The metal that has the highest melting point is Mo while the metal that has the lowest melting point if Fr.
<h3>Melting points of metals</h3>
Metals are those elements found towards the left hand side of the periodic table. They are able to loose electrons easily and they have a high , melting and boiling point.
The metal that has the highest melting point is Mo while the metal that has the lowest melting point if Fr. This is clear from the chart of melting points in the image attached to the question.
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D = m/ V
8.9 = 3 / V
V = 3 / 8.9
V = 0.3 cm³
Answer A
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The enthalpy change, ΔH for the following reaction is -452.76 kJ.
<h3>What is enthalpy change, ΔH, of a reaction?</h3>
The enthalpy change of a reaction is the heat changes that occurs when a reaction proceeds to formation of products.
- Enthalpy change, ΔH = ΔH of products - ΔH of reactants
The equation of the reaction is given below
Therefore, the enthalpy change, ΔH for the following reaction is -452.76 kJ.
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The systematic answer is Aluminum Nitride, Nitrogen Trifluoride, Potassium nitride, Barium sulfite, Silicon dioxide, Rubidium iodide
What do you mean by systematic name in chemistry?
A systematic name is a term that is applied methodically to one distinct population, creature, object, or chemical substance.
AlN = Aluminium Nitride
NF3 = Nitrogen Trifluoride
K3N = Potassium nitride
BaS = Barium sulfite
SiO2 = Silicon dioxide
RbI = Rubidium iodide
Hence, the systematic order is Aluminium Nitride, Nitrogen Trifluoride, Potassium nitride, Barium sulfite, Silicon dioxide, Rubidium iodide.
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Answer:
V = 53.82 L
Explanation:
Given data:
Mass of benzene = 45 g
Temperature = 100°C (100+273 = 373 K)
Pressure = 250 torr (250/760 = 0.33 atm)
Volume of benzene = ?
Solution:
Number of moles of benzene:
Number of moles = mass /molar mass
Number of moles = 45 g/ 78.11 g/mol
Number of moles = 0.58 mol
Volume of benzene:
PV = nRT
V = nRT/P
V = 0.58 mol × 0.0821 atm.L/mol.K × 373 k / 0.33 atm
V = 17.76 atm.L /0.33 atm
V = 53.82 L