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irina [24]
4 years ago
11

COMPOSICIÓN PORCENTUAL

Chemistry
1 answer:
Allisa [31]4 years ago
8 0
Óxido de hierro (lll)
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What is the only part of an atom that cannot change (either protons, neutrons, or electrons)?
d1i1m1o1n [39]
The number of protons never changes in an atom. More electrons means a negative charge and fewer means a positive charge. Once an atom has an electrical charge it is called an ion. In an ion the atomic number and atomic mass do not change from the original.
3 0
3 years ago
The vapor pressure of a substance describes how readily molecules at the surface of the substance enter the gaseous phase. At th
geniusboy [140]

Answer:

84.75°C is the boiling point of water at an elevation of 7000 meter.

Explanation:

Rate of change of pressure = 19.8 mmHg/1000 ft

1 foot = \frac{1}{3.28} meter

19.8 mmHg/1000 ft=\frac{19.8}{1000}\times 3.28 mmHg/m=0.065 mmHg

Pressure change for every 1 m = 0.065 mmHg × 1= 0.065 mmHg

Elevation      Pressure

     0 m       760 mmHg

1000 m       695 mmHg

2000 m       630 mmHg

Pressure drop at the elevation of 7000 m: 7000\times 0.065 mmHg=455 mmHg

Pressure at 7000 m = 760 mmHg - 455mmHg = 305 mmHg

The boiling point of water decreases 0.05°C for every 1 mmHg drop in atmospheric pressure.

At 7000 meter elevation the boiling of water will be :

0.05^oC\times 305=15.25^oC

Boiling point of water at 7000 meter elevation :

100.0^oC-15.25^oC =84.75^oC

84.75°C is the boiling point of water at an elevation of 7000 meter.

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4 years ago
What are the three zones in almost all human cells?
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C - nucleus, cytoplasm, plasma membrane.
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2 years ago
How many L are in 1,500cm^3<br><img src="https://tex.z-dn.net/?f=1500%7Bcm%7D%5E%7B3%7D%20%3D%20%5C%3A%20...%20%20%5C%3A%20liter
irga5000 [103]
1.5 liters are in 1,500cm^3.
8 0
3 years ago
The graph below shows a toy cart's displacement while traveling on a small track. Line segment AB in the graph below is showing
Sauron [17]

Answer:

it is at a constant speed

Explanation:

because the line is straight

5 0
3 years ago
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