How many moles of MgO can be made from 5 moles of Mg?
2Mg + O2 -> 2MgO

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

14. many depressants reduce small muscle control, making it harder for a. you to steer b. your mind to consider complex problems c. the eye to scan, focus, or stay still d. the kidneys to filter alcohol out of the bloodstream

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