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larisa [96]
3 years ago
9

Horizontal lines indicating a phase change will be at different temperatures depending on the substance.

Chemistry
2 answers:
fredd [130]3 years ago
4 0

Answer:

true

Explanation:

I just know

ieuehdjrj

GalinKa [24]3 years ago
4 0
Yeah its true your welcome
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When a boron atom loses its valence electrons, what is the formula for the resulting ion?
kirill [66]

Answer:

option b. B3+

Explanation:

Boron takes the 5th position on the periodic table, therefore it has 5 electrons....2 on the inside and 3 on the outside. when it lost it 3 external electrons, it become positively charged with the amount of electron it loses.

8 0
3 years ago
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A gas originally at 27 °c and 1.00 atm pressure in a 2.6 l flask is cooled at constant pressure until the temperature is 11 °c.
elena55 [62]
Charles law gives the relationship between volume and temperature of gas at constant pressure 
it states that at constant pressure, volume of gas is directly proportional to temperature 
V/T = k
where V - volume T - temperature and k - constant 
\frac{V1}{T1} =  \frac{V2}{T2}
parameters for the first instance are on the left side of the equation and parameters for the second instance are on the right side of the equation
T1 - temperature in Kelvin - 27 °C + 273 = 300 K
T2 - 11 °C + 273 = 284 K
substituting the values in the equation 
2.6 L / 300 K = V / 284 K 
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New volume of the gas is 2.46 L
8 0
3 years ago
Hands moving on a battery-operated clock is an example of what kind of
Alexxandr [17]
The C is right answer
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3 years ago
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A mixture of pepper and water is a suspension because ________ HELPPPP
malfutka [58]
It doesn't because pepper does not dissolve
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3 years ago
Help me with these questions :)
maxonik [38]

Answer:

1 ) H2O 2) Hydrogen and oxygen 3) Compound

Explanation:

1) To write a chemical formula, you write the number of molecules of an element (2 hydrogen atoms + 1 Oxygen atom, or H2O). The letters represent the element's notation on the periodic table, while the number that follows it represents the number of atoms of that particular element within the compound. If there is no number that follows the letter, there is only one.

2) Letter "H" on the periodic table represents hydrogen, while "O" represents oxygen

3) You can tell that this is a compound because it is made of two or more elements found on the periodic table

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3 years ago
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