A gas syringe contains 42.3 milliliters of a gas at 371 K. Determine the volume that the gas will occupy if the temperature is decreased to 254 K.

28.82 mL

Explanation:

This is about gases laws, in this case about  Charles Gay Lussac.

At constant pressure the volume is proportional to the T°.

V₁ / T₁ =  V₂ /T₂

42.1 mL / 371K = V₂ /254K

(42.1 mL / 371K) . 254K

V₂ = 28.82 mL

In conclussion:

As T° was decreased, the volume also decreased too.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current