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zhenek [66]
3 years ago
8

In any chemical compound, the elements are always combined in the same proportion by ___. A. charge B. mass C. volume D. density

Chemistry
1 answer:
Tresset [83]3 years ago
6 0

Answer is: B. mass.

Proust's law or law of constant composition said that a given chemical compound always contains its component elements in fixed ratio and does not depend on method of preparation.

Law of multiple proportions or Dalton's Law said that the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small whole numbers.  

For example, nitrogen(I) oxide N₂O; m(N) : m(O) = 2·14 : 16 = 7 : 4.

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Tamara is doing a scientific investigation to answer the question, "Do corn seeds germinate faster at warmer temperatures than t
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Answer:

The tools/instruments, the type of seed, the soil or planting products, the amount of germination time/days, and where the seedling is placed.

Explanation:

If anything but the temperature is changed, it can result in false results. For instance, if Tamera uses red corn for one but yellow corn for the other, it can change the germination rate. So can the type of soil, water or the amount of time each plant has to grow. If she changes thermometers or any other tool she uses, it may give her a different result than the ones she used before. And finally, if she moves the warm plant from the windowsill to her bedroom, it can mess with the results she gets from the heated sample.

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3 years ago
What is one way humans can preserve biodiversity
goldenfox [79]

Answer:

Reducing the amount of water you use, by having a 5-minute shower or not running the water when washing up the dishes, can help protect vital wetlands. Plant scientists are also working to help conserve by developing crop varieties that use less water.

Explanation:

5 0
3 years ago
Balance the equation <br> C2H6O+O2 ——&gt; CO2 + H2O
Anvisha [2.4K]
C2H6O + 3O2 —> 2CO2 + 3H2O
6 0
3 years ago
[2]
vitfil [10]

Explanation:

The temperature of the molten iron remained constant at 2750°C because of the heat absorbed to effect the phase change and not to change the temperature.

The heat of vaporization is a latent or hidden heat absorbed by substances that causes a phase change from liquid to gas.

  • In essence, the heat is used to break intermolecular bonds between the particles of the melted vat.
  • If enough heat is no supplied the molten vat will not boil off and become vapor.
  • In transitioning from liquid to gas, heat is absorbed by a body to effect the phase change.
  • When the body acquires enough heat, the particles are able to break off and boil.
  • At the 2750°C  mark, this is what is happening.

learn more:

Specific heat brainly.com/question/7210400

#learnwithBrainly

6 0
3 years ago
Please help me with this quick!!
Katen [24]

Answer:

Carbon : chemical symbol is "C"

Chlorine: chemical symbol is"Cl"

7 0
3 years ago
Read 2 more answers
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