3 years ago

When using science to investigate physical phenomena, which characteristic of the event must exist?

1 answer:

5 0

"Observable" is the one characteristic of event that must exist when <span>using science to investigate physical phenomena. </span>

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The diagram below represents the rock cycle.

spayn [35]

Answer:

Heat and Pressure

Explanation:

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3 years ago

You have a solution that is 0.02M formate (HCOO-) and 0.03M formic acid (HCOOH), which has a Ka of 1.8x10-4. What is the pH of t

lisov135 [29]

Answer:

3.6

Explanation:

Step 1: Given data

Concentration of formic acid: 0.03 M

Concentration of formate ion: 0.02 M

Acid dissociation constant (Ka): 1.8 × 10⁻⁴

Step 2: Calculate the pH

We have a buffer system formed by a weak acid (HCOOH) and its conjugate base (HCOO⁻). We can calculate the pH using the <em>Henderson-Hasselbach equation</em>.

$pH = pKa +log\frac{[base]}{[acid]} = -log 1.8 \times 10^{-4} + log \frac{0.02}{0.03} = 3.6$

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Currents from the lava

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yawa3891 [41]

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3 years ago

Are all mixtures solutions?

marin [14]

Answer:

Not all mixtures are solutions. A solution is a specific term that describes an even or homogeneous mixture of a solute, the substance being mixed, in a solvent, the substance that is in a greater amount in which the solute dissolves. All solutions are mixtures because it is two or more substances mixed together.

Explanation:

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3 years ago