The following weighings were made during a laboratory exercise: Mass of evaporating dish59.260 g
Mass of sugar sample 1.61 g

The mass of the evaporating dish has how many number of significant figures?
(A) two (B) three (C) five (D) four

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.