How much energy must be added to a bowl of 125popcorn kernels in order for them to reach a popping temperature of 175°C? Assume
1 answer:
Answer:
3,335.06 Joules of an energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175°C.
Explanation:
Number of popcorn kernels = 125
Mass of single popcorn kernel = 0.105 g
Mass of 125 popcorn kernel = m = 125 × 0.105 g = 13.125 g = 13.125 × 0.001 kg
1 g = 0.001 kg
Specific heat of popcorn = c = 1650 J/kg°C
Initial temperature of the popcorn kernels =
Final temperature of the popcorn kernels =
Heat added to popcorn kernel to rise their temperature to popping temperature be Q.
Q = 3,335.06 J
3,335.06 Joules of an energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175°C.
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Answer: Option (b) is the correct answer.
Explanation:
It is known that metals are the species which readily lose an electron and tend to attain a positive charge.
For example, atomic number of sodium is 11 and its is an alkali metal. It electronic distribution is 2, 8, 1.
And, in order to attain stability it readily loses an electron and thus it become ion.
Also, it is known that species which tend to transfer or donate their valence electrons to other atoms tend to form ionic bond and the compound formed is known as ionic compound.
Therefore, we can conclude that the statement metal atoms held together by ionic bonds best describes a metal solid.
Answer :
(a) The charge and full ground-state electron configuration of the monatomic ion is, (+1) and
(b) The charge and full ground-state electron configuration of the monatomic ion is, (-3) and
(c) The charge and full ground-state electron configuration of the monatomic ion is, (-1) and
Explanation :
For the neutral atom, the number of protons and electrons are equal. But, they are unequal when the atoms present in the form of ions or the atom has some charges.
When an unequal number of electrons and protons then it leads to the formation of ionic species.
Ion : An ion is formed when an atom looses or gains electron.
When an atom looses electrons, it will form a positive ion known as cation.
When an atom gains electrons, it will form a negative ion known as anion.
(a) The given element is, Rb (Rubidium)
As we know that the rubidium element belongs to group 1 and the atomic number is, 37
The ground-state electron configuration of Rb is:
This element will easily loose 1 electron and form ion which attain stable noble gas electronic configuration.
The full ground-state electron configuration of Rb ion is:
(b) The given element is, N (Nitrogen)
As we know that the nitrogen element belongs to group 15 and the atomic number is, 7
The ground-state electron configuration of N is:
This element will easily gain 3 electrons and form ion which attain stable noble gas electronic configuration.
The full ground-state electron configuration of N ion is:
(c) The given element is, Br (Bromine)
As we know that the bromine element belongs to group 17 and the atomic number is, 35
The ground-state electron configuration of Rb is:
This element will easily gain 1 electron and form ion which attain stable noble gas electronic configuration.
The full ground-state electron configuration of Br ion is: