it is equal to the potential energy of the products
Answer:
mg3n2 and cacl3 hope it helps
Answer:
(C) PCl₅
Explanation:
(A) AlCl₄⁻
The central atom has 4 bond pairs and 0 lone pair. Hybridization is sp³. The geometry is tetrahedral which has an angle of 109.5°.
(B) NH₃
The central atom has 3 bond pairs and 1 lone pair. Hybridization is sp³. The geometry is pyramidal which has an angle of approximately 107.5°.
(C) PCl₅
The central atom has 5 bond pairs and 0 lone pair. Hybridization is sp³d². The geometry is trigonal bipyramidal in which the equatorial bonds has an angle of 120° and axial bond has an angle of 90°.
(D) CO₂
The central atom has 4 bond pairs and 0 lone pair. Hybridization is sp. The geometry is linear which has an angle of 180°.
(E) H₂O
The central atom has 2 bond pairs and 2 lone pairs. Hybridization is sp³. The geometry is bent shape which has an angle of approximately 105.5°.
Step 1
Molarity is defined as Moles of solute (NH3) divided by the volume of the solution in L
Molarity (mol/L or M) = moles of NH3/volume of the solution (L) (1)
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Step 2
The moles of solute (NH3):
0.500 % by mass means:
0.500 g/100 g solution
Moles of NH3 are calculated as:
Mass of NH3/molar mass NH3 = 0.500 g/17.0 g/mol = 0.029 moles NH3
(molar mass NH3 = 17.0 g/mol)
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Step 2
The volume of solution:
Volume is calculated from density
Density = mass solution/volume of solution
Volume = mass of solution/density = 100 g solution/0.996 g/mL => Volume = 100.4 mL
1L = 1000 mL => V = 100.4 mL = 0.1004 L
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Step 4
From (1)
Molarity = moles of NH3/volume of the solution (L) = 0.029 moles NH3/0.1004 L = 0.289 mol/L
Answer: M = 0.289 M or mol/L
The amount of heat required to change 25 grams of water into steam is 56425 joules or 13500 calories.
