The answer is 2................ :)
C
The high conductivity of silver does not promote its use in jewelry.
Answer:
the salt dissolves in water because of covalent bonds.
Explanation:
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B. The blue car has more kinetic energy than the red car
Total density of filled ball with nitrogen gas: 
The relationship between mass and volume can be easily determined using density; for example, the mass of a body is equal to its volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d). The ball filled with nitrogen will not float in the air because total density of filled ball is greater than the density of an air. Density of the evacuated ball D = 0.214 g/L
Density of nitrogen gas = 
Mass of the nitrogen gas : 
Learn more about Mass and Density here:
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