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RideAnS [48]
4 years ago
6

A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast were they running ?

Chemistry
1 answer:
madam [21]4 years ago
3 0
Hi Alex, thanks for asking a question here on Brainly!

We can figure how the fast the person is running by dividing the minutes by the seconds. 

\frac{5m}{sec}
= \frac{300m}{min}
= \frac{18km}{hr}

The person was running 18 km/hr. ✅ 

Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or post another question and send the link to me. -UnicornFudge aka Nadia.
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Ulfur dioxide gas can react in the presence of oxygen and vanadium(V) oxide to form sulfur trioxide. Sulfur trioxide is the only
LenaWriter [7]

According to the illustration, the vanadium (V) oxide would be a catalyst.

<h3>What are catalysts?</h3>

Catalysts are substances that are utilized in reactions that are not themselves consumed in reactions but only speed up the rate of the reactions.

Catalysts speed up the rate of reactions by lowering the activation energy of the reactants.

Sulfur dioxide reacts with oxygen to produce sulfur trioxide. The vanadium (v) oxide is not consumed in the reaction. Thus it only serves as a catalyst.

More on catalysts can be found here: brainly.com/question/12260131

#SPJ1

4 0
3 years ago
6.0 mol Al reacts with 4.0 mol O2 to form Al2O3.
Tema [17]

Answer:

3.0 moles Al₂O₃

Explanation:

We do not know which of the reactants is the limiting reactant. Therefore, you need to convert both of the given mole values into the product. This can be done using the mole-to-mole ratio made up of the balanced equation coefficients.

4 Al + 3 O₂ -----> 2 Al₂O₃

6.0 moles Al            2 moles Al₂O₃
----------------------  x  -------------------------  =  3.0 moles Al₂O₃
                                    4 moles Al

4.0 moles O₂           2 moles Al₂O₃
----------------------  x  -------------------------  =  2.7 moles Al₂O₃
                                    3 moles O₂

As you can see, O₂ produces the smaller amount of product. This means O₂ is the limiting reactant. Remember, the limiting reactant is the reactant which runs out before the other reactant(s) are completely reacted. As such, the actual amount of Al₂O₃ produced is 2.7 moles.

However, since this problem is directly addressing how much Al₂O₃ is produced from Al, the answer you most likely are looking for is 3.0 moles Al₂O₃.

6 0
2 years ago
C3h8 + 5 o2 --&gt; 3 co2 + 4 h2o this is an example of a _______________.
drek231 [11]
<span><u><em>Answer:</em></u>
combustion reaction

<u><em>Explanation:</em></u>
In chemistry, a <u>combustion reaction</u> is defined as a reaction between an oxidant and any compound that leads to the production of another compound along with a huge amount of heat.

<u>Now, let's check the reaction given:</u>
C</span>₃H₈<span> + 5 O</span>₂<span> --> 3 CO</span>₂<span> + 4 H</span>₂O<span>
<u>The oxidant</u> is oxygen gas
<u>The compound reacting</u> is propane
<u>The compound produced</u> is carbon dioxide along with water vapor and heat

Therefore, the given reaction is a combustion reaction

Hope this helps :)</span>
5 0
3 years ago
Read 2 more answers
Identify all actions that you should take if you have chipped or broken glassware. Notify your teacher. Have the custodian clean
12345 [234]

Explanation:

If you have chipped or broken glassware then it is very important that you should take precaution yourself by conveying about it to your teacher and class mates.

By doing so you are making everybody aware to be cautious of the chipped or broken glassware.

Also, it is advised that you should dispose of it in the designated glass waste area.

Therefore, we can conclude that all actions that you should take if you have chipped or broken glassware as as follows.

  • Notify your teacher.
  • Notify classmates.
  • Dispose of it in the designated glass waste area.
8 0
3 years ago
Read 2 more answers
Which of the following is the correct notation for an isotope with 3 protons and 5 neutrons
Ne4ueva [31]

Answer:

Hello is there a specific aliment you have in mind If so I can explain and tell you the answer.

5 0
4 years ago
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