Answers:
1. 7500 J; 3800 J/g
Step-by-step explanation:
1. Joules gained by water
q = mcΔT
Data:
m = 100 g
C = 4.184 J·°C⁻¹g⁻¹
ΔT = 18 °C
Calculation:
q = 100 × 4.184 × 18 =7500 J
2. Joules per gram of Pringle
Energy gained by water = energy lost by Pringle
q = -mΔH
7500 J = -1.984 g × ΔH
ΔH = -7500 J/1.984 g = -3800 J/g
Pringles contain 3800 J of food energy per gram.
First, let us calculate the moles of solute or sodium
bicarbonate is in the 1 ml solution.
<span>moles = 1 mL * (1 g
/ 9 mL) = 0.11 moles</span>
The molar mass of sodium bicarbonate is 84 g/mol,
therefore the mass is:
mass = 0.11 moles * 84 g/mol
<span>mass = 9.33 g</span>
The correct unabbreviated electron configuration is as below
Vanadium - 1S2 2S2 2P6 3S2 3p6 3d3 4s2
Strontium - 1s2 2S2 2P6 3S2 3P6 3d10 4S2 4P6 4S2
Carbon =1S2 2S2 2P2
<u><em> Explanation</em></u>
vanadium is in atomic number 23 in the periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d3 4s2
Strontium is in atomic number 38 in periodic table hence its electron configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4s2
Carbon is in atomic number 6 in periodic table therefore its electron configuration is 1s2 2s2 2p2
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms ,and because the carbon atom is just the right ,small size to fit in comfortably as parts of a very large molecules.
An ionic compound is always an electrolyte
