How many calories are released when 500 g of water cools from 95.0°c to 25.0°c?

                  35,000 cal  will released.

Explanation:

By definition 1 kcal (=1000 calorie) is the approximate amount of energy released when the temperature of 1.000 kg of water is lowered by 1.000 °C (at a pressure of one atm.). It is about 4.2 kJ of energy.

                                   q = mC∆T

where q = heat (calories);      m = mass (500g);        C = specific heat (1 cal/g/deg);           ∆T = change in temp.                                                                                                    Thus,

              q = (500 g)(1 cal/g/deg)(95-25) = (500)(1)(70) = 35,000 cal

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.