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Ainat [17]
3 years ago
10

What is the coefficient in a chemical equation

Chemistry
2 answers:
ira [324]3 years ago
8 0
<span>A numerical or constant quantity placed before and multiplying the variable in an algebraic expression.</span>
Daniel [21]3 years ago
8 0
Coefficients are the numbers placed before the reactants in a chemical equation so that the number of atoms in the products on the right side of the equation are equal to the number of atoms in the reactants on the left side.
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MgO + H2O = Mg(OH)2 is an example of a _____ chemical reaction.
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a) synthesis- or combination- reaction

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Describe how visible spectroscopy could be used to determine the order of a reaction in which a single colorless reactant produc
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Explanation:

In a reaction, where, one of the reactant produces a colored product, visible spectroscopy can be used to determined the order of a reaction, the change in concentration of the reactant which forms the colored product is determined by absorbance measurement over time. The data for the concentration and time are plotted on the y and x axis and If we get a straight line it is a zero-order reaction. If instead, a plot of ln[concentration] versus time gives a straight line, it is a first order reaction. However, If 1/concentration versus time gives a straight line, it is a second order reaction kinetics. The other reactants may be changed while keeping this reactant as constant and change on rate of the reaction is observed to see If the other reactant affects the reaction or not.

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3 years ago
Carbon dioxide, water vapor, and oxygen pass through ---------------
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The answer is B) stomata.
5 0
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Sergeu [11.5K]

Answer:

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All of above except carbon dioxide

7 0
3 years ago
What happens when magnesium reacts with iodine to make magnesium iodide?
I am Lyosha [343]

Explanation:

Atomic number of magnesium is 12 and its electronic distribution is 2, 8, 2. On the other hand, atomic number of iodine is 53 and its electronic configuration is [Kr]4d^{10}5s^{2}5p^{5}.

Hence, there are 7 valence electrons in an iodine atom and there are 2 valence electrons in a magnesium atom.

So, one atom of iodine requires one electron from a donor atom to complete its octet. But one magnesium atom contains two valence electrons.

Therefore, one magnesium atom will combine with two iodine atoms to result in the formation of magnesium iodide as follows.  

            Mg^{2+} + 2I^{-} \rightarrow MgI_{2}

Therefore, an ionic bond will be formed when  magnesium reacts with iodine to make magnesium iodide.

7 0
3 years ago
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