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3 years ago

What is the full meaning of DR.HERC

Chemistry

2 answers:

slavikrds [6]3 years ago

8 0

Answer:

Define

RESEARCH

HYPOTHESIS

EXPERIMENT

RESULT

CONCLUSION

Explanation:

Sedaia [141]3 years ago

5 0

Answer:

Determine the problem

Gather Research

Form a Hypothesis

Carry out an experiment

Record and analyse the results

Summarise the outcome in a Conclusion

Explanation:

Hope this helps :D

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Answer : The volume of the cube is, $21.88cm^3$

Solution : Given,

Density of nickel = $8.91g/cm^3$

Number of nickel atoms = $2\times 10^{24}$

Molar mass of nickel = 58.7 g/mole

First we have to calculate the moles of nickel.

As, $6.022\times 10^{23}$ atoms form 1 mole of nickel

So, $2\times 10^{24}$ atoms form $\frac{2\times 10^{24}}{6.022\times 10^{23}}=3.321$ moles of nickel

The moles of nickel = 3.321 moles

Now we have to calculate the mass of nickel.

$\text{ Mass of Ni}=\text{ Moles of Ni}\times \text{ Molar mass of Ni}$

$\text{ Mass of Ni}=(3.321moles)\times (58.7g/mole)=194.94g$

The mass of nickel = 194.94 g

Now we have to calculate the volume of nickel.

$Density=\frac{Mass}{Volume}$

$8.91g/cm^3=\frac{194.94g}{Volume}$

$Volume=21.88cm^3$

Therefore, the volume of the cube is, $21.88cm^3$

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3 years ago

Balance the equation for ethane C3H6 burning in oxygen to form carbon dioxide and steam. _____C3H6 + ____ O2 ---> CO2 + ____H

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Answer:

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Explanation:

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How can these objects all weigh the same but be different sizes?

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Density/Earth’s gravitational pull.

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2 years ago

Compare the type of change that occurs when an iron bar rusts and when a substance freezes.

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Explanation:

when an iron bar rust is an example of a chemical change in which a new substance is formed and the change is not easily reversible.for iron to rust moisture and air must be present.while when a substance freezes,it can be easily reversed through melting and no new substance is formed.this change is termed a physical change.

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2 years ago

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More the number of turns, more will be the magnetic field produced.

Hence wire A will have magnetic field greater than wire B.

Hope this helps!

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3 years ago

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What is the full meaning of DR.HERC​

What is the full meaning of DR.HERC