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Rasek [7]
3 years ago
12

Which of these terms describes the number of protons in the nucleus of an atom?

Chemistry
2 answers:
Leokris [45]3 years ago
6 0
Is it B................
salantis [7]3 years ago
6 0
I believe the correct answer is choice D. Atomic number.

hope this helps!
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Which is the odd one brass,copper, aluminum,iton , sapphire​
zavuch27 [327]

Sapphire.

It  is a stone not a metal.

4 0
2 years ago
Read 2 more answers
PH CHEM, PLEASE HELP QUICK! NO LINKS/VIRUSES PLEASE!
Contact [7]

Answer:

The pH of the solution is 11.48.

Explanation:

The reaction between NaOH and HCl is:

NaOH  +  HCl  →  H₂O  +  NaCl

From the reaction of 3.60x10⁻³ moles of NaOH and 5.95x10⁻⁴ moles of HCl we have that all the HCl will react and some of NaOH will be leftover:

n_{NaOH}} = n_{i_{NaOH}} - n_{HCl} = 3.60 \cdot 10^{-3} moles - 5.95 \cdot 10^{-4} moles = 3.01 \cdot 10^{-3} moles

Now, we need to find the concentration of the OH⁻ ions.

[OH^{-}] = \frac{n_{NaOH}}{V}

Where V is the volume of the solution = 1.00 L                

[OH^{-}] = \frac{n_{NaOH}}{V} = \frac{3.01 \cdot 10^{-3} moles}{1.00 L} = 3.01 \cdot 10^{-3} mol/L

Finally, we can calculate the pH of the solution as follows:

pOH = -log([OH^{-}]) = -log(3.01 \cdot 10^{-3}) = 2.52

pH + pOH = 14

pH = 14 - pOH = 14 - 2.52 = 11.48

Therefore, the pH of the solution is 11.48.

I hope it helps you!

3 0
3 years ago
A container with two gases, helium and argon, is 30.0% helium. Calculate the partial pressure of helium and
iVinArrow [24]

Answer:

helium=1,2atm

argon=2,8atm

Explanation:

partial is pressure exerted by each gas in a system since 30% is helium it means 70% is argon

argon =70%x4

helium=30%4

4 0
2 years ago
How is Hess's law used to measure enthalpy of a desired reaction?
Morgarella [4.7K]

Answer:

D

Explanation:

I hope this is correct

6 0
3 years ago
Which formula represents Carbonic acid
Degger [83]

Answer:

H2CO3 represents carbonic acid

8 0
3 years ago
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