Answer: Neither scientist discovered “ Avogadro's number” in the form we use it today (6.02 x 10 23). Still, there's a controversy ...
Explanation: hope this helps
Answer:
d = 1.023 g/mL
Explanation:
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
D=m/v
D= density
m=mass
V=volume
Symbol:
The symbol used for density is called rho. It is represented by ρ. However letter D can also be used to represent the density.
Given data:
Volume of water = 5.00 mL
Weight of empty beaker = 18.926 g
Weight of beaker with water = 24.041 g
Density of water = ?
Solution:
First of all we will calculate the mass of water.
Mass of water = mass of beaker with water - mass of beaker
Mass of water = 24.041 g - 18.926 g
Mass of water = 5.115 g
Density:
d = m/v
d = 5.115 g/ 5.00 mL
d = 1.023 g/mL
<span>T = 33 + 273 =306 K
moles CO = pV/RT = 1.24 x 2.74 / 0.08206 x 306=0.135
mass CO = 0.135 mol x 28.01 g/mol=3.78 g</span>
for one you could do a bell, ringing noise, then say someone rang it.
For two you could do tunnel, echoing, then say someone yelled and it echoed.
for three you could do a bowl, ringing, spoon hitting it
hope i could help
Answer:
Tap water is homogeneous mixture because all minerals are dissolved and uniformly distributed init.
The lemonade is also consider the homogeneous mixture if pulp is separated.
Explanation:
The solution is always homogeneous mixture and transparent through which the light can travel. The mixture of water lemon and sugar without pulp (lemonade) is a solution because sugar and lemon is soluble in water and form homogeneous mixture. The tap water is also a homogeneous mixture because minerals are present in dissolved form. The sand and soil can not dissolve in water and particles scatter the light thus form heterogeneous mixture.
Homogeneous mixture:
"The homogeneous mixture are transparent through which the light can travel and called solution"
The mixture of water, lemon and sugar is a solution because sugar is soluble in water and form homogeneous mixture. The solubility of sugar is high as compared to the sand in water because the negative and positive ends of sucrose easily dissolve into the polar solvent i.e, water
Heterogeneous mixture:
"The heterogeneous mixture is a suspension in which the solute particles settle down but does not dissolve"
The mixture of water and sand is suspension. The sand can not dissolve in water because it is mostly consist of quartz. The nonpolar covalent bonds of sand are too strong and cannot be break by water molecules.