Answer:
I believe the answer is a
Explanation:
Painting does not save the chemical structure for preserving metals.
If this helped can i please have brainliest?
The single combination of pressure and temperature at which liquid water, solid ice, and water vapor can coexist in a stable equilibrium occurs at approximately 273.1575 K (0.0075 °C; 32.0135 °F) and a partial vapor pressure of 611.657 pascals (6.11657 mbar; 0.00603659 atm).[4][5] At that point, it is possible to change all of the substance to ice, water, or vapor by making arbitrarily small changes in pressure and temperature. And the temperature is called Triple point
<h3>Answer:</h3>
Formic acid is the stronger acid.
<h3>Explanation:</h3>
The strength of an acid is determined by the power of it to dissociate and produce H⁺ ions. Greater the dissociation of an acid, the stronger that acid is. Also, extent of dissociation for particular acid is given by its dissociation constant i.e. Ka.
The greater the Ka value, the stronger an acid is and vice versa.
Calculating Ka value of Pivalic acid:
As,
pKa = -log [Ka]
So,
Ka = 10^-pKa
Putting value of pKa,
Ka = 10⁻⁵
Ka = 1.0 × 10⁻⁵
Calculating Ka value of Formic acid:
As,
pKa = -log [Ka]
So,
Ka = 10^-pKa
Putting value of pKa,
Ka = 10⁻³'⁸
Ka = 1.58 × 10⁻⁴
<h3>Conclusion:</h3>
As the Ka value of Formic acid is greater than Pivalic acid therefore, it is stronger acid than Pivalic acid.
<h2>TIP:</h2>
When comparing strength of acids, the acid with the lowest pKa value is considered the strongest acid and <em>vice versa</em>.
40g(1mol NH3/17.04g per mol), N2's molar mass=28.02g
3CuO+2NH3=>3Cu+N2+3H2O
(2.3473mol NH3)(1 mol N2/2 mol NH3)(28.02g/1mol)=32.8873g N2
15.5/32.8873=47.1306% yield
Answer is: near equivalence point indicator should change color, so we must pick indicator who changes color near pH of equivalence point.
Equivalence point is
the point which there is stoichiometrically equivalent amounts of acid and
base. <span>
<span>Chemist can draw pH curve (graph
showing the change in pH of a solution, which is being titrated) for
titration and determine equivalence point.</span></span>
