The molecular formula is a chemical formula which indicates the exact number of atoms present in the molecule.
The given molecular formula is and the name of this molecule is propane consist of three carbon atoms which are linked with eight hydrogen atoms by single bonds.
Now, the figure 1 shows the condensed structural formula, figure 2 shows the structural formula and figure 3 shows the skeletal structural formula of propane.
at 70°C = 130 gram
NaCl at 100°C= 40 gram
NH₂Cl at 90°C= 70 gram
<h3>What is solubility?</h3>
Solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.
Amount of a substance (called the solute) that dissolves in a unit volume of a liquid substance (called the solvent) to form a saturated solution under specified conditions of temperature and pressure. Solubility is expressed usually as moles of solute per 100 grams of solvent.
Hence,
at 70°C = 130 gram
NaCl at 100°C= 40 gram
NH₂Cl at 90°C= 70 gram
Learn more about solubility here:
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Answer:
Iron has 5 unpaired electrons in Fe⁺³ state.
Explanation:
Iron having atomic number 26 has following electronic configuration in neutral state.
Fe = 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁶
When Iron looses three electrons it attains +3 charge with following electronic configuration.
Fe⁺³ = 1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵
The five electrons in d-orbital exist in unpaired form as,
3(dz)¹, 3d(xz)¹, 3d(yz)¹, 3d(xy)¹, 3(dx²-y²)¹
The 2 indicates the amount of hydrogen there is. In this case there are two atoms of hydrogen. The subscript will correspond to the “letter” (element symbol) right before it.
Let us say the molar mass of solute =24g.
mole of the solute = 0.8g x (1mol / 24g)
= 0.0333mol
molality = mol of solute / kg of solvent
= 0.333mol / 0.50kg
= 0.666M or 0.67M