No calculator will show the answer
Answer:
thjvfghjjvvjj
Explanation:
Assume that the set of conditionals is true. Use the Law of Syllogism to
write a true conditional.
8. If two numbers are odd, the
answer is that a
even, then the number is divisible by 2.
Enter your answer.
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Answer:
You determine the weighted averages if the individual isotopic masses.
Procedure:
The atomic mass of Si is the <em>weighted average </em>of the atomic masses of its isotopes.
We multiply the atomic mass of each isotope by a number representing its relative importance (i.e., its percent abundance).
The three stable isotopes of Si are Si-28 (27.98 u, 92.22 %), Si-29 (28.98 u, 4.69 %), and Si-30 (29.97 u, 3.09 %).
Set up a table for easy calculation.
0.9222 × 27.89 u = <em>x</em> u
0.0469 × 28.98 u = <em>y</em> u
0.0309 × 29.97 u = <em>z</em> u
TOTAL = (<em>x</em>+<em>y</em>+<em>z</em>) u = atomic mass of Si.
Answer: 9.18 Litres
Standard Temperature and Pressure (STP). Think of this as the perfect environment where the Temp. is 0°C or 273 Kelvin and Pressure is always 1 atm. This is only true in STP.
This question uses the Ideal Gas Equation:
PV=nRT
P= 1 atm
V = ??
T = 273 K (always convert to Kelvin unless told otherwise)
n = 0.410 mol
R = 0.0821 L.atm/mol.K
What R constant to use depends on the units of the other values. (look at the attachments) The units cancel out and only Litres is left. You simply multiply the values.
The question is incomplete; the complete question is;
Why will the conjugate base of a weak acid affect pH? Select the correct answer below: O it will react with hydroxide
O it will react with water
O it will react with hydronium
O none of the above Content attribution
Answer:
O it will react with hydronium
Explanation:
If we have a weak acid HA, the weak acid ionizes as follows;
HA(aq) ----> H^+(aq) + A^-(aq)
A^- is the conjugate base of the weak acid.
H^+ interacts with water to form the hydronium ion as follows;
H^+(aq) + H2O(l) ----> H3O^+(aq)
The pH=[H3O^+]
But the conjugate base of the weak acid reacts with this hydronium ion thereby affecting its concentration and the pH of the system as follows;
A^-(aq) + H3O^+(aq) ------> HA(aq) + H2O(l)
