1.How much heat must be supplied to a 300.0 g iron pan to raise the temperature of the pan from 30.5 degrees * C to 99.5 °C. 2.How much heat is needed to change 275 g of ice at 0degreesC to water at 0°?

3.How much heat must be supplied to a 575.0 g aluminum pan to raise the temperature of the pan from 12.5 degrees C to 110.5 °C

4.How much energy does a refrigerator remove from 100.0 g of water at 30.0°C to make ice at - 15.0 degrees * C ?

5.A 85.0 g sample of metal is warmed 24.0 °C when 65.0 calories is added. What is the specific heat of this metal?

Just the answers please.

An  atom  (ours, not carroll's) consists of a positively charged  nucleus, surrounded by one or more negatively charged particles called  electrons. the positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen. although the nucleus is heavy, it is quite small compared with the overall size of an atom. the radius of a typical atom is around 0.1 to 0.25 nanometres (nm), whereas the radius of a nucleus is about 10-6  nm.  *  if an atom were enlarged to the size of the earth, its nucleus would be only 200 feet in diameter and could easily rest inside a small football stadium.read more on -

Answer:   [a]:   "slate" .

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward