Una solución acuosa de ácido nítrico tiene una densidad de 1.42 g/mL y una concentración molar de 16 M. (Asuma que está trabajando con 1 L de solución)
a. Calcule el porcentaje en masa de HNO3 en la solución
b. Calcule la molalidad de HNO3 en la solución

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.