84% oo0 T-Mobile LTE 11:37 AM Houston Today 11:34 AM Edit 7. Which of tre falloe

Question

84% oo0 T-Mobile LTE 11:37 AM Houston Today 11:34 AM Edit 7. Which of tre falloeing pairs of aguecus soluions will prodace a grecipitane whon mi zasoa.ag)aed LiClay) c. 0.28 nol D. 26 mel E. 056 mol 10. How many atons are pesen sanple of drorism? A. 135 x 104 a. 1.71x10 C. 8.73x 1o O. 2.16 x 1 E 4.5410 AS II. What is the mass percene of salfar in suife is the mass percen A. B, C. D. of sulurin ufiric asid, Hso 32.69% 31.69% 14.20% 33.02% 34.47% E. 12. What is the molarity of an aqueous scrion of sodiune hydoide prodaced when 35.0 of solution was diluted to 9900 ml? A. 0.0333 M B. 0.212A C. 0.155 A D. 667M E. 1.35 x 10M 13. Which one of the foWlowing is the covrect name fioer TIC A. titanium chioride B. tetrachlorine nitanium C. fitaniom tetrachloride D. titanium(IV) tetrachloride

Explanation / Answer

7)E

8)E

9)0.079/36.5=0.0022mol

10)1mole of Cr=52g of Cr contains 6.023*10^23 atoms

in 1.48g=(1.48/52)*(6.023*10^23)=1.71*10^22 atoms

11)mass% of S=(32/98)*100=32.65%

12) M1*V1=M2*V2

    1*35=M2*980

M2=35/980=0.035M

13)D

14)M=2.73*10^-2M,V=60ml

M=(w/m.w)*(1000/V)

2.73*10^-2=(w*1000)/(150*60)

w=((2.73*10^-2)*150*60)/1000=0.2457g

15) mass of oxygen given is 17.4g

from the balanced equation 32g of oxygen gives 36g of H2O

17.4g of O2 gives=?

so the mass of water=17.4*36/32=19.6g

16) PV=nRT

      P=(W/V)*(RT/M)

       P=dRT/M=>d=PM/RT=(3.1*16)/(0.0821*(76+273))=1.73g/L

17)A

18)P=1380mmHg

    PAr =(mole fraction of Ar)*P=(1.50/(1.27+3.04+1.50))*1380=356mmHg

19) from the balanced equation 16g of methane gives 890.3KJ of heat

      then 7.00g of methane gives=(7*890.3)/16=389.5KJ released.

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