The answer is "<span>An atomic nucleus is positively charged because it is composed of protons". An atomic nucleus actually contains nucleons which are made up of both protons and neutrons. Since neutrons are neutral or have no charge, the charge of an atomic nucleus mainly relies on the positive charge of the protons.</span>
Respuesta:
340 N/cm²
Explicación:
Paso 1: Información provista
Peso de la estructura (F): 8500 Newton
Area superficial (A): 25 cm²
Paso 2: Calcular la presión (P) ejercida por la estructura de concreto sobre su base
La presión es igual al cociente entre la fuerza ejercida y la superficie sobre la que se aplica.
P = F/A
P = 8500 N / 25 cm² = 340 N/cm²
Answer:
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Explanation:
Normally, in the neutralization reactions, that is how the reactions between and acid and a base are called, you assume additive volumes.
Additive volumes means that the <em>volume</em> of the final <em>solution</em> is equal to the sum of the separate volumes of the two solutions that are mixed.
It is not totally accurate, but it is a good approximation and for lack of additional data it is what is used.
Then, assuming additive volumes:
- Total volume of the solution = 100 mL + 250 mL = 350 mL.
The number of sodium ions is equal to the number of formula units of salt.
Where is the paragraph that we are summarizing v
