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3 years ago

List three properties of metals that nonmetals typically do not have

Chemistry

1 answer:

Law Incorporation [45]3 years ago

7 0

Conductivity, malleability, and high melting points. Hope this helps :)

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Consider the addition of NaCl to the ice-water mix in Part II. Which of the following statements is TRUE?

Sati [7]

B is correct

salt lowers the freezing point of water (colligative property) by lowering the interaction and intermolecular forces between water molecules

6 0

2 years ago

Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the pr

yuradex [85]

Explanation:

According the equation of Gibb's free energy -

∆G = ∆H -T∆S

∆G = is the change in gibb's free energy

∆H = is the change in enthalpy

T = temperature

∆S = is the change in entropy .

And , the sign of the ΔG , determines whether the reaction is Spontaneous or non Spontaneous or at equilibrium ,

i.e. ,

• ΔG < 0 , the reaction is Spontaneous

• ΔG > 0 , the reaction is non Spontaneous

• ΔG = 0 , the reaction is at equilibrium

N₂(g) + H₂(g) → N₂H₄ (g) ; ΔG⁰f = 159.3 kJ/mol

ΔG > 0 , the reaction is non Spontaneous , the reaction is not feasible in the forward direction

2Na(s) + O₂(g) → Na₂O₂ (s) ; ΔG⁰ f = − 447.7kJ/mol

ΔG < 0 , the reaction is Spontaneous , the reaction is feasible in the forward direction .

C(s) + 2S(s) → CS₂ (g) ; ΔG⁰f = 67.1 kJ/mol

ΔG > 0 , the reaction is non Spontaneous , the reaction is not feasible in the forward direction

Ca(s) + 12 O₂ (g) → CaO (s) ; ΔG⁰f = −604.0 kJ/mol

ΔG < 0 , the reaction is Spontaneous , the reaction is feasible in the forward direction .

8 0

3 years ago

Given below is the balanced equation for the combustion of decane. 2C10H22 (l) + 31O2 (g) --> 20CO2 (g) + 22H2O (g) What is t

Aleks [24]

Answer: The ratio of carbon dioxide molecules to oxygen molecules is 20 :31

Explanation:

Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced combustion reaction is,:

$2C_{10}H_{22}(l)+31O_2(g)\rightarrow 20CO_2(g)+22H_2O(g)$

Thus the ratio of carbon dioxide molecules to oxygen molecules is 20 : 31

3 0

2 years ago

How many atoms are contained in 5.77 grams of aluminum? Express your answer in exponential notation (Ex: 6.02*1023 would be ente

bagirrra123 [75]

Answer:

5.09

Explanation:

6 0

2 years ago

U ever get an answer

den301095 [7]

Yesn’t. they are either wrong or links

6 0

2 years ago