Aside from the reaction proceeding in the test tube, there is a second reaction that occurs when you hold the lit splint inside the lip of the test tube. what are the two reactants for this second reaction? choose one answer from below. choose one answer from below. a) water and oxygen gas. b) carbon dioxide gas and oxygen gas. c) hydrogen gas and oxygen gas. d) magnesium gas and oxygen gas.

the answer is learned

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

its first and third is your answer i did the qustion the fourth isnt right