hydrogen gas, H2(g) is collected over water at 20.0C. The total pressure of hydrogen gas and water vapor is 753 mmHg and the vapor pressure of water is 17.5 mmHg. Using Dalton's of partial pressures, you can find the pressure of the hydrogen to be 735.5 mmHg. Is this pressure to the correct number of significant digits according to the pressures used to calculate it?
sorry i was late, but i don't know what assignment your talking about, i'm in flvs as well, im in earth space science. but u are behind pace bc every class should be in the 3's or 4'
c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.
s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.
answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol
explanation :
let us write down the given equations
equation 1 :
equation 2 :
equation 3 :
let us use hess's law to find out which 2 equations can be added to get the third equation.
let us reverse equation 2 and multiply it by 2. the new equation that we get is,
equation 4 :
let us add equation 1 & 4
the above equation is similar to equation 3 but has different value for dhrxn.
therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol