Consider formula A to be v = StartFraction 2 pi r over T EndFraction and formula B to be v2 = Gv = G StartFraction m subscript central Over r EndFraction.. Write the letter of the appropriate formula to use in each scenario. Determine the tangential speed of the moon given the mass of Earth and the distance from Earth to the moon.
Determine the tangential speed of a satellite that takes 90 minutes to complete an orbit 150 km above Earth’s surface.

it is stable as it is in group 0 which have full outer shells of electrons

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol