2.5 gm of a sample of Nahco3 when strongly.
heated gives 310cc of co2 and 27°c and
760mm hg pr...
Answers: 2
Chemistry, 22.06.2019 13:00
How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide
Answers: 2
Chemistry, 22.06.2019 14:00
The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.
Answers: 3
Chemistry, 22.06.2019 20:20
The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.
Answers: 1
Mathematics, 23.03.2020 21:45
English, 23.03.2020 21:45
Mathematics, 23.03.2020 21:45
Mathematics, 23.03.2020 21:46
Mathematics, 23.03.2020 21:46
Computers and Technology, 23.03.2020 21:46
Mathematics, 23.03.2020 21:46