Answer:
C: solvent
Explanation:
When solvent dissolve the solute it form solution. Solvent is present in large quantity while solute is present in less amount. Solution is homogeneous mixture of solvent and solute.
The rule which is followed is "like dissolve like". Polar solvent always dissolve polar solute while non polar solvent dissolve non polar substances.
Let consider the example of water and sodium chloride.
Water is polar substance it consist of H⁺ and OH⁻ ions. Sodium chloride is also polar substance it consist of Na⁺ and Cl ⁻ ions. When sodium chloride is added into the water it get dissolved because water breaks the bond between sodium and chloride and convert it into positive and negative ions. Na⁺ are surrounded by OH⁻ while Cl⁻ are surrounded by H⁺ and salt get dissolved.
This type interaction is called the London dispersion force. These are temporary forces that happens when electrons of two adjacent atoms occupy positions that will result to temporary dipoles. The constant motion of the electrons will cause to form an instantaneous dipole when the electrons are unsymmetrically distributed. These forces are present in nonpolar substances.
<span>15.4 milligrams
The ideal gas law is
PV = nRT
where
P = pressure of the gas
V = volume of the gas
n = number of moles of gas
R = Ideal gas constant (8.3144598 L*kPa/(K*mol) )
T = absolute temperature.
So let's determine how many moles of gas has been collected.
Converting temperature from C to K
273.15 + 25 = 298.15 K
Converting pressure from mmHg to kPa
753 mmHg * 0.133322387415 kPa/mmHg = 100.3917577 kPa
Taking idea gas equation and solving for n
PV = nRT
PV/RT = n
n = PV/RT
Substituting known values
n = PV/RT
n = (100.3917577 kPa 0.195 L) / (8.3144598 L*kPa/(K*mol) 298.15 K)
n = (19.57639275 L*kPa) / (2478.956189 L*kPa/(mol) )
n = 0.007897031 mol
So we have a total of 0.007897031 moles of gas particles.
Now let's get rid of that percentage that's water vapor. The percentage of water vapor is the vapor pressure of water divided by the total pressure. So
24/753 = 0.03187251
The portion of hydrogen is 1 minus the portion of water vapor. So
1 - 0.03187251 = 0.96812749
So the number of moles of hydrogen is
0.96812749 * 0.007897031 mol = 0.007645332 mol
Now just multiple the number of moles by the molar mass of hydrogen gas. Start with the atomic weight.
Atomic weight hydrogen = 1.00794
Molar mass H2 = 1.00794 * 2 = 2.01588 g/mol
Mass H2 = 2.01588 g/mol * 0.007645332 mol = 0.015412073 g
Rounding to 3 significant figures gives 0.0154 g = 15.4 mg</span>
<h2>Answer</h2>
Temperature change
<h3><em>P</em><em>l</em><em>s</em><em> </em><em>c</em><em>o</em><em>r</em><em>r</em><em>e</em><em>t</em><em> </em><em>m</em><em>y</em><em> </em><em>a</em><em>n</em><em>s</em><em>w</em><em>e</em><em>r</em><em> </em><em>i</em><em>f</em><em> </em><em>i</em><em>t</em><em>s</em><em> </em><em>w</em><em>r</em><em>o</em><em>n</em><em>g</em><em> </em>●~●</h3><h3>#CarryOnLearning</h3>
