4.

(1 pt)
if gravity always pushes down, what prevents a person from sinking down into the ground?

a.
nothing prevents a person from sinking into the ground.

b.
gravity only pushes with enough downward force to let a person touch the ground.

c.
a person's body is pushing up, balancing the downward force from gravity.

d.
the earth is pushing up on a person, balancing the downward force from gravity.

D Is the answer

BTW this is a physics question

what's the

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :