The statement that correctly explains the polarity of the water molecule is B. Oxygen end has a partial negative charge and the hydrogen end has a partial positive charge.
Hey there!
V/V % = ( volume of solute ( mL ) / volume solution ) * 100
volume solute = 25 mL acetone
Volume solvent = 75 mL water
So :
v/v = 25
------------ * 100
25 + 75
v/v = ( 25 / 100 ) * 100
v/ v = 25%
hope this helps!
Answer :
(a) The speed in Km/hr is,
(b) The speed in mi/min is,
Solution :
The speed of light =
(a) Convert speed of light from m/s to Km/hr
conversions used :
(1 Km = 1000 m)
(1 hr = 3600 sec)
(b) Convert speed of light from m/s to mi/min
conversions used :
Here we have to identify a piece of iron by its chemical property.
There are several chemical properties of iron for its identification but the simplest way to identify one of the renowned chemical property of iron is the formation of rust on iron in presence of water.
The iron in presence of water forms different types of iron oxides like hydrated Iron (III) oxide [Fe₂O₃.nH₂O], Iron (III) oxide-hydroxide [FeO(OH). Fe(OH)₃].
The rust is brown in color and forms only by keeping the iron piece in atmosphere. Although the humidity has an effect on the formation. The more humid the atmosphere there will be more chance to form rust on iron rod.