Answer: A. 490.48mol
Explanation:
Using the ideal gas equation; PV =nRT
where P = Presssure = 200 atm
V = Volume = 60L
n = Number of moles
R = Gas constant = 0.08206 L.atm/mol/K
T = Temperature = 25 °C + 273 = 298K
Make "n" the subject of the formular;
n = PV / RT
= 200 x 60 / 0.08206 x 298
= 490.73 mol, which is closest to option A. 490.48mol
Answer:
Compound is: Ammonia
Number of NH3 Molecules: 7.7905x10^23
Number of N atoms: 7.7905x10^23
Number of H atoms: 2.337x10^24
Explanation:
In order to obtain number of particles: We first need to calculate number of moles which is equal Mass/Molar mass (N=14 H=1)
Thus Number of moles equal 22/14+3 = 1.294117647 Moles
Number of particles equal Number of moles multiply Avogadro's number = 1.294117647 x 6.02x10^23 = 7.7905x10^23 Molecules of NH3
Since that each molecule contains one Nitrogen atom therefore, Number of molecules = number of atoms while each molecule contains 3 Hydrogen atoms therefore, Number of hydrogen atoms = 3x Number of Molecules = 2.337x10^24
The answer is- Volume of flask = 247.8 
or 247.8 mL.
Density (d) is defined as mass of substance divided by its volume. Thus, if mass and density are known, then Volume can be determined.
What is the formula of volume in terms of density?
- Let mass of substance be 'm' and volume be 'V'. Thus, as per the definition of density, it is expressed as-
Thus, volume can be expressed as-
- Now, mass of empty flask = 241.3 g and the mass of (flask + Water) = 489.1 g.
Thus, mass of water = 
.
- Thus, mass of water = 247.8 g and density of water =
. Its volume is calculated as-
- Hence, volume of flask = 247.8 or 247.8 mL.
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A good example is table salt
Table salt at room temperature is a lattice structure-- meaning its ions are SUPER close to each other and hence can't flow.
If you look at electrical insulators, it simply means they can't carry charge-- because there's no flow of charge.
If you dissolve table salt or melt it, it becomes Dissociated meaning NaCl becomes Na^+ and Cl^-
So now they are separated, and they are ions (charged particles)-- because they are separated they can flow, and because they are charged, they carry a charge. Hence, a flowing charge when they are melted (at super high temperatures) or dissolved (yes, even at room temperatures)
