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An element is to an atomas an organ is to a cell. Just as atoms are the fundamental building blocks of elements, cells are the basic units of living organisms.
Elements are composed of atoms, each characterized by a specific number of protons, neutrons, and electrons.
Similarly, organs are composed of cells, each with specialized structures and functions that collectively contribute to the overall function of the organ.
The analogy highlights the hierarchical organization of matter and life, emphasizing how complex structures are formed from simpler components.
Just as elements combine to create diverse substances, cells come together to form intricate organs essential for life processes.
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Answer:
An element is to a compound as an organ is to tissue
Explanation:
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A gas occupies a volume of 30.0L, a temperature of 25°C and a pressure of 0.600atm. What will be the volume of the gas at STP?
Largest radius to Smallest radius
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K
Ca
Ga
Ge
As
Sc
Br
Kr
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The elements according to the decreasing atomic radius are arranged as-
K, Ca, Sc, Ga, Ge, As, Br, Kr
An atomic radius is half the distance between adjacent atoms of the same element in a molecule. It is a measure of the size of the element’s atoms, which is typically the mean distance from the nucleus centre to the boundary of its surrounding shells of the electrons.
An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements. The atomic radius decreases on moving from left to right across a period.
Thus the elements according to the decreasing atomic radius are arranged as -
K, Ca, Sc, Ga, Ge, As, Br, Kr
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K
Ca
Ga
Ge
As
Br
Kr
Smallest
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Answer:
Sublimation is basically cause by the heat absorption and this process is an endothermic since it require extra energy.
It basically provide sufficient energy to molecules to control the various type of attractive forces from the neighbors and then convert it into the vapor phase.
Sublimation occur when the particle of gases become cold because some substances has high vapor pressure. Sublimation is the endothermic change and it occur below the triple point in terms of pressure and temperature.
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Answer:
Around 2.0 L of ethylene glycol needs to be added to the car radiator
Explanation:
The depression in freezing point ΔTf of a solution is directly proportional to its molality (m), i.e.
From the given information:
= freezing pt of solution = -10.0 C
= freezing pt of pure solvent = 0 C
Kf = freezing pt depression constant = 1.86 C/m
i = 1 for ethylene glycol antifreeze
Volume of water = 6.50 L = 6500 ml
Density of water = 1.00 g/ml
Therefore mass of water =
Molar mass of ethylene glycol = 62 g/mol
Mass of ethylene glycol needed =
Density of ethylene = 1.11 g/ml
Therefore, volume needed =
m = 8.60 = moles solute / 6.50 Kg
moles solute = 55.9
mass solute = 55.9 x 62.068 g/mol=3470 g
V = 3479/ 1.11 =3126 mL= 3.13 L
delta T = 8.60 x 0.512 =4.40
boling point = 104.4 °C
Hope this helps.
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Answer:
There are 23 electrons in Fe3+
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Answer: The correct answer is Option c.
Explanation:
Vaporization is defined as the physical process in which liquid particles get converted to gaseous particles.
The value of standard Gibbs free energy is 0 for equilibrium reactions.
To calculate for the reaction, we use the equation:
where,
= standard entropy change of vaporization
= standard enthalpy change of vaporization = 30.7 kJ/mol = 30700 J/mol (Conversion factor: 1 kJ = 1000 J)
T = temperature of the reaction = 353.3 K
Putting values in above equation, we get:
Hence, the correct answer is Option c.
Final answer:
The change in entropy (ΔS°vap) of benzene at its normal boiling point can be calculated using the enthalpy of vaporization (ΔH°vap) and the temperature (T). The ΔS°vap for benzene at 353.3 K is 0.087 J/(mol·K).
Explanation:
The enthalpy of vaporization (ΔH°vap) of a substance is related to the change in entropy (ΔS°vap) by the equation ΔS°vap = ΔH°vap / T, where T is the temperature in Kelvin. We are given that the enthalpy of vaporization of benzene at its normal boiling point (T = 353.3 K) is 30.7 kJ/mol. Plugging these values into the equation, we can calculate ΔS°vap to be 30.7 kJ/mol / 353.3 K = 0.087 J/(mol·K).
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The main issues of using synthetic polymers include toxicity poor biocompatibility etc. Synthetic polymers stay non-degradable for ling time and make the surface polluted.
What are synthetic polymers?
Natural polymers are naturally made substances such as cellulose, starch, glycogen etc. Polymers made by man are called synthetic polymers. Synthetic polymers are diverse and are made through several polymerization techniques.
PVC, polyethylene, polyesters Teflon etc. are very common polymers in daily life. A major class of synthetic polymers include plastics which are major pollutants nowadays.
Most of the synthetic polymers are non-biodegradable and will cause landfill issues. Some them are toxic in nature and might cause several health issues. Blending them with biodegradable polymers is a solution for this.
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Answer: As trash, Synthetic Polymers are not biodegradable. Landfills can easily fill up with synthetic polymers. Plastics can be made into different products. Recycling synthetic polymers is costly.
Explanation: Hope this helps in any way possible!