Answer:- B. Solvent molecules surround solute ions.
Explanations:- When an ionic solute that has positive and negative ions is dissolved in a solvent like water then the solute ions are surrounded by the water molecules in a way so that the highly electron negative oxygen atom of water is towards the positively charged ion of the solute and less electron negative which is hydrogen atom that has partial positive charge, surrounds the negatively charged ion of the solute.
Due to these forces made by the solvent molecules, the solute is broken into the ions and get dissolved in solvent.
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The answer is 0.492 because there are 100 meters in a hectometer, and 49.2/100 is 0.492
Answer: oxidizes in air
Explanation: Chemical property is the property which deals with change in chemical composition of the substance.
Physical change is the property which deals with change in physical state of the substance.
The above equation represents the oxidation of methane to form carbon dioxide and water. Thus the chemical composition has changed and is a chemical property.
Color and odor only involves no change in chemical composition.
Answer:
Q = 693 J
Explanation:
NaCl (aq) + AgNO₃ (aq) → AgCl (s) + NaNO₃ (aq)
Q = mcΔT
Q: heat
m: mass
c: specific heat
ΔT: temperature variation
Q = (50.0g + 100.0g) x (4.20 J/g°C) x (25.2°C - 24.1°C)
Q = 693 J
