A. -20kj
Explanation:
The reaction is exothermic
therefore enthalpy = 20 - 40 = -20
Answer:
4.78 g/cm³
Explanation:
Density is expressed as mass per unit volume:
D = m/V
D = (24.02 g) / (5.02 mL) = 4.78 g/mL
The density should be expressed in g/cm³, so mL must be converted to cm³. The conversion ratio is 1 mL = 1 cm³.
(4.78 g/mL)(1 mL/1 cm³) = 4.78 g/cm³
Answer:
The position of an equilibrium always shifts in such a direction as to relieve a stress applied to the system. - <u>Le Chatelier's principle</u>
A molecule that donates a proton when it encounters a proton acceptor. - <u>Bronsted-Lowry acid</u>
Occurs when a reaction involving an acid and its conjugate base is combined with a second reaction involving a base and its conjugate acid. - <u>Neutralization</u>
It ionizes completely when dissolved in water. - <u>Strong acid</u>
The shift in the position of equilibrium caused by the addition of a participating ion. - <u>Common ion effect</u>
It only partially ionizes when dissolved in water. - <u>Weak electrolyte</u>
It is capable of acting as either an acid or a base depending upon the solute. - <u>Amphoteric solvent</u>
The act of self-ionization of a solvent to produce both a conjugate acid and a conjugate base. - <u>autoprotolysis </u>
A chemical species that bears both positive and negative charges. - <u>zwitter ion</u>
Answer:
magnesium (Mg)
Explanation:
Both are in group 2 and because of that share the same chemical properties.
