Which statement comparing ionic and covalent bonds is correct?

Question

a
More electrons are transferred from covalent bonds than ionic bonds.
b
Elements in Group 1A are more likely to form covalent bonds than ionic bonds with other atoms.
c
The difference between electronegativities is greater in covalent bonds than for atoms in ionic bonds.
d
Covalent bonds tend to be less polar than ionic bonds.

Answer 1

The correct statement comparing ionic and covalent bonds is:

d. Covalent bonds tend to be less polar than ionic bonds.

Here's a quick explanation of why the other statements are not correct:

a. More electrons are transferred from covalent bonds than ionic bonds.

• This is incorrect because in ionic bonds, electrons are transferred from one atom to another, while in covalent bonds, electrons are shared between atoms.

b. Elements in Group 1A are more likely to form covalent bonds than ionic bonds with other atoms.

• This is incorrect because Group 1A elements typically lose one electron to form cations and primarily form ionic bonds with nonmetals.

c. The difference between electronegativities is greater in covalent bonds than for atoms in ionic bonds.

• This is also incorrect. Ionic bonds usually occur between atoms with a large difference in electronegativity (greater than 1.7), whereas covalent bonds generally occur between atoms with similar electronegativities.

Answer 2

In the balanced chemical equation, below, determine what the coefficient and the subscript represent in 6H2O.

Choose ALL the answers that are correct.



a
The 6 coefficient represents 6 molecules of water.
b
The 2 subscript represents 2 water molecules.
c
The 2 subscript represents 2 atoms in each water molecule.
d
The 6 coefficient represents 6 atoms in each water molecule.

Answer 3

To analyze the expression 6H₂O, let's look at the coefficient (6) and the subscript (2):

• 6 is the coefficient: It indicates the number of water molecules.
• 2 is the subscript: It indicates that each water molecule (H₂O) contains 2 hydrogen atoms and 1 oxygen atom.

Now, let's evaluate the provided answers:

a. The 6 coefficient represents 6 molecules of water.

• Correct. The coefficient 6 indicates that there are 6 molecules of water.

b. The 2 subscript represents 2 water molecules.

• Incorrect. The subscript 2 indicates that there are 2 hydrogen atoms in each water molecule, not 2 water molecules.

c. The 2 subscript represents 2 atoms in each water molecule.

• Correct. The subscript 2 indicates that there are 2 hydrogen atoms in each H₂O molecule.

d. The 6 coefficient represents 6 atoms in each water molecule.

• Incorrect. The coefficient 6 represents the total number of water molecules, not the number of atoms in each molecule.

Thus, the correct answers are a and c.

Answer 4

Please review this model chemical reaction: A + 2B ---> C + 4D

Which of the above represents the reactants? Select ALL correct responses, below.

a
C
b
C + 4D
c
A
d
2B

Answer 5

In a chemical reaction, the reactants are the substances that undergo a chemical change to form products. In the provided reaction:

A + 2B → C + 4D,

the reactants are the substances to the left of the arrow.

Now, let's analyze the options provided:

a. C

• Incorrect. C is a product, not a reactant.

b. C + 4D

• Incorrect. Both C and 4D are products (the substances formed after the reaction), not reactants.

c. A

• Correct. A is one of the reactants in the equation.

d. 2B

• Correct. 2B is also a reactant in the equation.

Therefore, the correct responses that represent the reactants are c and d.

Answer 6

A bath bomb is a solid sphere made of a weak base and a weak acid. When it you add it to a bathtub, it mixes with the water to create a soapy solution. If you want it to completely and quickly dissolve a large bath bomb, what might you do?

a
Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.
b
Decrease the water volume, which increases the solubility of the bath bomb - dissolving it more quickly.
c
Decrease the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.
d
Increase the water acidity to a pH of 2, which increases neutralization of the bath bomb - and then take a shower, instead

Answer 7

To dissolve a large bath bomb completely and quickly in water, let’s evaluate each of the options:

a. Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.

• Correct. Increasing the temperature generally increases the solubility of solids in liquids and can enhance the rate of dissolution, thus helping to dissolve the bath bomb more quickly.

b. Decrease the water volume, which increases the solubility of the bath bomb - dissolving it more quickly.

• Incorrect. Decreasing the water volume means there is less solvent available to dissolve the solute. This would not help in dissolving the bath bomb more quickly.

c. Decrease the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.

• Incorrect. Decreasing the water temperature generally lowers the solubility of solids, making it less effective for dissolving the bath bomb quickly.

d. Increase the water acidity to a pH of 2, which increases neutralization of the bath bomb - and then take a shower, instead.

• Incorrect. While increasing acidity might affect the dissolution of certain components in the bath bomb, lowering the pH to such a level (pH of 2) may not be practical or safe for bathing. Neutralization typically doesn't enhance the dissolution process for a bath bomb.

Considering these evaluations, the best choice for dissolving a large bath bomb completely and quickly is a: Increase the water temperature, which increases the solubility of the bath bomb - dissolving it more quickly.

Answer 8

Balance the following the chemical equation:

_ Mg + _ F2 → _ MgF2

a
1:1:2
b
1:2:1
c
1:1:1
d
2:1:1

Answer 9

To balance the chemical equation:

\[_ \text{Mg} + _ \text{F}_2 \rightarrow _ \text{MgF}_2\]

let's start by identifying the number of atoms of each element on both sides of the equation:

• Reactants (left side):

  • Magnesium (Mg): 1 (from _Mg)
  • Fluorine (F): 2 (from _F₂)

• Products (right side):

  • Magnesium (Mg): 1 (from _MgF₂)
  • Fluorine (F): 2 (since there are 2 fluorine atoms in MgF₂)

Now, to balance the equation:

1. We have 1 Mg on the left and 1 Mg on the right, so Mg is balanced.
2. We have 2 F on the left and 2 F on the right (as MgF₂ contains 2 F).

Since both magnesium and fluorine are balanced with the coefficients of 1 for Mg, 1 for F₂, and 1 for MgF₂ in the final equation, the balanced equation is:

\[1 \text{ Mg} + 1 \text{ F}_2 \rightarrow 1 \text{ MgF}_2\]

Thus, the coefficients are 1:1:1.

The correct answer is c: 1:1:1.

Answer 10

One molecule of Iodine (I2) and two molecules of sodium chloride (NaCl) combine in a reaction. How many atoms are in the products?

a
6
b
3
c
4
d
2

Answer 11

To determine how many atoms are in the products when one molecule of iodine (\(I_2\)) reacts with two molecules of sodium chloride (\(NaCl\)), let's first analyze the reactants:

1. Iodine (\(I_2\)):

   • There are 2 iodine atoms in one molecule of \(I_2\).

2. Sodium Chloride (\(NaCl\)):

   • Each molecule of \(NaCl\) contains 1 sodium atom and 1 chlorine atom.
   • Since there are 2 molecules of \(NaCl\), the total number of atoms from sodium chloride is:
     • Sodium: \(2 \text{ molecules} \times 1 \text{ Na} = 2 \text{ Na atoms}\)
     • Chlorine: \(2 \text{ molecules} \times 1 \text{ Cl} = 2 \text{ Cl atoms}\)

Now, let's combine the atoms from both reactants:

• From \(I_2\): 2 iodine atoms
• From \(2 NaCl\):
  • 2 sodium atoms
  • 2 chlorine atoms

Now, we calculate the total number of atoms in the products:

• Total from \(I_2\): 2 (from iodine)
• Total from \(2 NaCl\): \(2 \text{ (Na)} + 2 \text{ (Cl)} = 4\)

Adding these together gives:

\[ 2 \text{ (I)} + 2 \text{ (Na)} + 2 \text{ (Cl)} = 6 \text{ total atoms} \]

Therefore, the total number of atoms in the products is 6.

The correct answer is a: 6.