Physical change means - a change from one state ( solid,liquid or gas) to another state without change in chemical composition.
Answer:
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Gold alloys consist of most commonly Nickel!
Most commonly used in things like jewelry so it doesn't have such a heavy weight.
Answer:
is the mole fraction of potassium dichromate.
Explanation:
Mass of potassium dichromate = 24.42 g
Moles of potassium dichromate =
Mass of water = 240.0 g
Moles of water =
Mole fraction is calculated by:


is the mole fraction of potassium dichromate.