Answer:
Explanation:
because in air the particles are moving very fast and jar of coffee has hot particles which kinetic energy is also more so that's why it's particles move faster and gets mixed with air and smell is coming from far away
Answer: Compounds.
Explanation:
Compounds are formed when an unstable element combines with other elements, they do this by sharing electrons within their outmost shell. Compounds forms when there is a chemical bonding between two or more elements. Examples of compounds includes carbon dioxide (C, O) water (H and O), Sodium chloride (Na, Cl), methane, etc.
C. The total number of protons and neutrons in an atom.
In a neutral atom, the numbers of protons electrons are equal and also is equal to the atomic number. So mass # - atomic # = # of neutrons. Just some extra info there.
Answer: The mass of ice you would need to add to bring the equilibrium temperature of the system to 300 K is kg.
Explanation:
We know that relation between heat energy and specific heat is as follows.
q =
As density of water is 1 kg/L and volume is given as 400,000 L. Therefore, mass of water is as follows.
Mass of water = Volume × Density
=
= 400,000 kg
or, = g (as 1 kg = 1000 g)
Specific heat of water is 4.2 J/gm K. Therefore, change in temperature is as follows.
= 305 K - 273 K
= 32 K
Now, putting the given values into the above formula and calculate the heat energy as follows.
q =
=
= J
or, = kJ
According to the enthalpy of melting of ice 333 kJ/Kg of energy absorbed by by 1 kg of ice. Hence, mass required to absorb energy of kJ is calculated as follows.
Mass =
= kg
Thus, we can conclude that the mass of ice you would need to add to bring the equilibrium temperature of the system to 300 K is kg.
Niels Bohr developed a new model of the atom.