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4 years ago

Physics vs organic chemistry which is harder

1 answer:

3 0

Organic chemistry was definitely harder for me, though this is a matter of opinion and learning style. If you are good with logic, then organic chemistry might not be so hard, or at least that's what my professor said. A lot of physics was just knowing how to use formulas and then plugging and chugging, and knowing basic outcomes of physical reactions. It's a whole other story if you take calculus based physics.
Good luck.

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The activation energy of an endothermic reaction

yarga [219]

Answer:

The activation energy of an endothermic reaction

A) must be greater than the required △H

Explanation:

endothermic reaction : Are those which absorbs heat from the surrounding

.<em>This energy provide activation energy for the reaction to occur</em>.

So activation energy becomes more than enthalpy.

7 0

4 years ago

What are the three main parts to an electrons “address” used in the current atomic theory that describe an electrons location?

erastova [34]

Answer:

Hope this helps

Explanation:

These are called quantum numbers: there are 4, but the first three are mainly used, only in orbital notation will you use all four.

The first is the electron's energy level or "shell", used as n. (Principle QN)

The second relates to the shape of the orbital and is used as l, when n and l are put together it defines the sublevel or subshell. (Angular Momentum QN)

The third one relates to the orientation of the electrons in that sublevel used as m(sub)l. (Magnetic QN)

The fourth one relates to the spin states of the electron, since they spin opposite directions, used as m(sub)s. (Electron Spin QN)

5 0

3 years ago

Which of the following is a heterogeneous mixture?

AleksAgata [21]

Answer: It would be paint.

Explanation: it would be paint because it doesn't come completely together. another example of a heterogeneous mixture could be cereal and milk.

6 0

4 years ago

what is the empirical formula for a compound which contains 32% carbon, 42.66% oxygen, 18.67 nitrogen, 6.67 % hydrogen

prisoha [69]

Answer:

C32H80N16O32

Explanation:

3 0

4 years ago

Suppose 2.90g of nickel(II) iodide is dissolved in 150ml of a 0.70M aqueous solution of potassium carbonate. Calculate the final

ehidna [41]

Answer:

0.124 M.

Explanation:

Hello!

In this case, since the nickel iodide has the following formula:

NiI₂

So its molar mass is 312.5023 g/mol, in order to compute the molarity of the iodide anion, we first need the moles in 2.90 g:

$n_{NiI_2}=2.90g*\frac{1molNiI_2}{312.5023 gNiI_2} =0.00927molNiI_2$

Now, since one mole of nickel(II) iodide contains two mole of iodide anions, we infer there are 0.0186 moles of iodide cations. Moreover, since the molarity is computed by dividing the moles of those ones by the volume of the solution in liters, 150 mL (0.150 L) as it does not change, it turns out:

$M=\frac{0.0186molI^-}{0.150L}\\\\M=0.124M$

Best regards!

8 0

3 years ago