The molarity of a 27%(v/v) aqueous ethanol solution is 4.63 M
calculation
convert 27%(v/v) to fraction = 27ml/100 ml
use density to convert 27ml to grams = 27 ml x0.79 g/ml = 21.33 g
find the number of moles of C2H6O
moles = mass/molar mass of C2H6O(46.07 g/mol)
moles is therefore = 21.33 g /46.07 g/mol =0.463 moles
find the molarity = moles /volume in liters
volume in liter = 100 ml/1000 = 0.1 L
molarity is therefore = 0.463 mole/0.1 L = 4.63 M
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Answer:
The answer is below
Explanation:
The density of an object is its mass per unit of volume. Dense objects feel very heavy for their size, while for objects with low density they are very light for their size.
Density is the ratio of mass to volume; it is given by:
Density (D) = mass (m) / volume (V)
An object sinks in water if the density of the object is greater than the density of water. While an objects floats on water if the density of the object is les than the density of water
Chemical substances can exist as solids, plasma, and gases so I guess it is none of the above.
Answer:
Ver explicacion
Explanation:
<u>a) 2,2,4-trimetilhexano</u>
En esta molecula tenemos una cadena lineal de seis carbonos. En los carbonos 1,2 y 4 tenemos grupos metilos.
<u>b) 3,6-dietil-2-metiloctano</u>
Para esta molecula tenemos una cadena lineal de 8 carbonos. En el carbono dos tenemos un grupo metilo y en los carbonos tres y seis tenemos dos grupos etilo.
<u>C) 3,5-dietil-2,8-dimetil-6-propilnonano</u>
Finalmente, para esta molecula tenemos una cadena de nueve carbonos. En los carbonos dos y ocho tenemos 2 grupos metil, en los carbonos tres y cinco tenemos 2 grupos etilo y en el carbono seis tenemos un grupo propilo.
Ver figura 1
Espero sea de ayuda!