HELP !!! What is the final volume of a 400 ml gas sample that is subjected to a temperature change from 22°C to 30°C and a pressure change from 760mmHg
to 360mmHg?

[a] 619ml
[b] 1151ml
(c) 105ml
[d] 867ml

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j