Asample of helium gas is placed in a rigid cylinder that has a movable piston. the volume of the gas is varied by moving the piston, while the temperature is held constant at 273 k. the volumes and corresponding pressures for three trials are measured and recorded in the data table below. for each of these trials, the product of pressure and volume is also calculated and recorded. for a fourth trial, only the volume is recorded.
state evidence found in the data table that allows the product of pressure and volume for the fourth trial to be predicted.

it would be d. henry moseley

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a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o