For the first question, the property of gas that allows them to be stored in a bottle of air freshener is that gases are compressible. They follow the volume where they are stored.
For the second question, at the molecular level the molecules of the ice cream gains more kinetic energy as it is melting turning it into a liquid where the molecules now are loosely packed and collisions of each molecule decreases. This process is called melting.
The third question defines a gas where the molecules are far from each other and are at constant random motion. Also, from the kinetic molecular theory there is no forces of attraction between the molecules for a gas.
Answer: The molecular formula will be
Explanation:
If percentage are given and we are given total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of C= 31.17 g
Mass of H = 6.54 g
Mass of O = 62.29 g
Step 1 : convert given masses into moles.
Moles of C =
Moles of H=
Moles of O =
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C=
For H =
For O =
The ratio of C: H: O= 1: 2.5: 1.5
Converting them into whole number ratios by multiplying by 2.
Hence the empirical formula is
The empirical weight of = 2(12)+5(1)+3(16)= 77 amu
The molecular weight = 231.2 amu
Now we have to calculate the molecular formula.
The molecular formula will be=
The molecular formula will be
<span>no.of moles of SF6 = 0.35/molar mass of SF6 = 0.35/146.06 = 2.396 X 10^-3 </span>
<span>so you need 2.396 X 10^-3 moles of NH3 molecules </span>
<span>molar mass of NH3 = 17.031 g/mole </span>
<span>that means 1 mole of NH3 = 17.031 g </span>
<span>so 2.396 X 10^-3 moles of NH3 = 17.031 X 2.396 X 10^-3 = 0.041 g</span>
divide 5 hours 20 mins by 4,000
and ur answer is
320 mins/4000km
so
0.08
hope this helps
sorry if its wrong