Answer:
On January 22, 2001, EPA adopted a new standard for arsenic in drinking water of 0.01 mg/l or 10 parts per billion (ppb), replacing the old standard of 50 ppb. Water systems had to meet the new standard by January 23, 2006.
Explanation:
Because u might have made a mistake on the first investigation so u want to repeat it a few more times
I am not sure but I think the answer is B the Andes glaciers will disappear
Answer:
2 KClO³ ------ 2KCl + 3O2
Atoms are electrically neutral because they have equal numbers of protons positively charged and electrons negatively charged.
