Assuming no phase transition, what is the change in temperature (°C) if 310.0 mL ethanol (molar mass 46.08 g/mol) absorbs 4.50 kJ of heat? The density of ethanol is 0.789 g/mL and the molar heat capacity of ethanol is 109.5 J/mol･°C.

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.

it would take 7/10 of an hour too fill the pool.

step-by-step explanation:

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: