It could pass by a large enough object that has enough gravity to pull the object into its orbit and the object would stay in orbit because it has centripetal force.
The correct option is A.
A chemical reaction is said to have reached an equilibrium stage if the rate of reaction of the forward reaction is equal to the rate of reaction of the reverse reaction. Two way arrows are usually used to depict equilibrium reactions. These arrows indicate that the chemical reaction can move both ways. At the equilibrium point the concentrations of both the reactants and the products are equal.
To calculate ΔH of reaction, let's use the following formula
ΔH of reaction= [ΔH of products] - [ΔH of reactants]
note: keep in mind that you have to multiply each value by its coefficient.
ΔH of reaction= [ ΔH CO2 + ΔH H2O + ΔH Na2CO3] - [ΔH NaHCO3]
ΔH of reaction = [ -393.5 + -241.8 + -1130.9] - [ 2 x -947.7]
ΔH of reaction= 129.2 kJ
since ΔH is positive, the reaction is endothermic
Join in tracks are designed with extra space to allow for friction in hot weather