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Aleks [24]
4 years ago
11

I have no idea how to do this

Chemistry
2 answers:
alexandr402 [8]4 years ago
7 0
<span>It is known that amu is equal to the molar mass of 1 mole of substance. Therefore,
</span>
Weight of one mole of uranium = 238 g/mol


The molar mass or molecular weight for U205 is 556 g/mol.
(238 x 2) + (16 x 5) = 556 g/mol
kirill [66]4 years ago
6 0

Answer:

Molecular mass U2O5 = 556 g/mol

Explanation:

The atomic mass of an element expressed in amu (atomic mass units) is equal to the weight in grams of 1 mole of the corresponding element

i.e. amu = g/mole

The atomic weight of Uranium = 238 amu

Therefore, weight of 1 mole of Uranium = 238 g/mol

Weight of 1 mole of O = 16.00 g

Molecular mass of U2O5 = 2(atomic weight of U) + 5(atomic weight of O)

Molecular mass of U2O5 = 2(238g/mol) + 5(16 g/mol) = 556 g/mol

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Answer:

B) 0.6M

Explanation:

               I apologize in advance if it is not correct :l

The (M1V1= M2V2) is given for you to plug in the correct numbers so let's jot this down.

                    (M1*V1= M2*V2)

so they give us 6M which would be our (M1), from this we can also conclude that 5mL is also V1; ( if you notice the M1's and V1's are always found next to eachother). This leads us to our 50mL, this would be our V2 because the volume went from 5mL to 50mL. Now lets put this in order based on what we know.

M1= 6M                                (M1*V1= M2*V2)

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now we plug in what we know into the equation to find the unknown (M2)

                   (6M*5mL= M2*50mL)

now we could do the long math, but I don't think your on brainly to do the hard way. so lets keep it simple!

                   We are going to put the 50mL under the (6M*5mL) for division.

                             \frac{(6M*5mL)}{(50mL)} This is honestly MUCH easier, than manually answering. you just put that in the calculator and it'll give you B) 0.6M

                 

   honestly though I might not know what I'm doing cuz im currently doing my test and decided to answer this question ;)

        Good Luck!

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