Calculate the number of moles in 17g of MgSO4​

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here