Conduction
Convection
Radiation
Explanation:
The main types of heat transfer are heat transfer by conduction, convection and by radiation.
These forms of heat transfer has different modes of application.
- Conduction is a form of heat transfer in solids. It requires a material medium to dissipate. Here, heat flows from a hot end to a cold end.
- Convection is a form of heat transfer in fluids i.e liquids and gases. In convection, heat is transferred due to density differences between heated fluids.
- Radiation does not involve material medium. It uses the electromagnetic waves to dissipate heat.
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The reason is it has more sugar and energy to feed fungi, causing it to mold.
Answer:-
0.3 moles
Explanation:-
According to the question,
Volume of nitrogen gas V = 6.8 litres.
Pressure of nitrogen gas P = 100 kPa.
Temperature of nitrogen gas T = 273 K.
We know the value of universal gas constant R = 8.314 litres kPa K−1 mol−1
Using the relation
PV = nRT
We have Number of moles of nitrogen gas n = P V / RT
= 100 kPa x 6.8 litres / ( 8.314 litres kPa K−1 mol−1 x 273 K)
= 0.3 mol
Thus there are 0.3 moles of nitrogen gas in 6.8 liters at standard temperature and pressure (273 K and 100 kPa)
Answer:
<h2>
total no. of electron present in Valency shell is called valency electron </h2><h2>___________________</h2>
<h2>valency shell is that in which last electron is present</h2>
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.
