I would just like the answers without the explanation please 5. 0.2 mol Na2CO3 A
ID: 1028770 • Letter: I
Question
I would just like the answers without the explanation please 5. 0.2 mol Na2CO3 A. 530g, 449 molB. 21.2g, 449 mol C. 530g, 0.051 mol D. 21.2g, 0.040 mol E. 16.6g, 0.051 mol 6. The wt% composition in tin(IV)oxide is %sn--%O (Sn-tin, element # 50 ) A. 21%Sn, 79%O B. 88%Sn, 12%° C. 12%Sn, 88%O D. 94%Sn, 6%O E. 79%Sn 21% 7. A compound has the following wt% composition: 2.1% H, 65.3% 0, 32.6% s. what is its empirical formula? A. H2SO4 8. How many gram Na in 5.00g Na S04 A. 0.035 g 9. A compound containing only carbon and hydrogen has 85.7 wt% C and 14.3 wt%H. Its molar mass is 56 amu. What is its molecular formula? A. C4Hs g: 4.24 g Na CO moles B. H4S2Os C. S4HO2 D. H2SO2 B. 1.31 g C. 1.62 g D. 0.97 g E. 0.81 g B. C2H4 C. C2H D. CH2 E. CH 10. Balance the following reactions. No fractional coefficients, coefficients must be the lowest whole numbers. a) CO2t H20 d) KOH HP04 H20 11. How many g of CO2 are formed from the combustion of 2.9 g of butane, C4Hu with excess oxygen? The balanced reaction is: 2C4H10+ 1002 8CO2 + 10H20 A. 0.26g 12. How many g Iz will react with 20.4 g Al to form All; (aluminum iodide)? As always, first balance the reaction! (Hint this is not a limiting reagent problem) A. 144. g 13. For the balanced reaction: N2(g) + 3H2(g) 2NH3(g). How many moles of NHs will be produced when 0.50 mol Nz reacts with 1.0 mol H2? A. 0.67 mol 14. Calculate the mass of COz formed when 2.3 g of ethanol, C2HsOH reacts with 3.2 g oxygen O2to form CO2 and HzO. (You balanced the reaction in 8.e)! This is a limiting reagent problem! B. 6.6g C. 8.8g D. 10.5g E. 2.2g B. 288. G C. 192. G D. 12 g E. 576 g B. 1.0 mol C. 0.50 mol D. 2.0 mol E. 3.0 mol A. 4.6g B. 2.2g C. 4.4g D. 6.6g E. 2.93gExplanation / Answer
5. D) 21.2 gm, 0.040 mol
6. E) 79% Sn, 21% O
7. A) H2SO4
8. C) 1.62 gm
9. A) C4H8
10. a) 2K + 2H2O = 2KOH + H2
b) 2H2O2 = 2H2O + O2
c) 2C2H6 + 7H2O = 4CO2 + 6H2O
d) 3KOH + H3PO4 = K3PO4 + 3H2O
e) C2H5OH + 3O2 = 2CO2 + 3H2O
11. C) 8.8 gm
12. A) 144 gm
13. A) 0.67 mol
14. E) 2.93 gm