Answer:
muchos de los cambios que observa en el mundo que lo rodea son causados por reacciones químicas. los ejemplos incluyen dejar cambiar de color, cocinar alimentos y limpiarse. conocer algo de química puede ayudarlo a tomar decisiones cotidianas que afectan su vida.
Explanation:
Espero que esto ayude a marcar el MÁS CEREBRAL !!!
B ) the oceanic and continental crust only
Explanation:
Option first is the correct one
A normal IV bag contains a saline solution. This means that it contains water mixed with sodium chloride though sometimes it may be water mixed with dextrose. Both of these are additives used to normalize tonicity.
Tonicity is a measurement of osmotic pressure. What this means is that it measures how likely it is for water to be drawn to it and is based on the concentration of solutes. There are 3 measurements for tonicity
- Hypertonic
- Hypotonic
- Isotonic
These measurements tell us whether water is likely to be drawn in, repelled, or not move at all. This will depend on the concentration of solutes and water on the inside and outside of a cell. If a patient is given normal water, the water will dissolve the solutes outside of a cell and cause a pressure gradient that will cause water to be drawn into a cell until it inevitably explodes. This death of the blood cells is known as hemolysis. To avoid this, additives like Dextrose or sodium chloride are added, to equalize tonicity.
Though dextrose is often used, the most common solution for an IV bag is the saline solution made from water and sodium chloride (salt). The addition of additives like salt or dextrose (a type of sugar) is important in order to normalize tonicity and avoid hemolysis.
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Because gas particles are very far from each other so the amount of space between them can easily change therefore doesn’t have a fixed shape and since the particles are always in motion and try to fill there container gas doesn’t have a fixed volume either