How many nitrogen atoms are there in 4.3 × 1023 moles of nitrogens?

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.