<span>For the answer to the question above, we have to use this formula
moles equal mass divided by the molar mass
a) 4.50 g divided by the molar mass of water
molar mass of water = 2x1.0 + 1x16.0 = 18
4.50 g / 18.0 g per mole = 0.25 moles
b) 471.6 g / Molar mass of Ba(OH)2 = moles
c) 129.68 g / molar mass of Fe3(PO4)2 = moles
atoms of P in Mg3(PO4)2
2 atoms of P in each molecule of Mg3(PO4)2
247 g / molar mass of Mg3(PO4)2 = moles
moles of Mg3(PO4)2 x 6.022x10^23 = molecules of Mg3(PO4)2
I hope my answers gave you clarity on your question.</span><span>
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An element is an substance that cannot be broken down into a less massive substance.
An compound is a substance that can be broken down into an element by chemical means.
Example of Elements: Hydrogen, H, Carbon, C,
Example of Compounds: Salt, NaCl, Water, H2O
Hope that helps : )
Answer:
I would fill it up will 100 cm³ three times to get a 3/5 full glass.
Explanation:
Assume I get a glass of volume 500 cm³, 3/5 of it would be 3/5 × 500 cm³ = 300 cm³. So, the equivalent fraction would be .So i would fill it up will 100 cm³ three times to get a 3/5 full glass.
Answer:
one atom of an element = 6.02 \times {10}^{23} atom
The mass of one atom of sulphur = 32g
The mass of one atom of aluminium = 27g
so one atom of aluminium = 6.02 \times {10}^{23}
27g of AL = 6.02 \times {10}^{23} atom
2.70g of AL = X atoms
Then you cross multiply ........
and get the answer
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