?
Eukaryotic cells are the most complex cells and contain a nucleus and membrane-bound organelles. Prokaryotic cells, archaea, and cyanobacteria do not have a nucleus or membrane-bound organelles.
The cells that contain a nucleus and membrane-bound organelles are eukaryotic cells \Prokaryotic cells including bacteria and archaea lack a nucleus and membrane-bound organelles. Cyanobacteria are a type of prokaryotic bacteria, so they also lack a nucleus and membrane-bound organelles.
Therefore option B is correct
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Answers
Answer:
If you change the number of protons an atom has, it becomes a different element. If you change the number of nutrons it has, it becomes a different isotope.
Explanation:
Mg(s) + N2(g) --> Mg3N2(s)
51 Balance the equation in your answer booklet for the reaction between magnesium and nitrogen, using the smallest whole-number coefficients. [1]
52 In the ground state, which noble gas has atoms with the same electron configuration as a magnesium ion? [1]
53 Explain, in terms of electrons, why an atom of the metal in this reaction forms an ion that has a smaller radius than its atom. [1]
Answers
51)
Mg(s) + N₂(g) --> Mg₃N₂(s)
There is one Mg atom on the reactant side and three Mg atoms on the product side. So to balance the number of Mg on both side of the equation a coefficient 3 is placed before Mg on the reactant side. The number of N atoms are two on both side of the reaction. Therefore the balanced chemical equation is,
2Mg(s) + N₂(g) --> Mg₃N₂(s)
52)
The electron configuration of Mg is 1s²2s²2p⁶3s² or [Ne]3s²
The electron configuration of Mg²⁺ is 1s²2s²2p⁶ or [Ne]
The electron configuration of Ne is 1s²2s²2p⁶
Ne he same electron configuration as a Mg²⁺ ion.
53)
Mg has its valence electron in the 3s shell, but Mg²⁺ has no electron in the 3s shell, the valence electron in Mg²⁺is in the 2p orbital. The size of the 2 shell is smaller than the 3 shell. Hence, Mg²⁺ is smaller than Mg.
The balanced equation for the reaction between magnesium and nitrogen is 3Mg(s) + N2(g) -> Mg3N2(s). Neon has atoms with the same electron configuration as a magnesium ion. When an atom of a metal forms an ion, it loses electrons and has a smaller radius.
51. The balanced equation for the reaction between magnesium and nitrogen is:
3Mg(s) + N2(g) → Mg3N2(s)
52. The magnesium ion has the same electron configuration as a neon atom because both have the electron configuration of 2,8. Therefore, neon is the noble gas with atoms having the same electron configuration as a magnesium ion.
53. When an atom of a metal forms an ion, it loses one or more electrons to achieve a stable electron configuration. This results in a decrease in the size of the ion compared to the neutral atom. The loss of electrons reduces the repulsion between the remaining electrons, causing the ion to have a smaller radius.
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Answers
ions are of two types
1. cations ( positive ion )
2. anion (negative ion )
for e.g Al³+
In ion is an atom who lose or gain electrons. When it lose an electron, the number of protons will be higher than then number of electrons in an normal atom, and will be called positive ion or cation.
Example: The Aluminium lose 3 electrons. So the ion of Al will be
Ionization equation:
And When an ion gain electrons, the number of electrons will be higher than the number of protons in an normal atom, and will be called negative ion, or Anion..
Example: the Chloride gain 1 electron. So the ion of Cl is
Ionization equation:
HOPE THIS HELPS :D
Answers
Answer:
0.208333 M
Explanation:
M2=M1V1/V2=(0.25 M)(125mL)/(125mL+25 mL)= 0.208333 M
Answers
Alloys are used because of their strength, resistance to corrosion, appealing appearance and ability to be easily formed.
What is corrosion resistance?
Corrosion resistance: Alloys are resistant to corrosion and rust, which makes them an ideal material for the outer casing of ballpoint pens.
The pen's exterior can be exposed to air and moisture, but the alloy will not corrode or rust, ensuring that the pen remains in good condition for a longer period.
Durability: Alloys are typically stronger and more durable than pure metals, which makes them ideal for use in ballpoint pens.
Ballpoint pens undergo a lot of wear and tear during regular use, such as being dropped, knocked around, or exposed to high temperatures. Using an alloy ensures that the pen will not bend, break, or become deformed easily, which prolongs the life of the pen.
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