Final answer:
The charge of one ruthenium nucleus is +1.60 x 10^-19 C. To calculate the number of nuclei needed to add up to +1.00 C of charge, divide the total charge by the charge per nucleus. The answer is 6.25 x 10^18 nuclei.
Step-by-step explanation:
The charge of an individual ruthenium nucleus can be determined by considering the charge of a proton. Each proton has a charge of +1.60 x 10-19 C. Therefore, the charge of one nucleus of ruthenium is also +1.60 x 10-19 C.
To calculate how many ruthenium nuclei are needed to add up to +1.00 C of charge, we divide the total charge by the charge of one nucleus:
Number of nuclei = Total charge / Charge per nucleus = 1.00 C / (+1.60 x 10-19 C) = 6.25 x 1018 nuclei