Answer:
(x + 2)(x + 2)
Explanation:
You need 2 numbers that times to give 4 and add to give 4. So 2 and 2.
Answer:
B
Explanation:
Molarity measures the strength of a solution. Remember, a solution is made up of two parts: the solvent (which does the dissolving) and the solute (the substance that is dissolved). The more solute there is, the higher the concentrate and therefore the higher the molarity of the solution. Thus B is the answer
Metals higher in the reactivity series may displace least reactive metals from their salts. For example sodium is reactive than copper therefore it would displace copper ions from its salt. In this case, Sodium is more reactive than Magnesium and therefore magnesium cannot displace sodium ions from sodium sulfate , therefore, no reaction will take place.