<span>11.2G is the answer to this problem.
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Answer:
A- beryllium
B- calcium
C- magnesium
Explanation
NOTE: all element in group 2 have 2 balance electrons
First let’s start with B- number of electrons= number of protons which is equal to the atomic number. therefore, the answer is calcium as it’s atomic number is 20
C- magnesium will have three energy levels considering it has 12 electrons (2,8,2).
A- beryllium is the lightest one in group 2 as it has the atomic mass of 9.0122.
Answer:
1: table sugar has more calories
2: Hydrogen and carbon monoxide and smaller quantities of methane, carbon dioxide, and hydrocarbons
Explanation:
Give brainliest
Answer:
Q = 1252.82kJ
Explanation:
Mass = 179g
Initial temperature (T1) = 25°C = (25+273.15)K = 298.15K
Final temperature (T2) = 82.70°C = (82.70 + 273.15)K = 335.85K
Specific heat capacity (c) = 121.3J/g.K
Heat energy (Q) = mc∇T
M = mass of the substance
Q = heat energy
c = specific heat capacity of the substance
∇T = change in temperature of the substance = T2 - T1
Q = mc∇T
Q = 179 × 121.3 × (355.85 - 298.15)
Q = 21712.7 × 57.7
Q = 1,252,822.79
Q = 1252.82kJ
The heat energy required to heat 179g of acetic acid from 25°C to 82.70°C is 1252.82kJ
