Answer: A) 1s22s22p63s23p63d104s24p5
Answer:
ruler
Explanation:
that's what we call a ruler
Answer:
1) The neutralization reaction will mot be completed.
2) pH = 0.6.
Explanation:
<em>1) Will the neutralization reaction be completed?</em>
For the neutralization reaction be completed; The no. of millimoles of the acid must be equal the no. of millimoles of the base.
The no. of millimoles of 125 mL of 2.0 M HCl = MV = (2.0 M)(125.0 mL) = 250.0 mmol.
The no. of millmoles of 175 mL of 1.0 M NaOH = MV = (1.0 M)(175.0 mL) = 175.0 mmol.
∴ HCl will be in excess.
∴ The neutralization reaction will mot be completed.
<em>2) If not what is the pH of the final solution?</em>
[H⁺] =[ (MV)HCl - (MV)NaOH]/V total = (250.0 mmol - 175.0 mmol) / (300.0 mL) = 0.25 M.
∵ pH = - log[H⁺]
<em>∴ pH =</em> - log(0.25) =<em> 0.6.</em>
Are there options to choose from? It could be apatite
This problem is describe the mole-ratio composition of an allow composed by tin, lead and cadmium. Ratios are given as Sn:Pb 2.73:1.00 and Pb:Cd is 1.78:1.00, and we are asked to calculate the mass percent compositon of Pb in the allow.
In this case, according to the given information, it turns out possible realize that the following number of moles are present in the alloy, according to the aforementioned ratios:
Next, we calculate the masses by using each metal's atomic mass:
Thus, the mass percent composition of each metal is shown below:
So that of lead is 34.9 %.
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