Answer:
12.5 g
Explanation:
If element R's half life is 2 minutes then we need to divide 100 g by 1/2 3 times. 100/2 = 50/2= 25/2= 12.5 g.
Hope this helps!
Answer:
- Acetic acid (CH₃COOH) and hydronium ion (H₃O⁺)
Explanation:
Hello,
In this case, based on the acid-base theory which states that acids are known as H⁺ donors, if we consider the direct reaction:

It is clear that the acetic acid is the first H⁺ donor as it losses one H⁺ to turn into the acetate ion. Moreover, if we consider the inverse reaction:

It is also clear that the hydronium ion is the second H⁺ donor as it losses one H⁺ to turn into water.
Best regards.
Answer:
D
Explanation:
strong winds carried marine organisms inland where they were buried and fossilized under layer of sediment
The answer is 1- 4.18 KJ !
Answer is: solubility
of silver iodide is 9.11·10⁻⁹ M.<span>.
silver iodide in water: AgI(s)</span> → Ag⁺ + I⁻.<span>
Ksp = 8.3</span>·10⁻¹⁷.<span>
[Ag</span>⁺] =
[I⁻] = x.<span>
Ksp = [Ag</span>⁺] ·
[I⁻].
8.3·10⁻¹⁷ = x².<span>
x= √</span>8.3·10⁻¹⁷.<span>
x = [Ag</span>⁺] =
[I⁻] = 9.11·10⁻⁹ mol/L.<span>
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