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Kruka [31]
2 years ago
6

In which item is energy is stored in the form of gravitail energy

Chemistry
1 answer:
Black_prince [1.1K]2 years ago
8 0
Gravitational energy is stored potential energy in an object based on its high position compared to a lower position. A pendulum converts potential energy from gravity into kinetic energy and back again.

Hope that helps
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Sodium metal reacts with water to produce hydrogen gas.
ad-work [718]

Answer:

Q1. D) A single replacement reaction takes place because sodium is more reactive than hydrogen.

Explanation: 2Na+2H_2O\rightarrow 2NaOH+H_2 Sodium metal reacts with water to givesodium hydroxide and hydrogen gas. A single replacement reaction takes place because sodium is more reactive than hydrogen.  

Sodium easily lose electrons than hydrogen and get oxidized to Na^+ and H^+ get reduced to give H_2 .

Q2. B) It is a single replacement reaction, and the cations in the two ionic compounds are different.

Explanation: 3Na+AlCl_3\rightarrow 3NaCl+Al where Sodium is a metal and AlCl_3 is an ionic compound. Na being more reactive than Al, displaces it from its salt solution.

Q3. D) Zn+H_2SO_4\rightarrow ZnSO_4+H_2

Explanation: A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus zinc can easily lose electrons as compared to hydrogen and result in the formation of zinc sulfate and hydrogen.

Q4. False

Zn+CaCl_2\rightarrowno reaction

Explanation: As zinc lies lower in reactivity series, it is less reactive than calcium. It will not be able to displace calcium from its salt and hence no reaction occur. Thus the given statement is false.

Q5. False

Explanation: A double displacement reaction is one in which exchange of ions take place.  Thus an element replaces another element and not same element.

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Thus one element should be different from another element.

Q6. A)Na_3PO_4+3KOH\rightarrow  3NaOH+K_3PO_4, because K retains the same charge throughout the reaction

Explanation: A balanced chemical reaction is one in which the number of atoms on both sides of a chemical equation are same. Also K has an oxidation state or charge of +1 in KOH as well as K_3PO_4


5 0
3 years ago
Read 2 more answers
Part a the disproportionation of mn2+(aq) to mn(s) and mno2(s) in acid solution at 25 ∘c. calculate δg∘rxn.
ollegr [7]

Answer:

ΔG^{o} = -461198.3 J

Explanation:

Gibbs free energy is defined as the energy associated with a given chemical reaction which can be used to do work. Firstly, we need to figure out the chemical equation for the given problem. For the given problem, the chemical equation is:

Mn^{2+} _{(aq)} + 2e^{-}⇒Mn_{(s)}      E^{o} = -1.18 V

Mn^{2+} _{(aq)} + H_{2}O ⇒MnO_{2(s)} +4H^{+} + 2e^{-}E^{o} = -1.21 V

The addition of the two E^{o} gives the E_{cell} of the equation, i.e. -1.18-1.21 = -2.39 V.

Then, using the equation for ΔG^{o}, we have:

ΔG^{o} = n*F*E^{o} = 2*96485*-2.39 = -461198.3 J

4 0
3 years ago
During chemical cycling, inorganic nutrients are typically returned to the soil by:.
11Alexandr11 [23.1K]
Decomposers. They help break apart and digest dead matter and put those nutrients back into the soil, making them available. Happy to help!
3 0
2 years ago
What else can the copper react with?
Jet001 [13]
Copper oxidizes in moist air
2Cu + CO₂ + O₂ + H₂O = (CuOH)₂CO₃

copper reacts with concentrated acids, for example, with nitric acid
Cu + 4HNO₃ = Cu(NO₃)₂ + 2NO₂ + 2H₂O

copper reacts with chlorine
Cu + Cl₂ = CuCl₂

copper reacts with oxygen when heated
2Cu + O₂ = 2CuO
6 0
2 years ago
Read 2 more answers
What is one advantage the United States has over Canada for maintaining a diversified economy?
r-ruslan [8.4K]

Answer: The U.S. has a greater gold resource

Explanation: Canada has 3,500 tons while the U.S. has 6,000

8 0
3 years ago
Read 2 more answers
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