Answer:
Secondary research
Explanation:
Secondary research involves using already existing data, like what can be found in in books, articles, and electronic databases.
A is wrong. Primary research is the research that you do to obtain new information, as in experiments or in interviews and surveys.
B is wrong. Qualitative research is the gathering of non-numerical data.
C is wrong. Summative research is done at the end of a project to determine its success. It can also point the way to future research projects.
Fluorine in compounds is always assigned an oxidation number of -1
Hi!
The generic equation showing how a weak base ionizes water is the following:
B(aq) + H₂O(l) ⇄ BH⁺(aq) + OH⁻(aq)
A base is described as weak when its dissociation is difficult and isn't complete. Weak Bases are chemical compounds that accept protons from water, to form the conjugate acid and the OH⁻ ion. The pH of the solution of a weak base is higher than 7. Some weak bases include ammonia (NH₃), Aluminum Hydroxide (Al(OH)₃) and Sodium Acetate (CH₃COONa).
Have a nice day!
Answer:
molecular compound
Explanation:
it has two or more nonmetal elements and are covalently bonded
<u>Answer:</u> 
metric tons of oxygen is present.
<u>Explanation:</u>
We are given:
Mass of oxygen in atmosphere = 
To convert it into metric tons, we use the conversion factors:
And,
Converting short tons into pounds, we get:
Now, converting the given mass in pounds to metric tons, we get:
Hence, metric tons of oxygen is present.
