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xxTIMURxx [149]
3 years ago
15

How much energy is required to raise the temperature of 3 kg of iron from 20°

Chemistry
1 answer:
stepladder [879]3 years ago
6 0

Answer:

good morning everyone I am going to read I am going to read the chapter of nature and who make the stories in Telugu in the latter part of the 9th centuryonce upon a time not stop the story I am going to ask you some few questions and now upon a time upon a time there lived a poor and stitching nice butter is found a strong that shut and when he tried so I

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A 996.9 g sample of ethanol undergoes a temperature change of -70.98 °C while releasing 62.9
Volgvan

Answer:

c=3.71\ J/g^{\circ} C

Explanation:

Given that,

Mass of sample, m = 996.9 g

The change in temperature of the sample, \Delta T=-70.98^{\circ}C

Heat produced, Q = 62.9  calories = 263173.6 J

The heat released by a sample due to change in temperature is given by :

Q=mc\Delta T

Where

c is the specific heat capacity

So,

c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{263173.6}{996.9\times 70.98}\\\\c=3.71\ J/g^{\circ} C

So, the specific heat of ethanol is equal to 3.71\ J/g^{\circ} C.

3 0
3 years ago
A bottle of acetone (fingernail polish remover) contains 55.0 mL of acetone. If the acetone has a mass of 43.5 g, what is the de
mihalych1998 [28]
If you were to use the formula to find density which is D=M/V and plug in your numbers M which stands for mass and and plug in your numbers for V which what’s for Volume and should be a number in mL and then divide them you should get your answer. So 43.5g divided by 55.0mL and your density would = 0.79g/mL
5 0
3 years ago
What element is steel mainly composed of?
Liula [17]
Steel is an alloy that is mainly comprised of CARBON. Hope this helps and give thanks plsss!
3 0
3 years ago
Read 2 more answers
A 260.0 −mL buffer solution initially contains 2.5×10−2 M of HCHO2 and 2.5×10−2 M of NaCHO2
FinnZ [79.3K]

The mass of HCHO2 and NaCHO2 to be added to the buffer solution are 0.23g and 0.44g respectively

Data;

  • Volume of solution = 260mL
  • conc. of HCHO2 = 2.5*10^-2M
  • conc. of NaCHO2 = 2.5*10^-2M

<h3>Mass of Reagent Added</h3>

To calculate the mass of reagent added,  let's start with HCHO2

The mass of HCHO2 to be added is the number of moles of HCHO2 multiplied by it's molar mass.

260*10^-^3 * 2.5*10^-^2 * 46 = 0.229 = 0.23g

The mass of NaCHO2 to be added in the buffer solution is

260*10^-^3*2.5*10^-^2*68 = 0.442 = 0.44g

The mass of HCHO2 and NaCHO2 to be added to the buffer solution are 0.23g and 0.44g respectively

Learn more about buffer solution here;

brainly.com/question/22390063

3 0
2 years ago
!!Help!!Polysaccharides are healthier for the body than mono- or disaccharides are. What choices could you make to increase your
const2013 [10]

Answer:

We have to consume starch and cellulose in large amount in order to increase the consumption of polysaccharides which make our body healthier.

Explanation:

Starch is polysaccharide which is made up of many glucose molecules. it is mostly made in the body of plants and when we eat that plant this starch is transferred to our body and our body use it when it is needed while cellulose also made of hundred of glucose molecules but our body is unable to digest it because our body is unable to break the bonds between the monosaccharide of cellulose. It is good for humans due to the presence of high amount of fibers.

3 0
4 years ago
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