Answer:
4.78 %.
Explanation:
<em>mass percent is the ratio of the mass of the solute to the mass of the solution multiplied by 100.</em>
<em></em>
<em>mass % = (mass of solute/mass of solution) x 100.</em>
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mass of MgSO₄ = 50.0 g,
mass of water = d.V = (0.997 g/mL)(1000.0 mL) = 997.0 g.
mass of the solution = mass of water + mass of MgSO₄ = 997.0 g + 50.0 g = 1047.0 g.
<em>∴ mass % = (mass of solute/mass of solution) x 100</em> = (50.0 g/1047.0 g) x 100 = <em>4.776 % ≅ 4.78 %.</em>
Answer: This description refers to: "hydrogen bonding" .
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<u> Hydrogen bonding </u> is a specific type of "dipole-dipole force" that exists <u /><em><u>between</u> </em> [molecules with hydrogen atoms] <em><u>and</u> </em> [molecules with nitrogen, oxygen, or fluorine atoms.] .
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N a polar covalent bond<span>, the electrons shared by the atoms spend a greater amount of time, on the average, closer to the Oxygen nucleus than the Hydrogen nucleus. This is because of the geometry of the molecule and the great electronegativity difference between the Hydrogen atom and the Oxygen atom.</span>
Answer 1 :
Image 1 shows : Liquid phase
Image 2 shows : Gas phase
Image 3 shows : Solid phase
Image 4 shows : Solid phase
- Solid phase : In this state, the molecules are closely and tightly packed. There is no vacant space present in it.
- Liquid phase : In this state, the molecules are loosely packed and there is an intermediate vacant space present in it.
- Gas phase : In this state, the molecules are very loosely packed and there is a lot of vacant space present in it.
Answer 2 :
Liquid to gas : Evaporation
Solid to gas : Sublimation
Gas to solid : Deposition
Solid to liquid : Melting
Liquid to solid : Freezing
Gas to liquid : Condensation
Explanation :
- Evaporation : It is a type of vaporization process in which a liquid changes into gas phase by providing heat.
- Sublimation : It is a process in which a solid changes directly into gas phase without passing through a liquid phase.
- Deposition : It is a process in which a gas transforms directly into a solid phase without passing through a liquid phase.
- Melting : It is a process in which a solid changes into liquid phase by providing heat.
- Freezing : It is a process in which a liquid transform into a solid phase.
- Condensation : It is a process in which a water vapor(gas) changes into liquid state.
