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timurjin [86]
3 years ago
13

The _____________ is the temperature at which a substance changes from solid to liquid; ________________ is the temperature at w

hich a substance changes from a liquid to as gas; ________________ is the process by which atoms of molecules leave a liquid and become a gas.
Chemistry
1 answer:
Aleksandr-060686 [28]3 years ago
5 0
The _____melting point________ is the temperature at which a substance changes from solid to liquid; _______boiling point_________ is the temperature at which a substance changes from a liquid to as gas; _______vapourisation_________ is the process by which atoms of molecules leave a liquid and become a gas.
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You have 100 mL of a 12M solution of HCl, and you need to dilute it to 1.5M for an experiment. How many liters will your new sol
sashaice [31]

Answer:

800.0 mL.

Explanation:

  • To solve this problem; we must mention the rule states the no. of millimoles of a substance before and after dilution is the same.

<em>(MV)before dilution of HCl = (MV)after dilution of HCl</em>

M before dilution = 12.0 M, V before dilution = 100.0 mL.

M after dilution = 1.5 M, V after dilution = ??? mL.

∵ (MV)before dilution of HCl = (MV)after dilution of HCl

∴ (12.0 M)(100.0 mL) = (1.5 M)(V after dilution of HCl)

<em>∴ V after dilution of HCl = (12.0 M)(100.0 mL)/(1`.5 M) = 800.0 mL.</em>

8 0
3 years ago
According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of th
grandymaker [24]
The masses are always equal. Since matter can not be created nor destroyed, you will have the same amount of mass as you did before the reaction as you do after. 
6 0
3 years ago
A sample of gas (1.9 mol) is in a flask at 21 °c and 697 mm hg. the flask is opened and more gas is added to the flask. the new
garik1379 [7]

To solve this problem, we assume ideal gas so that we can use the formula:

PV = nRT

since the volume of the flask is constant and R is universal gas constant, so we can say:

n1 T1 / P1 = n2 T2 / P2

 

1.9 mol * (21 + 273 K) / 697 mm Hg = n2 * (26 + 273 K) / 841 mm Hg

<span>n2 = 2.25 moles</span>

8 0
3 years ago
What is the chemical formula of (Sodium hydroxide ) ??​
Margaret [11]

\huge{ \color{black}{ \boxed{ \color{hotpink}{Answer}}}}

what is the chemical formula of (Sodium hydroxide ) ??

<h3> ⚘ NaOH</h3>
  • Sodium hydroxide, Sodium oxidanide

\:

\large\tt\:⚘ \: MishiChaeYoon \: ⚘

4 0
3 years ago
How many quantum numbers are used to describe the properties of electrons in atomic orbitals?
LenaWriter [7]
4 Quantum numbers are used

1.Azimuthal
2.Principal
3.Spin
4.Magnetic
6 0
3 years ago
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