2, 1, 2
Explanation:
Given equation of reaction:
Li + Br₂ → LiBr
In balancing any chemical equation, they must obey the law of conservation of matter. This law suggests that the number of moles of reactants and products must be the same in a chemical reaction.
This suggests that no amount of matter is lost during a chemical reaction.
The reaction above is a combination reaction in which two species combines to give a product.
To balance chemical reactions, we can simply inspect and assign the appropriate coefficient to the reactants and products. The coefficients should be whole numbers.
Also, the approach here would be mathematical where we would derive simple and solvable algebraic expressions to address the problem.
Assign alphabets a, b and c to the species;
aLi + bBr₂ → cLiBr
Conserving Li; a = c
Br; 2b = c
let b = 1;
c = 2
a = 2
The coefficients are 2, 1 and 2
The balanced equation is:
2Li + Br₂ → 2LiBr
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Balanced chemical equation brainly.com/question/2947744
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Answer:
B. To change from a liquid state to a solid state is called Freezing
Answer:
the answer is letter B,FALSE
Answer:
Molecular formula for Dioxybenzone is C₁₄H₁₂O₄
Explanation:
Percent composition:
In 100 g of compound → 4.92 g are H
In 100 g of compound → 26.8 g are O
In 100 g of compound → 68.28 g are C
Let's convert the mass to moles by molar mass:
4.92 g / 1 g/mol = 4.92 moles H
26.8 g / 16 g/mol = 1.67 moles O
68.28 g / 12 g/mol = 5.69 moles C
Now we can apply a rule of three:
100 g of compound have 4.92 moles H, 1.67 moles O, 5.69 moles C
244.25 g of compound must have:
(244.25 g . 4.92 m) / 100 g = 12 moles H
(244.25 g . 1.67 m) / 100 g = 4 moles O
(244.25 g . 5.69 m) / 100 g = 14 moles of C
Please provide the choices here.
The similarity of the bands in the crystal of a metal to the atomic orbitals can be explained by the band theory of metals. In an atom, when the electrons get excited, the electrons jumps to a higher orbital so as to reach equilibrium. This is analogous to the electrons in the metals which also jumps to another band once excited by an external energy (e.g. electrical energy).
