Answer: c
Explanation:
during the industrial revolution americans were switching from rural to urban life, thus using up more fossil fuels, and working in factories
Answer:
POLAR COVALENT
Explanation: A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal. In a polar covalent bond, sometimes simply called a polar bond, the distribution of electrons around the molecule is no longer symmetrical.
Erica is likely to use reverse osmosis process.it is the method used in the industry to treat water in oil and gas industry .or ultra filtration method is also employed
It’s mass number would be 5 as it’s the protons and the neutrons added together