Answer:
1,100,160J or 262.94 kcal
Explanation:
The juice is frozen at 0 degrees Celsius and I assume that it will become gas at 100 degrees Celsius. So we change the form of the water from solid to liquid, then to gas. That means we have to find out how much heat needed to change water form too, not only the heat needed to increase its temperature.
The latent heat of water is 4.2J/g °C while the heat of fusion is 334 J/g and the heat of vaporization is 2260 J/g. The energy needed will be:
360g * 4.2J/g °C * (110-0°C ) + 360g * 334 J/g + 360g * 2260 /g = 1,100,160J or 262.94 kcal.
Ni(s) + CuSO₄(aq) → Cu(s) + NiSO₄(aq)
Ni + Cu²⁺ + SO₄²⁻ → Cu + Ni²⁺ + SO₄²⁻
Ni + Cu²⁺ → Cu + Ni²⁺
Answer:
54
Explanation:
Given an atom of Tellurium;
Tellurium has an atomic number of 52;
Unknown:
The number of electrons in a -2 anion
Solution:
The atom is;
Te²⁻
A neutral tellurium atom has 52 electrons
When it forms an anion, it becomes negatively charged;
This implies that the number of electrons becomes more,
So, the number of electrons = 52 + 2 = 54
So, the electrons are 54
The answer is "C" #PLATOLIVEZMATTER.