Answer:
The specific heat of the unknown metal is 1.26*10⁻⁴ 
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat occurs when heat added or removed from a substance causes a temperature change in it and is calculated by:
Q = c * m * ΔT
Where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT (Tfinal - Tinitial) is the variation in temperature
In this case:
- Q= 2.93 kcal
- c= ?
- m= 183.4 g
- ΔT= 126.3 °C
Replacing:
2.93 kcal= c* 183.4 g*126.3 °C
Solving:
c= 1.26*10⁻⁴
<u><em>The specific heat of the unknown metal is 1.26*10⁻⁴ </em></u><u><em></em></u>
When the number of electrons decreases, the charge of the atom becomes more positive.
To calculate the mass, go from atoms to moles and moles to grams:
Atoms ........ Moles.......... Grams
From atoms to moles, use the Avogadro’s no. which is 6.022 x
10^23 and from moles to grams use atomic mass of Pt that is 195.08g.
So, 4.91 x 10^21 Pt atoms x (1 mole Pt / 6.022x10^23 Pt atoms) x (195.08g Pt
/ 1 mole Pt) = 1.59g Pt
Mass of 4.91 x 10^21 Pt atoms = 1.59g Pt
Answer:
Living organisms need water to survive. Many scientists even believe that if any extra-terrestrial exists, water must be present in their environments. All oxygen-dependent organisms need water to aid in the respiration process. Some organisms, such as fish, can only breathe in water. Other organisms require water to break down food molecules or generate energy during the respiration process. Water also helps many organisms regulate metabolism and dissolves compounds going into or out of the body.
Explanation:
The aluminum can with stand <span>0.942 J° C of heat </span>
