Question

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

Answer 1

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.

Answer 2

what is the answer

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

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

Answer 7

Why do atoms exchange or share electrons during bonding?(1 point)

Answer 8

what is the answer??

Answer 9

How many valence electrons are in an atom of the element fluorine? (1 point)

two

five

eight

seven