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igor_vitrenko [27]
3 years ago
15

help!! i tried answering these on my own and turning it into my teacher and she said they were all wrong , can somebody help me

out here? if i could get the answers but also a slight explanation so i can understand please. id be extremely grateful

Chemistry
1 answer:
Kobotan [32]3 years ago
6 0
I don't know what your answers were but the more "stuff" there is the more energy it takes to freeze or boil it. Hope this could help
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NH3 is nitrogen trihydride (ammonia) and BF3 is boron trifluoride. What is the name for AlCl3 and why?
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The answer is A. Aluminum Chloride it does not have the prefix "tri-" since it is ionic.
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3 years ago
Cuando el oxígeno reacciona con el calcio produce un sólido blanco muy utilizado en la preparación de cementos. ¿Cuál de las sig
8_murik_8 [283]

Answer:

2Ca + O₂ → 2CaO

Explanation:

Cuando el Calcio (Ca) reacciona con oxígeno (O₂) se produce cal (CaO). La cal es un sólido inodoro de color blanco a grisáceo. La cal es un óxido que se encuentra presente en el cemento y su cuantificación permite determinar la calidad y el tipo de cemento a utilizar.

La reacción que describe el proceso anterior es:

Ca + O₂ → CaO

Para balancear los oxígenos, se deben poner 2 CaO como producto:

Ca + O₂ → 2CaO

Para balancear los calcios, se pone como coeficiente del Ca un 2:

<h3>2Ca + O₂ → 2CaO</h3><h3 />

Esta última es la reacción que describe el proceso anterior

6 0
3 years ago
How is a lithium atom (Li) different from a lithium ion (Li+)
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A Lithium atom that has lost ONE Electron, is called a Lithium Ion (Li+).
3 0
3 years ago
A gas has a volume of 1000.0 mL at a temperature of 20.OK and a pressure
yanalaym [24]

Answer:

4000mL

Explanation:

Using the combined gas law equation as follows:

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (mL)

V2 = final volume (mL)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information given in this question:

V1 = 1000mL

T1 = 20K

P1 = 1.0atm

V2 = ?

P2 = 0.5atm

T2 = 40K

Using P1V1/T1 = P2V2/T2

1 × 1000/20 = 0.5 × V2/40

1000/20 = 0.5V2/40

50 = 0.5V2/40

50 × 40 = 0.5V2

2000 = 0.5V2

V2 = 2000/0.5

V2 = 4000mL

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3 years ago
The normal boiling point of benzene is 80.1°C. What is its enthalpy of vaporization if the vapor pressure at 26.1°C is 100 torr?
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The answer is, 33.0 kJ/mol
6 0
3 years ago
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