is scientific knowledge established through direct observation and remains constant. scientific knowledge can change
when scientists

The answer is c. 320 g

Idon't know hope someone you

B.1 - hydrogren-1 can only mean there is 1 neutron. it's obvious there is 1 proton or else it wouldn't be hydrogen, so they wouldn't put a number after it unless they were indicating the number of neutrons

Ihope this you.