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Bad White [126]
3 years ago
9

Which elements are represented by the symbols S and Na?

Chemistry
1 answer:
Degger [83]3 years ago
4 0
Sulfur and sodium are those two elements
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What evidence led scientists to develop the theory of plate tectonics
hoa [83]
Earth quake and volcanoes. 
I hope i have answerd your question.
Your welcome.
5 0
3 years ago
Cuál o cuáles de las siguientes características son correctas para la mayoría de los compuestos del carbono?
garik1379 [7]

Answer:

Todas son correctas

Explanation:

I) Los compuestos del carbono son solubles en disolventes no polares como el hexano, benceno, éter, etc. <em>VERDADERO. </em>La mayoría de los compuestos de carbono son apolares, y basados en la regla: Similar disuelve similar, podemos presumir que la mayoría de compuestos de carbono se disuelven en solventes no polares.

II) Los compuestos del carbono generalmente presentan puntos de fusión y de ebullición bajos. <em>VERDADERO. </em>Al ser sustancias apolares, sus fuerzas electrostáticas son bajas. De la misma manera, como su masa atómica es pequeña, las fuerzas de Van der Waals son despreciables haciendo que sus puntos de fusión y ebullición sean bajos respecto a sustancias de estrucutra similar.

III) La gran mayoría de los compuestos del carbono son combustibles, sean estos, gaseosos, líquidos o sólidos. <em>VERDADERO. </em>Los gases (Como el gas natural) son combustibles usados para cocina. Los líquidos (Como la gasolina) son combustibles y bastante inflamables. Los sólidos (Como la madera) se usan como combustibles para hacer asados o son el combustible en incendios forestales.

IV) El enlace covalente es característico de los compuestos del carbono. <em>VERDADERO. </em>La polaridad del carbono es neutral haciendo que la mayoría de los enlaces que forma sean covalentes.

<h3>Todas son correctas </h3>

5 0
3 years ago
What is the [H+] concentration of a solution with a pH of 3.78
lianna [129]

Answer:

[H+] = 1.66 x 10^{-4}

Explanation:

To find the [H+] concentration of a solution, we can use the formula:

[H+] = 10^{-pH}

Let's plug in the pH.

[H+] = 10^{-3.78}

Evaluate the exponent.

[H+] = 1.66 x 10^{-4}

Hope this helps!

6 0
3 years ago
What is the molecular weight of potassium ( k2so4)​
WINSTONCH [101]

Answer:

174.259 g/mol

Explanation:

The molecular weight of potassium (K2so4) is 174.259 g/mol .

<em>Hope </em><em>it </em><em>is </em><em>helpful</em><em> to</em><em> you</em>

5 0
3 years ago
Consider the following reaction where Kp = 2.01 at 500 K: PCl3(g) + Cl2(g) PCl5(g) If the three gases are mixed in a rigid conta
alekssr [168]

Explanation:

Kp remains constant (if T=const.).

If Q<Kp, more reactants are consumed (the direct reaction is in progress). If Q>Kp the reverse reaction is in progress (the products are consumed).

1. A reaction will occur in which PCl5 (g) is consumed

A. If Kp > Qp  then 1,2,3 and 5 are F.  4 is T

B. Kc > Qc then 1,3 are T. 2,4,5 are F.

C. Qp > Kp then 1.3.4 are T. 2,5 are F.

7 0
4 years ago
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