Answer:
Density of the object = 1.67 g/ml (≅1.7 g/ml)
Explanation:
<u>Given:</u>
Mass of the object, M = 14.01 g
Initial volume of water in the cylinder, V1 = 25.2 ml
Volume of water after the object is placed in the cylinder, V2 = 33.6 ml
<u>To determine</u>
The density D of the object
<u>Explanation:</u>
Density (D) of a substance is the mass (M) occupied by the substance in a given volume (V) i.e.
In this case:
M = 14.01 g
The volume V of the substance = V2-V1 = 33.6-25.2 = 8.4 ml
D. They all have the same number of valence electrons.
Answer:
Amount of heat released when 25.0 g of (rubbing alcohol) is combusted equal to 98.7 kJ
Explanation:
According to balanced equation (as given in problem), combustion of 2 moles of rubbing alcohol release 474.28 kJ of heat.
Molar mass of (rubbing alcohol) = 60.095 g/mol
We know, number of moles of a compound is the ratio of mass to molar mass of that compound.
So, 2 moles of (rubbing alcohol) = (rubbing alcohol) = 120.19 g of (rubbing alcohol)
So, combustion of 120.19 g of rubbing alcohol release 474.28 kJ of heat.
Hence amount of heat released when 25.0 g of (rubbing alcohol) is combusted =
Yes, because nothing has changed. The same ingredients are used and if one reaction happened in a a bag then why wouldn’t it happen in a container?