Answer:
droughts in California have become more common in California
Explanation:
Climate is weather over time which means that the first and the third one are just isolated incidents and the last answer choice shows climate but it doesn't show a change in climate
Answer:
pH = 10
The solution is basic.
Explanation:
A solution contains 1 × 10⁻⁴ M OH⁻ ions. First, we will calculate the pOH.
pOH = -log [OH⁻]
pOH = -log 1 × 10⁻⁴
pOH = 4
We can find the pH of the solution using the following expression.
pH + pOH = 14.00
pH = 14.00 - pOH = 14.00 - 4 = 10
Since the pH > 7, the solution is basic.
Answer:
Boiling point: physical
Density: physical
Ductility: physical
Heat of combustion: chemical
Explanation:
Chemical properties can only be analyzed by putting the substance through a chemical reaction, such as combustion.
Physical properties can be analyzed without altering the substance chemically. With that in mind:
Answer:
B. A few elements can combine to form a compound
Explanation:
- An <u>element</u> is a substance that cannot be chemically broken down into simpler substances. (THESE ARE IN THE PERIODIC TABLE OF THE ELEMENTS)
- A <u>compound</u> is a substance composed of two or more elements in fixed, definite proportions.
<em>Source: Tro Nivaldo J.. Principles of Chemistry (p. G-4). Pearson Education. Kindle Edition. </em>
