Answer:
Density= 1.7g/dm3
Explanation:
Applying
P×M= D×R×T
P= 2atm, Mm= 28, D=? R= 0.082, T= 400K
2×28= D×0.082×400
D= (2×28)/(0.082×400)
D= 1.7g/dm3
Sodium and magnesium oxides are alkaline. Aluminium oxides are amphoteric (reacting both as a base or acid). Silicon, phosphorus, sulfur, and chlorine oxides are acidic. Some non-metal oxides, such as nitrous oxide (N2O) and carbon monoxide (CO), do not display any acid/base characteristics.
Yes sir I’m not sure why what I said so yes sir I’m not gonna go to the bathroom I’m just gonna go home I’m gonna be there in about a week or two I don’t uueiueyey
Taking into account the definition of pH and pOH, the [OH⁻] is 7.08*10⁻¹⁰ M.
First of all, pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:
pH= - log [H⁺]= - log [H₃O⁺]
Being [H₃O⁺]=1.40×10⁻⁵ M, the pH is calculated as:
pH= - log (1.40×10⁻⁵ M)
Solving:
<u><em>pH= 4.85</em></u>
<u><em /></u>
Similarly, pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:
pOH= - log [OH⁻]
The following relationship can be established between pH and pOH:
pOH + pH= 14
Being pH= 4.85, pOH is calculated as:
pOH + 4.85= 14
pOH= 14 - 4.85
<u><em>pOH= 9.15</em></u>
<u><em /></u>
Replacing in the definition of pOH the concentration of OH⁻ ions is obtained:
- log [OH⁻]= 9.15
Solving
[OH⁻]= 10⁻⁹ ¹⁵
[OH⁻]= 7.08*10⁻¹⁰ M
In summary, the [OH⁻] is 7.08*10⁻¹⁰ M.
Learn more:
Answer:
DNA is found in the cytoplasm of prokaryotes
Explanation:
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion