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2 years ago

If you test the boiling point of ethanol and have a 2.3% error, what was the boiling point of ethanol in the test?

Chemistry

1 answer:

anyanavicka [17]2 years ago

3 0

Answer:

the answer is A

Explanation:

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12. How much mass is in a 3.25-mole sample of NH 4 OH? A. 10.8 g B. 34.0 g C. 35.1 g D. 114 g

Galina-37 [17]

Answer:

D. 114 g

Explanation:

NH4OH molecular weight. Molar mass of NH4OH = 35.0458 g/mol This compound is also known as Ammonium Hydroxide.
Convert grams NH4OH to moles or moles NH4OH to grams. Molecular weight calculation: 14.0067 + 1.00794*4 + 15.9994 + 1.00794.

8 0

3 years ago

What is the atomic model that was found after Bohr’s model and how is it better ?

Lyrx [107]

Schrödinger found the quantum mechanical model of the atom after Bohr’s model.
It is better than Bohr’s model because you can use mathematical equations to find electrons certain position. Unlike Bohr’s which is just a “cloud” where the an electron could possibly be.

8 0

2 years ago

Koja od navedenih atomskih orbitala nije moguća? a) 2d b) 3s c) 4p d) 5f

pickupchik [31]

Answer:

Explanation:

2d nije moguće. moguće je samo 3d do 7d. provjeri periodni sustav!

ako ne razumiješ, obrati mi pažnju

8 0

2 years ago

Describe how this instrument works.<br><br> Operation:

blsea [12.9K]

Answ

Explanation:

that is like a satelite it helps detect signals from like outer space and things

4 0

2 years ago

Read 2 more answers

For the hypothetical reaction: A + B ---> 2C, write an expression that relates the disappearance of A and B to the appearance

forsale [732]

Answer:

Rate expression has been given below

Explanation:

According to the given equation, 1 molecule of A reacts with 1 molecule of B and produces 2 molecules of B at a time.

So, rate of disappearance of both A and B are one half of rate of appearance of B

Hence rate expression can be represented as:

$Rate=\frac{-\Delta [A]}{\Delta t}=\frac{-\Delta [B]}{\Delta t}=\frac{1}{2}\frac{\Delta [C]}{\Delta t}$

where $\frac{-\Delta [A]}{\Delta t}$ is rate of disappearance of A, $\frac{-\Delta [B]}{\Delta t}$ is rate of disappearance of B and $\frac{\Delta [C]}{\Delta t}$ rate of appearance of C

8 0

3 years ago