The surface area would be 25cm, while the vloume would be
or length×width×height
125cm cubed
The metal which react with concentrated sodium hydroxide to produce hydrogen gas is ALUMINIUM.
The equation of the reaction is as follows:
2AL + 2NaOH + 2H2O = 2 NaALO2 + 3H.
The product formed is called sodium aluminate. The reaction is an exothermic reaction and is accompany by the evolution of hydrogen gas.
<u>Answer:</u> The molality of 
solution is 0.782 m
<u>Explanation:</u>
Molality is defined as the amount of solute expressed in the number of moles present per kilogram of solvent. The units of molarity are mol/kg. The formula used to calculate molality:
.....(1)
Given values:
Moles of = 0.395 mol
Mass of solvent (water) = 0.505 kg
Putting values in equation 1, we get:
Hence, the molality of solution is 0.782 m
Ion is an atom or molecule with a net electric charge due to loss or gain of one or more electrons.
Answer:inform the lab instructor and get instructions
Explanation:
If you come across a chemical in the laboratory which has been wrongly labelled, do not be quick to dilute it or take any further action. The laboratory instructor who may have prepared the reagent himself or has better knowledge about the reagent should be contacted immediately so that he/she can give you instructions about what to do with the wrongly labelled reagent.
