A student determined the mass of a substance to be 28g. If the true value is 30g, what is the percent error in the student's determination? A) -7.14%
B) -6.67%
C) 7.14%
D) 6.67%

If a reaction has g of -136kj at 110°c, will it be spontaneous at this temperature (110°c)? yes or no

Which of these reactions are redox reactions? check all that apply.cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

What is the mass of each element in a 324.8 sample of co2