The forces exerted on an object are shown. help asap (i will mark brainliest)

A box has an arrow pointing down labeled F and an arrow pointing up labeled 5 N.

Which of the following happens when F is less than 5 N?

The object moves up.

The object moves down.

Balanced forces keep the object stationary.

Balanced forces keep the object's speed constant.

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

An alpha particle is: a hydrogen atom a nucleus of helium two neutrons an electron