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cluponka [151]
4 years ago
9

If the specific heat capacity of water is 4.19 J/(g⋅K), how much energy would be required to raise the temperature of 100.0 g of

water by 2.00 °C?
Chemistry
1 answer:
Novosadov [1.4K]4 years ago
3 0
<h3>Answer:</h3>

838 Joules

<h3>Explanation:</h3>
  • To calculate amount of heat required we multiply mass of water by the specific heat capacity and then by change in temperature.
  • That is; Q =m×c×ΔT

We are given;

Specific heat capacity of water, c = 4.19 J/g.K

Mass of water, m = 100.0 g

Change in temperature, ΔT = 2.00°C or 2 K

Therefore;

Q = mcΔT

  = 100 g ×  4.19 J/g.K × 2K

  = 838 Joules

Thus, the energy required is 838 Joules

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Find the percentage composition of a compound that contains 17.6 g of iron and
olganol [36]

Answer:

Explanation:

Your goal here is to figure out the mass of iron and the mass of sulfur present in exactly

100 g

of this compound, which is what you need in order to know the compound's percent composition.

The problem provides you with the mass of iron and with the mass of sulfur present in

27.9 g

of this compound, so you must use this information to scale up your sample from

27.9 g

to

100 g

.

To do that, set up the known composition of the compound as a conversion factor.

To find the number of grams of iron present in

100 g

of compound, set up the conversion factor like this

17.6 g iron

27.9 g compound

You will end up with

100

g compound

⋅

17.6 giron

27.9

g compound

=

63.1 g iron

To find the mass of sulfur present in

100 g

of compound, you can either use a conversion factor set up in a similar manner

100

g compound

⋅

10.3 g sulfur

27.9

g compound

=

36.9 g sulfur

or use the fact that the compound contains only iron and sulfur to say that the mass of sulfur will be equal to

100 g compound

−

63.1 g iron = 36.9 g sulfur

You now know the mass of iron and the mass of sulfur present for every

100 g

of compound, so you can say that the compound has the following percent composition

63.1% iron

36.9% sulfur

Here

%

means per

100 g

of compound.

5 0
3 years ago
Two different atoms have four protons each and the same mass. However, one has a positive charge while the other is neutral. Des
seraphim [82]

The possible number and location of all subatomic are one of them is electrically neutral, while the other has a stable electronic configuration.

<h3>What are subatomic particles?</h3>

Subatomic particles are those particles that are present inside the atoms. They are electron, neutron, and proton. They are charged particles, protons are positively charged, electrons are negatively charged and neutrons are neutral.

The protons and electrons totally contribute to the atomic mass of the elements.

Thus, the subatomic particles are electrically neutral and stable to electronic configurations.

To learn more about subatomic particles, refer to the below link:

brainly.com/question/13303285

#SPJ1

8 0
2 years ago
Which of the following describes the stage that occurs after evaporation in the water cycle?
saw5 [17]
C. Condensation is the right answer
4 0
3 years ago
Is a Frisbee flying through the air mechanical energy
victus00 [196]
Yes because mechanical energy is the motion of an object. hope that helped!
4 0
3 years ago
Calculate the energy of light having a wavelength of 395 nm. <br> show work
Liono4ka [1.6K]

Answer: 5.032\times 10^{-19}\ J

Explanation:

Given

The wavelength of the light is \lambda =395\ nm

Energy associated with a photon(light) is given by E=\frac{hc}{\lambda}

where, h=\text{Planck constant}

c=\text{speed of light}

\Rightarrow E=\dfrac{6.626\times 10^{-34}\times 3\times 10^8}{395\times 10^{-9}}\\\\\Rightarrow E=5.032\times 10^{-19}\ J

Therefore, the energy associated with the light is 5.032\times 10^{-19}\ J

6 0
3 years ago
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