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Serggg [28]
3 years ago
13

What is the lon # for Beryllium (Be)?

Chemistry
1 answer:
QveST [7]3 years ago
3 0

Answer:

Number: 4

Charge: +2

Element: Beryllium

I hope this helps!! :)

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Calculate the ph of a 0.25M solution of monochloroacetic acid at 25 c
Phoenix [80]
<h3>Answer: <em>pH=2.25 </em></h3>

Explanation:

monochloroacetic acid  also means: chloroacetic acid

pKa of monochloroacetic acid= 1.4 x 10^-3  (I believe this should have been given in the problem or perhaps in the textbook)

Formula: pH= pKa + log ( some number in M)

pH= -log (1.4 x 10^-3) + log (0.25M)= 2.85 + -0.602= 2.25

pH= 2.25  

8 0
3 years ago
the mass of element Q found in 1.00 mole of each of four compounds is 38.0 grams, 57.0 grams, 76.0 grams and 114 grams.
NemiM [27]

Missing question: A possible atomic weight of Q is?

A)12.7.

B)19.0.

C)27.5  

D)38.0  

E)57.0.

Answer is: possible atomic weight of Q is B) 19.0.

Molecular weight of first molecule is 38.0 g/mol.

Molecular weight of second molecule is 57.0 g/mol.

Molecular weight of third molecule is 76.0 g/mol.

Molecular weight of fourth molecule is 114.0 g/mol.

All four molecular weights can be division only by 19 to get whole number:

Molecule 1 (38 ÷ 19 = 2), molecule 2 (57 ÷ 19 = 3), molecule 3 (76 ÷ 19 = 4) and molecule 4 ( 114 ÷ 19 = 6).

Molecular formulas are than Q₂, Q₃, Q₄ and Q₆.

5 0
3 years ago
Read 2 more answers
Does water and oil mix through,PLease help<br><br><br> I need the answer!!!!!!!!!!!!!!!!!!!!!!
Pani-rosa [81]
Oil has very less density as compared to water, so they never mix through. When, you put both of them in a container, then Oil floats on the surface of water

Hope this helps!
6 0
3 years ago
A balloon contains 7.36 g of oxygen gas (02). How many oxygen molecules
sergey [27]
Answer D. 15 molecules
3 0
2 years ago
The best explanation for the decrease in the amount of energy transferred to each succeeding level is that much of the energy is
Ber [7]
Lost in transition. energy gets transfered all over the place, on an atomic scale and on a larger scale. things like friction and other resistances decrease the amount of energy transfered
7 0
3 years ago
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