What are the reactants in a chemical formula?(1 point)

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What does the Law of Conservation of Mass say about a chemical reaction?(1 point)


To balance a chemical equation, additional mass may be created.

Mass increases as atoms are rearranged during a chemical reaction.

Mass is not measurable in a chemical reaction.

In a chemical reaction, mass is neither created nor destroyed.
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what is the answer
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Which of the following molecules shows two atoms of hydrogen (H)?(1 point)

H2SO4 cap h sub 2 cap s cap o sub 4 2H2O 2 cap h sub 2 cap o HO2 cap h cap o sub 2 2CH4 2 cap c cap h sub 4
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From the Periodic table, it can be determined that iron (Fe) has an atomic mass of 56 amu, oxygen (O) has an atomic mass of 16 amu, and hydrogen (H) has a mass of 1 amu. What would the atomic mass of Fe(OH) 3 be?(1 point)

219 amu

73 amu

75 amu

107 amu
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Which phrase describes a valence electron?(1 point)
an electron in the innermost orbit of an atom

an electron that has been removed from an atom

any negatively charged particle in an atom

an electron in the outer energy level of an atom
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Which phrase describes valence electrons?(1 point)

the electrons in an atom’s outermost energy level

the electrons surrounding an atom’s nucleus

electrons that are exchanged between atoms

electrons that are shared between atoms
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Why do atoms exchange or share electrons during bonding?(1 point)
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what is the answer??
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How many valence electrons are in an atom of the element fluorine? (1 point)

two

five

eight

seven
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The reactants in a chemical formula are the substances that undergo a chemical reaction to produce a new product(s).
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In a chemical reaction, the Law of Conservation of Mass states that mass is neither created nor destroyed. This means that the total mass of the reactants must be equal to the total mass of the products.
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The correct answer is: In a chemical reaction, mass is neither created nor destroyed.
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The molecule that shows two atoms of hydrogen is H2O.
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To determine the atomic mass of Fe(OH)3, we need to add up the atomic masses of each element in the compound.

Atomic mass of Fe: 56 amu
Atomic mass of O: 16 amu
Atomic mass of H: 1 amu

Fe(OH)3 consists of 1 Fe atom, 3 O atoms, and 3 H atoms.

Total atomic mass = (1 x 56 amu) + (3 x 16 amu) + (3 x 1 amu)

= 56 amu + 48 amu + 3 amu

= 107 amu

Therefore, the atomic mass of Fe(OH)3 is 107 amu.
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An electron in the outer energy level of an atom describes a valence electron.
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The phrase that describes valence electrons is "the electrons in an atom's outermost energy level."
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Atoms exchange or share electrons during bonding to achieve a more stable electron configuration. This is because atoms have a tendency to attain a full outer shell, typically composed of eight electrons, which is known as the octet rule. By gaining, losing, or sharing electrons, atoms can achieve a full outer shell and increase their stability.
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The answer is: Atoms exchange or share electrons during bonding to achieve a more stable electron configuration.
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An atom of the element fluorine has seven valence electrons.

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