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Serjik [45]
4 years ago
9

Okay one last time, I need help with these last two

Chemistry
2 answers:
statuscvo [17]4 years ago
7 0

Answer:

C

Explanation:

Fractions and negative numbers are considered rational numbers.

Fractions are not considered integers.

Natasha2012 [34]4 years ago
6 0
4 is c! 5 is all negative numbers ( if natural number means whole numbers)
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an ecosystem that is not sustainable can break down when a natural disaster occurs this can lead to organisms in the ecosystem i
ELEN [110]

Answer:

not sure if it's a or b but I think it's a

7 0
2 years ago
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The 235U isotope (atomic mass = 235.00) undergoes fission when bombarded with neutrons. However, its natural abundance is only 0
Marianna [84]

Answer:

So ²³⁵UF₆ effuses 1.0043 times faster than ²³⁸UF₆

Explanation:

The rate of effusion of two gases A and B can be expressed by <em>Graham's law</em>:

\frac{EffusionRateA}{EffusionRateB}=\sqrt{\frac{M_{B}}{M_{A}} }

Where M is the molar mass, and in this case A is ²³⁵UF₆ while B is ²³⁸UF₆.

So now we <u>calculate the molar mass of each mass</u>:

²³⁵UF₆ ⇒235 + 6*19 = 349 g/mol

²³⁸UF₆ ⇒238 + 6*19 = 352 g/mol

Putting the data in Graham's law:

\frac{Rate^{235}UF_{6}}{Rate^{238}UF_{6}}=\sqrt{\frac{352}{349} } = 1.0043

So ²³⁵UF₆ effuses 1.0043 times faster than ²³⁸UF₆.

4 0
3 years ago
Complete the mechanism for the electrophilic addition wtien the alkene is treated with water in acid.
ser-zykov [4K]
Alkenes undergo Electrophillic Addition Reactions. Electrophiles are added across double bond. In given reaction the H⁺ is first added across double bond as the double bond being denser in electron density act as a neucleophile. A carbocation formed depends upon the nature of Alkene, if alkene is symmetrical (as in our case) then positive charge can get any position, but in case of unsymmetrical alkene the positive charge will go to that carbon which is attached to more carbon atoms. Then the water molecule attacks the carbocation and forms alcohol.

5 0
4 years ago
A boy with a mass of 30 kg is ice skating at a speed of 2m/s. What type of energy is he using and what are the joules?
Annette [7]

Answer:

The boy is using kinetic energy. And his joules are 60

6 0
3 years ago
The mass of a block is 2.5 g the volume of the block is 4.1 mL.  what is the density of the block
Arlecino [84]

Answer:

6.6g

Explanation:

6 0
3 years ago
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