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saw5 [17]
2 years ago
8

The heat exchange in chemical reactions is due to change in what

Chemistry
1 answer:
azamat2 years ago
7 0
The heat exchange is due to the excess energy released in the chemical reaction.
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What are the products of photosynthesis? A: C6H12O6 + 6H2O + 6O2 B: C6H12O6 + 3O2 + 6H2O C: C6H12O6 + 3O2 + 3H2O D: C3H6O3 + 6O2
erik [133]
A: C₆H₁₂O₆ + 6H₂O + 6O₂

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8 0
3 years ago
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Becky leaves home and rides a distance of 30 km. it took her 2.5 hours. what is her speed
Charra [1.4K]
Becky's speed is her distance travelled which is 30 km divided by her time travelled of 2.5 hours which gives her average speed of 12 km/hour which is a quite good speed if she was say riding a bicycle and which would give her a good aerobic workout. 
4 0
3 years ago
Extra Stoichiometry Practice
Irina-Kira [14]

Answer: 50. 4g

Explanation:

First calculate number of moles of aluminium in 38.8g

Moles = 38.8g/ 26.982mol/g

= 1.44mol

By looking at the balance equation you can see that 4 moles of aluminium produce 2 moles of aluminium oxide.

4 = 2

1.4 = x

Find the value of x

x= (1.4×2)/4= 0.72 mol

0.72 moles of aluminium oxide are produced from 38.8g of aluminium

Now find the mass of aluminium produced.

Mass = moles × molar mass

= 0.72mol × 69.93 mol/g

= 50.4g

8 0
2 years ago
The emission spectrum of hydrogen consists of several lines. Which line has the highest frequency?
solong [7]

Answer:

  410 nm

Explanation:

The highest frequency is associated with the shortest wavelength. Of those listed, 410 nm is the shortest.

8 0
3 years ago
Use the model provided to select ALL of the examples of mixtures.
ruslelena [56]
Where is the model? I do know salt water is a mixture though
3 0
2 years ago
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