Are all metals acidic in nature and all non-metals basic? and what is the nature of their oxides?

Answers

Answer 1

Answer: no mercury is in liquid form

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Is the following chemical equation balanced?

2Na + 2H2O 2NaOH + H2

Answers

Answer: YES

Explanation: The given chemical equation can be balanced by balancing the stiochiometric number of each and every element.

This rule is in accordance with the Law of Conservation of Masses which states that the masses of the elements in any chemical equation are constant at any instant of time.

Thus the given equation can be written as

$2Na + 2H2O \rightleftharpoons 2NaOH + H2$

sure !

equation balanced:

2 Na + 2 H₂O = 2 NaOH + H₂ ( single replacement )

hope this helps!

A solution with a pH of 2.0 has a hydronium ion concentration ten times greater than a solution with a pH of(1) 1.0 (3) 3.0
(2) 0.20 (4) 20.

Answers

Answer:The correct answer is (3).

Explanation:

The pH of the solution is defined as negative logarithm of $H^+$ or hydronium ions ions in the solution.

$pH=-\log[H^+]$

$2=-\log[H^+]$

$[H^+]=0.01 M$

The pH with 10 times the concentration $H^+$ ions.

$[H^+]=10* [H^+]'$

$pH=-\log[H^+]'=-\log[(0.01)/(10)]=3$

Hence, the correct answer is (3).

The answer is (3) 3.0. The solution with a pH of 2.0 has greater concentration means the other solution has greater pH. pH=-lg[H+]. So we can get the pH of other solution is 3.

In Act IV, Scene 1, of A Midsummer Night's Dream, as the drama nears resolution, to whom does Demetrius address these lines?My love to Hermia,
Melted as the snow, seems to me now
As the remembrance of an idle gaud

Answers

Answer:

The lines were addressed to Theseus, the Duke of Athens.

Explanation:

William Shakespeare's "Midsummer Night's Dream" is a comedy that portrays the events surrounding the marriage of Theseus, the Duke of Athens and Hyppolita.

Hermia and Lysander were in love, much to the dismay of her father Egeus. Demetrius had been previously in love with Helena, Hermia's best friend. But now he's trying to marry Hermia, with the full support of Egeus. In Act IV, scene 1, the four characters Lysander, Hermia, Demetrius and Helena were all found in deep sleep. Hermia and Lysander had planned to elope and run away but was caught up by Helena who, through the magic potion, had fallen in love with Lysander. On the other hand, Demetrius had, by the same magic potion put on him by Queen Hyppolita, had fallen in love with Helena. When Egeus and Theseus arrived, they woke them up. It was then that they started explaining their situation to the Duke and Egeus.

Demetrius spoke the lines "My love to Hermia,

Melted as the snow, seems to me now

As the remembrance of an idle gaud"

to Duke Thesues describing his love for Hermia.

In Act IV, Scene 1, of A Midsummer Night's Dream, as the drama nears resolution, to whom does Demetrius address these line to Hermia

The complete combustion of ethanol, C₂H₅OH (FW = 46.0 g/mol), proceeds as follows: $C_2H_5OH(l) + 3O_2(g) \rightarrow 2CO_2(g) + 3H_2O(l)$ ; ΔH = −555 kJ What is the enthalpy change for combustion of 15.0 g of ethanol?