Please help! (no links) what is subduction zone?

A ) Where less dense oceanic crust pushes underneath more dense continental crusrt.
B ) Where plates diverge
C ) Where more dense oceanic pushes underneath less dense continental crust
D ) Where plates transform

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false