What is a system called when neither energy nor matter is exchanged between the system and the surroundings?

A) Closed system
B) Free energy
C) Isolated system
D) Open system

Determine the reaction and balance the following equations urgent due in the morning

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas

Acm ruler with main graduations from 1 to 10 from left to right there are 10 secondary graduations between each of the main graduations there is a line that begins. at the left end of the ruler 10 secondary graduations to the left of the “1 main graduation the right end of the line ends on the eighth secondary graduation to the right of 3 how long is the line