A 2.375-g sample of impure Mn2(CO3)5 is decomposed with heat. 64.33 mL of CO2 is collected over water at a temperature of 40.00oC. The gas is collected at an atmospheric pressure of 755 torr. Water has a vapor pressure of 37 torr at 40.00oC. What is the % Mn2(CO3)5 in the original impure sample? Mn2(CO3)5 → Mn2O5 + 5 CO2

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

What is the atomic number of an atom that has 6 protons