Question

1. What determines whether one metal will replace another metal from a compound in a single-replacement reaction?

2.Distinguish between ionic and covalent bonds in terms of how each is formed.


3.Perform the following operation. Express your answers in the correct number of significant figures.

36.47cm + 2.721 cm + 15.1 cm

Answer 1

In a single-replacement reaction, the activity series determines whether one metal will replace another metal from a compound. Ionic bonds are formed between a metal and a nonmetal through the transfer of electrons, while covalent bonds are formed between two nonmetals through the sharing of electrons. The given operation, 36.47 cm + 2.721 cm + 15.1 cm, results in 54.3 cm with 3 significant figures.

Step-by-step explanation:

In a single-replacement reaction, whether one metal will replace another metal from a compound depends on the activity series. The activity series is a list of metals in order of their reactivity, with the most reactive at the top. A metal higher in the activity series will replace a metal lower in the activity series from a compound. For example, zinc (Zn) can replace copper (Cu) from copper sulfate (CuSO4), but copper cannot replace zinc.

When comparing ionic and covalent bonds, ionic bonds are formed between a metal and a nonmetal through the transfer of electrons. The metal loses electrons to become a cation, while the nonmetal gains electrons to become an anion.

Covalent bonds, on the other hand, are formed between two nonmetals through the sharing of electrons. The nonmetals share electrons to achieve a stable electron configuration. For example, sodium chloride (NaCl) is an ionic compound, while methane (CH4) is a covalent compound.

To perform the given operation with the correct number of significant figures, we add the given values: 36.47 cm + 2.721 cm + 15.1 cm = 54.291 cm. Since the smallest number of significant figures is 3 (from 2.721 cm), we round the final answer to 3 significant figures, giving us 54.3 cm.

Answer 2

The correct answer to the following questions are these:

1. Displacement occurs when they is an obvious difference in reactivity for both your metals. If you got Rubidium and Sodium, obviously rubidium got the better reactivity, hence it will displace any sodium compound in any reaction unless u got something more reactive than rubidium.

2. A molecule or compound is made when two or more atoms form a chemical bond, linking them together. The two types of bonds are ionic bonds and covalent bonds. In an ionic bond, the atoms are bound together by the attraction between oppositely-charged ions. For example, sodium and chloride form an ionic bond, to make NaCl, or table salt. In a covalent bond, the atoms are bound by shared electrons. If the electron is shared equally between the atoms forming a covalent bond, then the bond is said to be nonpolar. Usually, an electron is more attracted to one atom than to another, forming a polar covalent bond. For example, the atoms in water, H2O, are held together by polar covalent bonds.

3. 54.291