Answer:
B). Precision.
Explanation:
During the course of measurements, two important factors are been seen to play key part which are accuracy and also precision. Precision here can reflect to the closeness of an answer towards the main value even though accuracy can show that too. Also it can show series of values been reproduced in the measurement flow; though in some cases can be a bit far from the actual value. Also its values are swen to be different because of repeatition and alsio in some cases, observational errors too.
CI2 + 2Nal ---> 2NalCI + I2
Nal = 149.9 g/mol.
NaCI = 58.5 g/mol
2 mol Nal makes 2 mol NaCI
0.29 g Nal x ( 1 mol / 149.9 g) = 0.0019 mol NaCI
00.19 mol NaCI x ( 58.5 g / 1 mol ) 0.11 g NaCI ( 2 sig figs)
You would expect to find more Hydrogen ions ( H+) when an acid dissolves in water that is because the acid added to the water increases the concentration of ( H+ ) ions. Acid dissolving in water also decreases the pH level. As to when the acid dissolves it brakes down into H+ molecules and OH- molecules.
2 H2O2 - 2 H2O+O2 - Balanced Equation and its a decomposition reaction.
With an electronegativity of 0.89, Barium requires the least amount of energy to remove its valence electrons.
