The two roots of this functions are the exact roots and one is an imaginary root. The -2 is the root of a negative number -16 because if you compute the -2 on its 3rd power you come up -16, the 2 is the root of 16 and the 4+i contains a imaginary number that is why it is an imaginary root
To find the concentration, use the following formula--> molarity= moles/ liters
liters= 650.0 mL= 0.6500 Liters
we need to convert the grams to moles using the molar mass of NH3
molar mass of NH3 = 14.0 + (3 x 1.01)= 17.03 g/ mol
25.0 g NH3 ( 1 mol/ 17.03 grams)= 1.47 mol
concentration= 1.47 mol/ 0.6500 Liters= 2.26 M
The statement “Ionic crystals are extremely malleable
because they contain a positively charged metal ion” is false. Ionic crystals
are composed of positive and negative ions that are combined so that the
numbers of positive and negative charges are equal.
The neutralization reaction would be:
HCl + NaOH --> NaCl + H₂O
Next, determine the equivalent moles of HCl from the given amount of titrant. However, there is a missing information. You should know the molarity of the NaOH to be able to solve this. Suppose, the concentration is 0.1 M NaOH.
0.1 M NaOH * 0.3255 L = 0.03255 mol NaOH
Since, the molar ratio is 1:1, then that is also equivalent to 0.03255 mol HCl. The molarity would then be:
Molarity = 0.03255 mol/0.25 = <em>0.1302 M HCl</em>
Answer:
By adding the solute in to solution boiling point is increased while freezing point is decreased.
Explanation:
When solute in added into the solvent the boiling point of solvent increases for example,
Water is boiled at 100 °C, when sodium chloride is added its boiling point increased. Ions of salt interact with solvent and prevent the water molecules to escape from the surface and form gas molecules. In order to make it boiled solution must be heated above 100 °C.
But there is different case with freezing point. Freezing point is the state in which substance converted into the solid. At given temperature when solute is added into the solvent it prevent the formation of solid. It required time to decrease the temperature first and as the temperature is decreases solid is formed.