813.5 g sample of gold is heated one place in a calorie meter containing 60 g of water temperature of water increases from 19 Celsius to 20 Celsius the specific heat of gold is 0.130 J/gramsC what was the initial temperature of the gold metal sample

Matter- occupies space and possesses rest massno matter is the opposite

Radon-222 or rn-222 has a half-life of 3.82 days. to determine the fraction of an original sample of rn-222 that remains unchanged after 7.646 days, we calculate the amount of rn-222 remaining after 7.646 days and divide it with the original amount. using 1 gram as a basis and using half-life calculation methods, we can determine that  0.249 or 0.25  grams of rn-222 will remain, and thus the fraction remaining is 0.25 or 1/4.

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

She was of necessity running a grass roots target audience was unlettered