Answer:
C. substances that are used up in a reaction
Explanation:
Substances are combined in a chemical reaction to give rise to other substances. The substances that come together are called REACTANTS while the substances that are produced are called PRODUCTS.
Reactants are used up in the reaction to give rise to new products at the end of the reaction. For example, in the reaction as follows:
6CO2 + 6H2O --> C6H12O6 + 6O2
CO2 (carbon dioxide) and water (H2O) are the REACTANTS of the reaction, which are used up to form glucose and oxygen (products)
Answer is: elements in the same group have similar chemical properties.
Periodic law<span> is the arrangement of the </span>elements<span> in order of increasing atomic number.
</span>For example all alkaline metals (I group of periodic table, Na, K, Cs...) loose one electron in chemical reaction and react vigorously with water.
Answer:
15.17 g
Explanation:
To answer this, we need to find the molar mass of nickel in nickel (II) fluoride. The formula for nickel (II) fluoride is NiF2. This gives us the molar mass of 96.69 g. The mass percentage of nickel is 60.70% approximately (as we divide the molar mass of nickel by that of nickel (II) fluoride), and 60% of 25g gives us 15.17 g
Explanation:
The problem is in balancing the reaction equation;
Li + AlCl₃ → LiCl + Al
In balancing chemical equations, we must keep the law of conservation of matter in mind.
The law shows that the number of atoms on both sides of the reaction must be the same.
To balance the given equation, we set up simple, solvable algebraic mathematical expressions:
aLi + bAlCl₃ → cLiCl + dAl
Coefficients a, b,c and d
Conserving:
Li: a = c
Al: b = d
Cl: 3b = c
let b = 1;
d = 1
c = 3
a = 3
3Li + AlCl₃ → 3LiCl + Al
learn more:
Balanced chemical equation brainly.com/question/2947744
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