Last question...I just want to double-check

In the equation, A + B arrow C + D, if the sum of the masses of reactants A and B is known, and the mass of product C is known, then the mass of product D can be calculated.
True or False
(I selected true)

Question

Last question...I just want to double-check

In the equation, A + B arrow C + D, if the sum of the masses of reactants A and B is known, and the mass of product C is known, then the mass of product D can be calculated.
True or False
(I selected true)

anonymous · Answer

@Abhisar

anonymous · Answer

@aaronq OK, OK...promise this is the last one
Should be a quick one

aaronq · Answer

yep, mass i never lost, so if you know all but one: $(m_A+m_B)-m_C=m_D$

anonymous · Answer

woohoo, I guessed right.
Now submitting, I'll let you know what I get :D

aaronq · Answer

cool cool.  you shouldnt be guessing though :S haha

anonymous · Answer

well, I got one wrong, but I can defend it and most likely get the points back, so there. :D

anonymous · Answer

Yeah, I know
Part of it is that the reading sucks, and the other part is my piss poor understanding of chemistry