The volume of an ideal gas is increased from 0.61 m3 to 3.9 m3 while maintaining a constant pressure of 970 Pa (1 Pa = 1 N/m2). If the initial temperature of the gas is 65 K, (a) What is the final temperature of the gas?

416K

Step-by-step explanation:

Given:

Initial volume = 0.61 m^3 => 610L

Final volume = 3.9 m^3 => 3900L

Initial temperature = 65 K

Final temperature =?

Charles law states that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature.

Therefore,

/ = /

610/ 65 = 3900 /

= (3900 x 65) / 610

=  415.5 K ≈ 416K

The final temperature of the gas is 416K

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the answer is 24

step-by-step explanation: