Answer:
Color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.
Explanation:
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<span>Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. Atomic size is difficult to measure because it has no definite boundary. The electrons surrounding the nucleus exist in an electron cloud.
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Answer:
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Answer:
0.9726g/ml
0.9726g/cm³
Explanation:
Density is found by dividing mass by volume.
Density = mass/volume
mass = 7.1g
volume= the new level of water raised - the initial level of water
volume = 32.4 - 25.1
volume = 7.3 ml
Volume is the amount of space occupied by an object.meaning the amount of volume displaced by the object is its volume.
density = 7.1 /7.3
density = 0.9726g/ml
or 0.9726 g/cm³
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Answer:
The heat produced is -15,1kJ
Explanation:
For the reaction:
2SO₂+O₂ → 2SO₃
The enthalpy of reaction is:
ΔHr = 2ΔHf SO₃ - 2ΔHf SO₂
As ΔHf SO₃ = -395,7kJ and ΔHf SO₂ = -296,8kJ
<em>ΔHr = -197,8kJ</em>
Using n=PV/RT, the moles of reaction are:
= <em>0,153 moles of reaction</em>
As 2 moles of reaction produce -197,8kJ of heat, 0,153moles produce:
0,153mol×
= <em>-15,1kJ</em>
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I hope it helps!
