A student measures out 2 00L of a 2 10M sodium chloride

a 2 pts Choose the correct operation for calculating the mass m b 3 pts Given that N 23 48x1024 the correct operation after sub ber of entities N Avogadro s number m mass and M molar mass m c 5 pts The mass of 23 48x1024 Ar atoms is Unit 23 48x10 24 6 022 10 23 23 48x10 24 40 23 48x10 24 x 6 022x10 23 40 23 48x10 24 6 022x10 23 23 48x10 24 6 022x10 23 x 40 6 022x10 23 x 40 23 48x10 24 Suppose that you are required to calculate the mass m of a certain number of Ar atoms N where N number of entities N Avogadro s number m mass and M molar mass m a 2 pts Choose the correct operation for calculating the mass m b 3 pts Given that N 23 48 1024 the correct operation after substituting the correct values looks like 3 534 10 47 5 869 10 23 38 98 1559 1 026 2 408 10 25 mework Lab Sery one C h toms is m c 5 pts The mass of 23 48x1024 Ar atoms is Unit N M N N XM N M N N Suppose that you are required to calculate the mass m of a certain number of Ar atom where N number of entities N Avogadro s number m mass and M molar mass NxM N N XN M a 2 pts Choose the correct operation for calculating the mass m b 3 pts Given that N 23 48 1024 the correct operation after substituting the correct 4 rect values looks like c 5 pts The mass of 23 48x1024 Ar atoms is Unit www Male G Suppose that you are required to calculate the mass m of a certain where N number of entities N Avogadro s number m mass and M a 2 pts Choose the correct operation for calculating the mass m b 3 pts Given that N 23 48 1024 the correct operation after substi

e a 2 pts Choose the correct operation for calculating the number of moles of Ar b 3 pts Given that m 7 55 g the correct operation after substituting the correc c 5 pts The number of moles of Ar atoms is Unit n Imber of entities N Avogadro s number m mass and M molar mass 7 55x40 7 55 6 022 x 10 23 7 55 40 7 55 6 022 x 10 23 7 55 40 7 55x 6 022 x 10 23 72 Suppose that you are required to calculate the number of moles of Ar atoms in a certain mass m of Ar where N number of entities N Avogadro s number m mass and M molar mass a 2 pts Choose the correct operation for calculating the number of moles of Ar b 3 pts Given that m 7 55 g the correct operation after substituting the correct values looks like c 5 pts The number of moles of Ar atoms is Unit D moles of Ar atoms is Unit 4 547 10 24 47 55 0 1888 n 1 254 10 23 302 6 022 10 23 Suppose that you are required to calculate the number of moles of Ar atoms in a certain m where N number of entities N Avogadro s number m mass and M molar mass certain mass m of Ar a 2 pts Choose the correct operation for calculating the number of moles of Ar b 3 pts Given that m 7 55 g the correct operation after substituting the correct values la m M m M m N m N mxN mxM c 5 pts The number of moles of Ar atoms is Unit oks like L 40 www uate 20 10 Suppose that you are required to calculate the number of moles of Ar at where N number of entities N Avogadro s number m mass and M 1 a 2 pts Choose the correct operation for calculating the number of mole b 3 pts Given that m 7 55 g the correct operation after substituting the

hould have aragraph For Questions 31 32 Dehydration of salts is an important class of heterogeneous reactions The salt hydrates during dehydration often dissociates in steps to form a number of intermediate hydrates according to the prevailing pressure of moisture in contact with the solid hydrates Thus copper sulphate pentahydrate solid on dissociation yields trihydrates solid monohydrates solid and then the anhydrous salt solid in the above order as follows Pressure mm of lig CuSO4 5 H O CuSO3 H O SO4 H O 2H O g PH 0 5 6 CuSO H O CuSO4 H O g PH O 0 8 CuSO4 3 H O 2H O g PH 0 7 8 Moles of water moles of CuSO The equilibrium constant K in the unit of mm for the equilibrium between entahydrate and trihydrate is

3 pts each The atom with Z 16 a The atomic symbol is b The name of this atom is c This atom is in group d This atom is in period e This atom is classified as f The predicted ionic charge is 2 Ag sodium 6A 16 Na 2 iodine metalloid 2A 2 Ba nonmetal carbon barium C 5 S 1 silver 3 sulfur metal main gro 7A 17 22 27 37

3 04 A solution containing 4 M Cr O 2 M Cr shows a pH of 2 0 Calculate reduction potential 2 303 RT F of half cell reaction 0 06 E Cr 0 Cr 1 33 V A 0 5 V B 0 7 V C 1 05 V D 1 50 V

How to find atomic mass of an elemen t I know you will say Number of proton s Number of neutrons for example ox ygen atomic 16 8 8 Number of pro tons Number of neutrons but how the chlorine have mass of 35 5 amu I know also this very well Because of the average mass of their isotopes b ut I want to know that oxygen also have isotopes but its atomic mass Number of protons Number of neutro ns why in the case of oxygen we don t c alculate the average of the mass of thei risotopes

data Based on the R2 factor and the percent relative uncertainty for the data what correlation can you make If a correlation is determined discuss possible R2 factor 0 98346808 P R U of the slope x 100 1 69

The temperature at which carbon reduced FeO into iron produces CO is 200 3 4 Correct Answer 4 Your Answer 3 4 Jour AG kJ 300 400 500 600 700 200 0 200 2Fe 0 2FeO Below temprature at point A Approx same temprature at point A Above than point A but below then point D temprature Above at point A temprature C 0 CO 20 0 200 400 800 1200 1600 2000 Temperature C POUR SELL UnationTZUEGUIUGIT rate 16 0

provided as 37 Match the following Condition for the reaction to be favoured in forward direction COLUMN I A CO g H O 1 H CO aq AH 10kj mol B CO g 2H g CH OH g AH 91kj mol C N O g 2 NO g AH 57 2kJ mol D N g O g 2NO g AH 90 kJ mol A A p s B s C q r D q C A p B p s C q D q COLUMN II p Low temperature q High r s High B A p s B s C q r D q r D A p s B p s C q r D q temperature Low pressure pressure

16 2 mole of zinc is dissolved in HCl at 25 C The work done in open vessel is a 2 477 kJ c 0 0489 kJ b 4 955 kJ d None ogged by 2 C at constant TAL