Answer:
qreleased = -273J.
Explanation:
Hello there!
In this case, according to this calorimetry question, and keeping in mind that the hot substance releases heat to the cold substance which absorbs it, according to:
-qreleased = qabsorbed
In such a wat, since the water absorbs 273 J of heat and no heat is lost, the amount of this measurement released by the metal is:
-qreleased = 273J
qreleased = -273J
Regards!
Answer:
LITHIUM-ION.
Explanation:
ATOMIC STRUCTURE -
The smallest unit has the characteristics property of an element.
An atom consists of electron revolving around the nucleus in fixed orbits.
The Nucleus is a centrally located mass formed by the protons and the neutrons.
The atomic mass of an element is given as the sum of the protons and neutrons.
The Atomic number is equal to the number of protons or electrons.
In the given element element,
Atomic mass = 3 + 4 = 7
Atomic number = 3
As the number of protons in the atom is greater than the number of electrons by 1. Therefore, the element is a cation.
The element with atomic number 3 and atomic mas 7 is LITHIUM-ION.
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<span>According to the law of conservation of mass, the masses of the products and reactants must be the same. Adding calcium to the product side is considered a mistake if it is not in the reactant side of a particular chemical equation because it is impossible to produce calcium from thin air (unless this is a nuclear reaction).</span>
