Answer:
Mass
Explanation:
Physical properties of substance are classified as Intensive property and Extensive property.
Intensive Property:
A physical property whose value is independent of the mass of a substance for which it is measured.
Examples:
i) Melting / Boiling Points
ii) Temperature
iii) Color
iv) Density
v) Pressure
Extensive Property:
A physical property whose value is dependent on the mass of a substance for which it is measured.
Examples:
i) Amount of Substance
ii) Mass
iii) Volume
iv) Enthalpy
v) Entropy
<span><span>Convert the percentages into decimals (you can do that by dividing the percent by 100), then multiply that by its
corresponding mass to find its relative amount/ contribution to the
atomic mass of chromium. After doing so, add all of the obtained values
together to get the average mass.
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83.79% = .08379
9.50% = .095
4.35% = .0435
2.36% = .0236
Average mass of chromium = 0.8379(51.94) + 0.095( 52.94) + 0.0435(49.95) + 0.0236(53.94)
Answer: 52amu
P.S. never forget units
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Answer:
The balloon is cooled at a constant pressure until the temperature is -11°C. What is the volume of the balloon at this stage?
Answer: option <span>C: H2O(l) at 10°C changes to H2O(l) at 20°C
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Explanation:
To solve this questions use the fact the temperature is a measure of the average kinetic energy of the particles of a substance.
For a given substance, the higher the temperature the higher kinetic energy, the lower the temperature the lower the kinetic energy
That is a statement derived from the kinetic theory.
The kinetic energy states that as the temperature of a substance increases, so do the average velocity of its particles and so the average kinetic energy.
Thas is why gases have a higher kinetic energy than liquids and liquids have a higher kinetic energy than solids.
The options A<span>: H2O(s) changes to H2O(l) at 0°C and B: H2O(l) changes to H2O(s) at 0°C describe changes at constant temperature, so in them the average kinetic energy does not change.</span><span>
</span><span>
</span><span>The option C: H2O(l) at 10°C changes to H2O(l) at 20°C, as said, is the right answer because it is a process in which the temperature is increasing, so the average kinetiic energy is also increasing.</span><span>
</span><span>
</span><span>The option D: H2O(l) at 20°C changes to H2O(l) at 10°C corresponds to a decrease of the kinetic energy, since the temperature is decreasing.
</span><span>
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<span>The ionic form of Chlorine is Chloride. Chloride helps maintain the body's fluid balance. It is a component of hydrochloric acid (HCl acid) in your stomach which helps good digestion. It is also an aide to maintain the acid-base balance of your body. Among the choices given, letter C is not a function of chloride. Excess or too much dietary intake of chloride causes hypertension.</span>