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lions [1.4K]
2 years ago
12

The arrows in the chart below represent phase transitions. Three bars are shown labeled Solid, Liquid, and Gas. They are connect

ed by arrows labeled 1 to 6. Arrow 1 points from liquid to gas; arrow 2 from solid to liquid, arrow 3 from solid to gas, arrow 4 from gas to liquid, arrow 5 from liquid to solid, and arrow 6 from gas to solid. Which arrows represent the phase transitions in which heat energy is gained? 1, 2, and 3 2, 3, and 5 3, 4, and 5 4, 5, and 6 Mark this and return
Chemistry
1 answer:
Setler [38]2 years ago
7 0

The arrows that represent the phase transitions in which heat energy is gained is : (A). 1, 2 and 3

<h3>Meaning of phase transitions</h3>

Phase transitions can be defined as the changing of matter from one form to another due to the addition or gaining of heat or due to the removal or loss of heat.

Phase transitions in matter are majorly between three phases which are: Solid, Liquid and Gas.

In conclusion, The arrows that represent the phase transitions in which heat energy is gained is : (A). 1, 2 and 3

Learn more about Phase transitions: brainly.com/question/11048831

#SPJ1

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An unknown compound contains only carbon, hydrogen, and oxygen. Combustion analysis of the compound gives the mass percent of 31
Veseljchak [2.6K]

Answer:

C4H8O6 is the molecular formula

The molar mass is 152 g/mol

Explanation:

Step 1: Data given

Mass % C = 31.57%

Mass % H = 5.30 %

Mass % O = 100 - 31.57 - 5.30 = 63.13 %

The freezing point = –5.30°C

Mass of the compound = 10.8 grams

Mass of water = 25.0 grams

compound is a nonelectrolyte.

Step 2: Calculate moles of elements

moles C = 31.57 grams/ 12.01 g/mol = 2.629 moles

moles H = 5.30 grams/ 1.01 g/mol = 5.25 moles

moles O = 63.13 grams / 16.0 g/mol = 3.95  moles

Step 3: Calculate the mol ratio

We divide by the smallest number

C: 2.629 moles / 2.629 moles = 1

H: 5.25 moles / 2.629 moles = 2

O: 3.95 moles / 2.629 moles = 1.5

The empirical formula is C2H4O3

The molecular mass of this is 76.06 g/mol

Step 4: Calculate moles solute

5.30 = m * 1.86

m = 2.85 = moles solute / 0.025 Kg

moles solute = 2.85 * 0.025 = 0.07125 moles

Step 5: Calculate molar mass

molar mass = 10.8 grams / 0.07125 moles = 152 g/mol

Step 6: Calculate molecular formula

152/76.06 ≈ 2

We have to multiply thr empirical formula by 2

2*(C2H4O3) = C4H8O6

C4H8O6 is the molecular formula

8 0
2 years ago
Which is the electron configuration for zinc?
FinnZ [79.3K]

Answer:

1s2 2s2 2p6 3s2 3p6 4s2 3d10

3 0
1 year ago
4HCl(g)+O 2 (g) 2H 2 O(g)+2Cl 2 (g) Each of the following molecular diagrams represents an initial mixture of the reactants. How
irga5000 [103]
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4 0
2 years ago
What the recipe of momo​
viktelen [127]

Answer:

Down is the recipe for momo..

Explanation:

recipe..

. Sieve the wheat flour carefully to remove lumps.

. Add water and knead the flour well to prepare a dough

. Remove the skin of the boiled potato ,cut into small pieces

. Heat the cooking oil in frying pan, and fry the pieces of onions cabbage green chili tomato pea etc.

. Prepare a mix veg stuffing by mixing potato other vegetables , green coriander and salt.

. Prepare a small balls of dough and roll it out of belna.

. Put 10 gm of mix vegetables stuff in the center of rolled dough and close it from all the sides to make a small ball.

. steam the momo for 10-15 minutes. After that it will be ready to serve.

. A sauce or pickle is usually eaten with momo.

6 0
3 years ago
What is the longest wavelength in the Balmer series? (Hint: the Rydberg constant for Hydrogen is 1.096776×107 1/m, and the Balme
boyakko [2]

<u>Answer:</u> The longest wavelength of light is 656.5 nm

<u>Explanation:</u>

For the longest wavelength, the transition should be from n to n+1, where: n = lower energy level

To calculate the wavelength of light, we use Rydberg's Equation:

\frac{1}{\lambda}=R_H\left(\frac{1}{n_i^2}-\frac{1}{n_f^2} \right )

Where,

\lambda = Wavelength of radiation

R_H = Rydberg's Constant  = 1.096776\times 10^7m^{-1}

n_f = Higher energy level = n_i+1=(2+1)=3

n_i= Lower energy level = 2    (Balmer series)

Putting the values in above equation, we get:

\frac{1}{\lambda }=1.096776\times 10^7m^{-1}\left(\frac{1}{2^2}-\frac{1}{3^2} \right )\\\\\lambda =\frac{1}{1.5233\times 10^6m^{-1}}=6.565\times 10^{-7}m

Converting this into nanometers, we use the conversion factor:

1m=10^9nm

So, 6.565\times 10^{-7}m\times (\frac{10^9nm}{1m})=656.5nm

Hence, the longest wavelength of light is 656.5 nm

4 0
3 years ago
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