1.) <span>2Na(aq)+2H2O(l)→2NaOH(aq)+H2(g),
Na is oxidizing agent and H is reducing agent.
2.) </span><span>C(s)+O2(g)→CO2(g)
C is an oxidizing agent
3.) </span><span>2MnO−4(aq)+5SO2(g)+2H2O(l)→2Mn2+(aq)+5SO2−4(aq)+4H+(aq)
Mn is reducing agent and S is oxidizing agent.</span>
Answer:
b. Cardiac muscles.
Explanation:
These muscles are very thick in order to pump oxygenated blood to all body parts.

Answer:
See explanation
Explanation:
In this question, we have to remember that in all combustion reactions we will have <u>Oxygen</u> as reactive (
) and the products are <u>Carbon dioxide</u> (
) and <u>Water</u> (
). Additionally, for the states, we will have (l) for the <u>liquid state</u> and (g) for the <u>gas state</u>. So, we can analyze each reaction:
<u>Part A.</u>
The formula for nonane is
, with this in mind we can write the combustion reaction:

When we balance the reaction we will obtain:

<u>Part B.</u>
The formula for 2-methylbutane is
, with this in mind we can write the combustion reaction:

When we balance the reaction we will obtain:

<u>Part C.</u>
The formula for 3-ethyltoluene is
, with this in mind we can write the combustion reaction:

When we balance the reaction we will obtain:

See figure 1 for further explanations.
I hope it helps!
Answer:
If it's multiple choice it's 2 and 3, if not I think the best answer is 2, but I'm not exactly sure.