Cold water<span> is </span>more dense<span> and will sink in room-temperature </span>water<span>. hope it helps :)</span>
No. You can pour a powdered juice mix in water,and when fully dissolved it will become one. You can also leave the water to evaporate and the powdered juice mix will still be in the jug. This is a physical property which is called solubility.
-1 is the oxidation number of Cl
Answer:
I cannot give you all the answer but I can help you to solve those.
Explanation:
The first question:
How many grams are there in 7.5× molecules of ?
So we need to find the molecular mass first, use your periodic table,
And then we can find out 2+32+16×4=98 g/mol
Then, we need to find how many moles, by using Avogadro's constant:
Avogadro's constant: 1 mole = 6.02×
∴=1.25 mol(2d.p.)
Lastly, find the grams using the formula
m=Mn
m=1.25*98
m=122.5g
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In conclusion, use those formula to help you:
(which M = molecular mass(atomic mass) m=mass of the substance and n = moles)
Avogadro's constant: