Water is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?
Answers
The correct option for above statement is
a.from a gas to a liquid
Explanation:
A liquid will be regenerate to a gas by heating. A gas will be regenerate into a liquid by increasing the pressure of a gas sample. A liquid will be regenerate to a gas by cooling. A gas will be regenerate into a liquid by cooling.
Explanation:
In vapor state of water, molecules are far apart from each other as they have high kinetic energy. Hence, they move rapidly from one place to another. Therefore, the molecules are far apart from each other.
Whereas when the speed of molecules slow down then gaseous (or vapor) state of water changes into liquid state. As decrease in kinetic energy of molecules will bring them closer to each other.
Hence, we can conclude that change of state that has most likely taken place is liquid state.
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Which will become completely dissociated when dissolved in water? Ammonia pyridine sulfuric acid or acetic acid
Everything on earth is made of
Water can dissolve other substances. Which factor best contributes to this property of water?A. Water is made up of ionic bonds.B. Water has weak intermolecular forces.C. Water is denser than most substances.D. Water particles are not fixed in place.
Answers
covalent bonding is when electrons are shared between two elements.
molecular polarity is a little bit complicated, but I will try to explain ;)
PCl3 is an alternation on tetrahedral molecules.
It means that P has one lone pair of electrons. This pair of electrons are only attracted to the P nuclei and thus a greater freedom of motion.
This means that their orbital is bigger and this pushes the 3 Cl atoms closer together.
The angle between each Cl now is 107 and the angle between Cls and P is greater than 107.
Now, due to this shape, and also electronegativity (Cl is more electronegative than P meaning that it tends to hog the electrons they share closer to itself), PCl3 is polar. Electrons that are shared tend to flow closer towards the Cl than the P side.
Therefore, on the Cl side of the molecule it's, more negative. On the P side, it's more positive.
In the given question, bond type for the molecule is covalent bond and molecular polarity of
is polar in nature, respectively.
Polarity is caused if it has an uneven distribution of electrons, causing one end of the molecule to be slightly positive and the other end to be slightly negative.
The bond type of is covalent. Covalent bonds form when atoms share electrons to achieve a more stable electron configuration. In
, the phosphorus atom shares three of its valence electrons with three chlorine atoms to form three covalent bonds.
The molecular polarity of is polar. In
, the three chlorine atoms exert a stronger pull on the shared electrons, causing them to be slightly negative, while the phosphorus atom is slightly positive. This creates a dipole moment, making the molecule polar.
Therefore, has covalent bonds and it is a polar molecule.
Learn more about Polarity here:
#SPJ6
2NO2 (g) --> N2 (g) + 2O2 (g)
C5H12 (g) + 8O2 (g) --> 5CO2 (g) + 6H2O (g)
2NaClO3 (s) --> 2NaCl (s) + 3O2 (g)
2Na (s) + Cl2 (g) --> 2NaCl (s)
CH3OH (l) --> CH3OH (g)
Answers
Answer:
(i) ΔS° < 0 or negative
(ii) ΔS° > 0 or positive
(iii) ΔS° > 0 or positive
(iv) ΔS° > 0 or positive
(v) ΔS° < 0 or negative
(vi) ΔS° > 0 or positive
Explanation:
Entropy is a state function and extensive property of the system.
It's the measurement of degree of randomness..
Entropy of the system decreases as follows
Gas > Liquid > Amorphous solid > Crystalline solid.
In case for chemical reaction
(i) Ba²⁺ (aq) + SO₄²⁻ (aq) --> BaSO₄ (s)
Total entropy change ΔS° < 0 or negative
During this reaction aqueous i.e liquid phase converted into solid phase.
So randomness decreases and hence entropy also decreases.
(ii) 2 NO₂ (g) --> N₂ (g) + 2 O₂ (g) ΔS° > 0 or positive
Since no. of gaseous moles increases from reactants to products.
(iii) C₅H₁₂ (g) + 8 O₂ (g) --> 5 CO₂ (g) + 6 H₂O (g) ΔS° > 0 or positive
Since no. of gaseous moles increases from reactants to products.
(iv) 2 NaClO₃ (s) --> 2 NaCl (s) + 3 O₂ (g) ΔS° > 0 or positive
Since no. of gaseous moles increases from reactants to products.
(v) 2 Na (s) + Cl₂ (g) --> 2 NaCl (s) ΔS° < 0 or negative
Since no. of gaseous moles decreases from left to right so entropy also decreases.
(vi) CH₃OH (l) --> CH₃OH (g) ΔS° > 0 or positive
Because during this phase transition Liquid to gaseous randomness increases and hence entropy also increases.
B. dissolve at the same rate in both glasses
C.dissolve faster in the tea being stirred
D. not dissolve because stirring forms colloids
Answers
Stirring helps up in the speeding up of the process of dissolving.
Other factor is temperature. As temperature increases, its rate increases.
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(B) 31
(C) 32
(D) 48
Answers
I THINK IT IS 16 BECAUSE THE ATOMIC NUMBER AND THE NUMBER OF PROTONS ARE THE SAME
Thus, the number of protons is 16
B) Platinum
C) Promethium
D) Carbon