Answer: A persistent or non-volatile chemical agent can remain on a surface for more than 24 hours.
Explanation:
Non-volatile substance is defined as the one which does not readily evaporate into its surrounding. Generally, a non-volatile substance has strong intermolecular forces between its molecules.
A non-volatile substance will take more than 24 hours to remain on the surface.
On the other hand, a substance with weak intermolecular forces present in its molecules will readily evaporate into the atmosphere.
For example, acetic acid is a volatile substance and quickly evaporates into the atmosphere.
Thus, we can conclude that a persistent or non-volatile chemical agent can remain on a surface for more than 24 hours.
Answer:
NO2
Explanation:
The empirical formula represents the simplest whole number ratio of the elements in a compound. According to the question;
30.4% represents 30.4g of nitrogen
69.6% represents 69.6g of oxygen
First, we convert each mass value to mole by dividing by their respective molar masses as follows:
N = 30.4/14 = 2.17mol
O = 69.6/16 = 4.35mol
Next, we divide each mole value by the smallest (2.17)
N = 2.17/2.17 = 1
O = 4.35/2.17 = 2.0046
Approximately, the ratio of N to O is 1:2, hence, the empirical formula is NO2
Answer:
Toxins can contribute to water pollution by the use of fertilizers. ... Another contaminate to water are algal blooms, which result as an increased amount of carbon dioxide in the air. As CO2 is increased this make nutrients needed for algal blooms more readily available.
Explanation:
https://www.google.com/search?q=How+do+toxins+contribute+to+water+pollution%3F&rlz=1CAQZUX_enUS862&oq=How+do+toxins+contribute+to+water+pollution%3F&aqs=chrome..69i57j0l4j69i61.344j0j7&sourceid=chrome&ie=UTF-8