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Musya8 [376]
3 years ago
13

ASAP!!!!!!!!!!!!

Chemistry
1 answer:
dlinn [17]3 years ago
6 0
<span>a. Tall prarie grass burns after being struck by lightning.</span>
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6. Plants play a vital role in the environment because photosynthesis
Vanyuwa [196]

Answer:

C

Explanation:

Plants help in carbon dioxode reduction so plants uses atmospheric carbon dioxide and water to produce sugars and oxygen.

HOPE ITS HOPEFUL.

6 0
3 years ago
Read 2 more answers
A 35.66g sample of copper is heated using 600j of energy. if the original temperature of the copper is 85C what is its final tem
ira [324]

This problem is providing the mass, energy, initial temperature and specific heat of a sample of copper that is required to calculate the final temperature.

Thus, we recall the general heat equation:

Q=mC(T_f-T_i)\\

Which has to be solved for the final temperature, T_f as follows:

T_f=T_i+\frac{Q}{mC}

Finally, we plug in the numbers to obtain:

T_f=85\°C+\frac{600J}{35.66g*0.38\frac{J}{g\°C} } \\\\T_f=129.3\°C

However, this result is not given in the choices.

Learn more:

  • brainly.com/question/14383794
8 0
2 years ago
What is the theoretical yield of methanol (CH3OH) when 12.0 grams of H2 is mixed with 74.5 grams of CO? CO + 2H2 CH3OH
AlladinOne [14]
1) We need to convert 12.0 g of H2 into moles of H2, and <span> 74.5 grams of CO into moles of CO
</span><span>Molar mass of H2:    M(H2) = 2*1.0= 2.0 g/mol
Molar mass of CO:   M(CO) = 12.0 +16.0 = 28.0 g/mol

</span>12.0 g  H2 * 1 mol/2.0 g = 6.0 mol H2
74.5 g CO * 1 mol/28.0 g = 2.66 mol CO

<span>2) Now we can use reaction to find out what substance will react completely, and what will be leftover. 

                                  CO       +         2H2   ------->      CH3OH  
                                 1 mol              2 mol
given                        2.66 mol          6 mol (excess)

How much
we need  CO?           3 mol              6 mol

We see that H2 will be leftover, because for 6 moles H2  we need 3 moles CO, but we have only 2.66 mol  CO.
So, CO will react completely, and we are going to use CO to find  the mass of CH3OH.

3)                              </span>CO       +         2H2   ------->      CH3OH  
                                 1 mol                                        1 mol
                                2.66 mol                                    2.66 mol

4) We have 2.66 mol CH3OH
Molar mass CH3OH : M(CH3OH) = 12.0 +  4*1.0 + 16.0 = 32.0 g/mol

2.66 mol CH3OH * 32.0 g CH3OH/ 1 mol CH3OH =  85.12 g CH3OH
<span>
Answer is </span>D) 85.12 grams.
3 0
3 years ago
What is Ivan Pavlov most known for?
denis-greek [22]

Ivan Pavlov is most known for demonstrating conditioned lreflex in dogs.

<h3>what is conditioned reflex?</h3>

Conditioned reflex is a reflex action which has been conditioned to occur even without the stimulus which produces the reflex.

Ivan Pavlov is known to demonstrate conditioned reflex in dogs.

In his experiment, he trained dogs to salivate at the sound of a bell even if food which is the stimulus that produces salvation was not present.

Learn more about conditioned reflex at: brainly.com/question/24968947

5 0
2 years ago
Read 2 more answers
An inclined plane is a machine why?​
attashe74 [19]

Answer:

An inclined plane is a machine because it makes horizontal surface that make easier for us to move objects to higher or lower surfaces.

3 0
2 years ago
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