1.matter is made up of small particles
2.particles of matter are in constant random motion
Explanation:
1.Particles eg of salt can be crashed into smaller particles 2.When you sprinkle pollen grains on water in a beaker and observe using a hand lens U'll see they are moving randomly
Answer: a. 
: 
is negative
b. 
: is negative
c. 
: is negative
Explanation:
Entropy is the measure of randomness or disorder of a system. If a system moves from an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa
a)
In this reaction 2 moles of gaseous reactants are converting to 1 mole of gaseous products. The randomness will decrease and hence entropy will also decrease. Thus is negative.
b)
In this reaction solid reactants are converting to aqueous products. The randomness will increase and hence entropy will also increase. Thus is positive.
c)
In this reaction aqueous reactants are converting to solid products. The randomness will decrease and hence entropy will also decrease. Thus is negative
Each substance in the mixture<span> keeps its own properties and can be </span><span>easily separated from the </span>mixture.<span> In a mixture of hydrogen and oxygen, molecules of both the gases will exist independently.</span>
The compound<span> on the other hand has properties different from the </span>elements it contains. In water as a compound of hydrogen and oxygen <span>what you will have is molecules of H20.</span>
Produces OH - ions when added to water acid
Answer: The speed of a wave with a frequency of 64 Hz and a wavelength of 102m is 6528 m/s.
Explanation:
The formula of a speed of a wave is frequency x the wavelength.
Therefore multiply 64 and 102.
You get 6528 m/s which is the correct answer.
