The volume of a sample of gas is 2.8 L when the pressure is 749.5 mm Hg and the temperature is 31.2 C. What is the new temperature in degrees Celsius if the volume increases to 4,3 L and the pressure increases to 776.2 mm Hg?
A. 280C
B.120C
C.480C
D.210C

In a laboratory determination of the atomic weight of tin, a sample of tin is weighed in a crucible. nitric acid is added, and the reaction proceeds to give a hydrated tin(iv)oxide plus no2and h2o. the hydrated tin(iv)oxide is then heated strongly and reacts as follows: sno2.xh2o(s)sno2(s)+ xh2o(g)the sno2is finally cooled and weighed in the crucible. explain the effect on the calculated atomic weight of tin that would result from each of the following experimental errors: (a)considerable spattering occurs when the nitric acid is added to the tin.(b)the hydrated tin(iv)oxide is not heated sufficiently to change it completely to tin oxide.