Answer: 0.000625
Explanation:
If you don't know, one Milligram is equivalent to 0.000001 Kilograms. Hence, we'll multiply 625 by 0.000001.
With that being said, 625 times 0.000001 will equal to 0.000625.
Don't forget to add the units.
Milogram unit ⇒ mg
Kilogram unit ⇒ kg
Finally, your grand answer is 0.000625.
<em>Please comment down below for any questions about my answer.</em>
Answer:
One mole of U238 ( 6.022 X 10^23 atoms) is 238 grams; one mole of U235 is 235 grams. The difference in molecular weight between a mole of U235 and U238 is 3 grams, the secret to enriching uranium.
Explanation:
Answer:
1.67×10^25 molecules
Explanation:
No of molecules = no of moles × Avogadros number
No of moles= mass in gram / molar mass
No of moles of water in given sample = 500.3/18
= 27.79 moles
No of molecules = 27.79× 6.02×10^ 23
= 167.32×10^23 or 1.67×10^25
Drag is the force pushing against a forward motion.
Answer: Fe2O3
Explanation:
100 grams of iron ore = 30.06% oxygen
100 - 30.06 = 69.94% iron
Mr of Iron = 55.85
Mr of Oxygen = 16
Iron = 69.94/55.85 = 1.252
Oxygen = 30.06/16 = 1.879
1.879 / 1.252 = 1.5 of Oxygen
1.252/1.252 = 1 of Iron
we can write that as Fe1O1.5 but we can't use decimals therefore we have to multiply the whole thing by 2
So it comes out to be Fe2O3
