Discussion Worksheet 3-TA-keys PDF

Preview

Summary

discussion worksheet answer key...

Description

Discussion(Worksheet(3( ( 1.(What(is(the(formula(for(potassium(carbonate?! ! ! a) KCO3! b) K(CO3)2! c) K2CO3! d) KCO6! ! ! c) K2CO3! ! ! 2.(Which(sample(represents(the(greatest(number(of(moles?( ( a) 44.01!g!CO2! b) 1.0!moles!C3H8! c) 6.022!x!1023!molecules!C4H10! d) 18.02!g!H2O! e) All!of!the!sample!have!the!same!number!of!moles.!! ! e)!All!of!the!sample!have!the!same!number!of!moles.!! ! 3.!What(is(the(empirical(formula(of(a(compound(containing(C,(H,(and(O(if( combustion(of(3.69(g(of(the(compound(yields(5.40(g(of(CO2(and((2.22(g(of(H2O?! ! a) CH3O! b) C2H3O! c) CHO! d) C2H3O2! e) CH2O! ! e)CH2O( ( ( ( ( ( ( ( ( ( ( ( (

( 4.(What(are(the(coefficients(for(the(decomposition(of(nitroglycerin?( ! __!C3H5N3O9!!à฀!!__!N2!!+!!__!CO2!!+!!__!H2O!!+!!__!O2! ! a) 2,3,6,2,1! b) 2,3,6,5,1! c) 4,6,12,10,12! d) 4,3,12,10,1! e) 4,6,12,10,1! ! e)4,6,12,10,1( ( ( 5.( Calculate the mass (in g) of 2.1 x 1024 atoms of Tungsten. Tungsten has an atomic number of 74 and an atomic mass of 183.84 amu. Avo # = 6.022 x 1023/mole 2.1e24*183.84/6.022e23=6.4e2 E

!...