A covalent bond is formed by the sharing of _______ between atoms, whereas an ionic bond is formed by the ______

Which of the following chemical formulas shows a covalent bond (a) CO2 (b) MgO (c) NaCL (d) HBr

AlexFokin [52]

The correct answer is A. CO2
hope this helps

3 0

4 years ago

Which of these is an ethical issue associated with stem cell therapy? A) Implantation of stem cells into patients is unethical.

kiruha [24]

Actually the correct answer is D) Embryos are destroyed when stem cells are obtained from them.

8 0

3 years ago

Read 2 more answers

Help asap please will give branliest

NARA [144]

Answer:

I think its ethanol based on what I've learned

4 0

3 years ago

spontaneous redox reaction happens between zinc (Zn) and magnesium (Mg) in an electrochemical cell. (6 points) i. Use the reduct

aev [14]

Answer:

For (i): Magnesium is getting oxidized and zinc is getting reduced.

For (ii): The half reactions are given below.

For (iii): Magnesium will act as anode and zinc act as cathode.

Explanation:

For (i):

$E^o_{(Mg^{2+}/Mg)}=-2.37V\\E^o_{(Zn^{2+}/Zn)}=-0.76V$

The substance having highest positive $E^o$ potential will always get reduced and will undergo reduction reaction. Here, zinc will always undergo reduction reaction will get reduced.

Magnesium will undergo oxidation reaction and will get oxidized.

For (ii):

Oxidation reaction is defined as the reaction in which an atom looses its electrons. The oxidation number of the atom gets increased during this reaction.

$X\rightarrow X^{n+}+ne^-$

Reduction reaction is defined as the reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.

$X^{n+}+ne^-\rightarrow X$

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-$

Reduction half reaction: $Zn^{2+}+2e^-\rightarrow Zn$

For (iii):

Oxidation reaction always occurs on anode side and thus, magnesium is acting as anode.

Reduction reaction always occurs on cathode side and thus, zinc is acting as cathode.

3 0

4 years ago

Solid iron combines with oxygen gas to form solid iron(III) oxide. Which of the following equations best describes this reaction

IrinaK [193]

Answer:

b. 4 fe + 3 O 2 --->

Explanation:

its simple please mark brainlnest

6 0

2 years ago

A covalent bond is formed by the sharing of _______ between atoms, whereas an ionic bond is formed by the _______.

A covalent bond is formed by the sharing of _ between atoms, whereas an ionic bond is formed by the _.