Answer b I think so sorry if not is
Answer:
Heat change = 3.77kJ
Explanation:
T1 = 25°C
Mass = 65g
T2 = 30°C
specific heat capacity of water = 4.184J/g°C
Heat energy = ?
Heat energy = MC∇T
Heat energy (Q) = MC(T2 - T1)
Q = 65 * 4.184 * (30 - 15)
Q = 251.04 * 15
Q = 3765.6J
Q = 3.77KJ
The heat change during the reaction was 3.77kJ
Answer:
I, III, and V
Explanation:
All five options are correct.
However, your instructor is probably expecting the answer I, III, and V.
These three elements are on the left-hand side of the Periodic Table. Thus, they tend to lose electrons and form positive ions most easily.
H is the most reluctant to form a cation. Its first ionization energy is 1100 kJ·mol⁻¹.
However, F and He can lose electrons to form cations.
It takes only 1700 kJ·mol⁻¹ to remove an electron from F. However, F tends to add electrons to get a complete valence shell.
Even He, with a complete valence shell, will give up a valence electron for the expenditure of only 2400 kJ·mol⁻¹.
Answer:
Group 5th A.
Explanation:
The elements of group 5th A shows the electronic configuration of s² p³.
This group consist of nitrogen, phosphorus, arsenic, antimony, bismuth.
Electronic configuration of nitrogen:
N₇ = [He] 2s² 2p³
Electronic configuration of phosphorus
P₁₅ = [Ne] 3s² 3p³
Electronic configuration of arsenic
As₃₃ = [Ar] 3d¹⁰ 4s² 4p³
Electronic configuration of antimony
Sb₅₁ = [Kr] 4d¹⁰ 5s² 5p³
Electronic configuration of bismuth
Bi₈₃ = [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
Six hours and forty minutes .