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3 years ago

12

Can the components of the iron sulfide compound be separated by physical means (ex. filtration or boiling)? if not, how could th

ey potentially be separated?

1 answer:

Simora [160]3 years ago

3 0

No use a magnet to pick up the iron

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State two procedures which should be used to properly handle a light microscope

babunello [35]

hold at base and arm

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2 years ago

If the compound has a molar mass of 156 g/mol, what is its molecular formula?

oksano4ka [1.4K]

I believe that the choices for this question are:
C2H4O2, C4H8O4 CH2O, C6H12O6 C3H6O3, C6H12O6 C2H4O2, C6H12O6

The answer to this based on the molar masses given is:
C2H4O2, C6H12O6

To prove calculate the molar mass:
C2H4O2 = 2*12 + 4*1 + 2*16 = 60
C6H12O6 = 6*12 + 12*1 + 6*16 = 180

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2 years ago

There is a 50 g sample of ra-229. It has a half-life of 4 minutes.how much will be left after 12 minutes? a. 3.13 g b. 6.25 g c.

polet [3.4K]

It's B. 6.25

first divide 50/2

then divide 25/2

after that divide 12.5/2

Then you get 6.25

Hope it helps!

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2 years ago

At what temperature in the Kelvin scale does water boil? Explain what happen when we supply heat energy to water till it changes

erma4kov [3.2K]

100 +273=373 kelvins

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2 years ago

Lithium iodide has a lattice energy of −7.3×102kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithi

Anna007 [38]

Delta H of solution = -Lattice Energy + Hydration
<span>Delta H of solution=- (-730)+(-793) </span>
<span>Delta H of solution= -63kJ/mol </span>

<span>Now we find moles of LiI: </span>
<span>10gLiI/133.85g=.075moles </span>
<span>multiply moles to the delta H of solution to cross cancel moles. .75moles x -64kJ/mol =4.7</span>

7 0

2 years ago

Read 2 more answers