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Umnica [9.8K]
3 years ago
11

In his science class, Mr. Brown heats a small amount of iodine in a test tube. The iodine changes into a pink gas without changi

ng into liquid. What is this process called
A) condensation
B) deposition
C) evaporation
D) melting
E) sublimation
Chemistry
2 answers:
avanturin [10]3 years ago
4 0

the answer is sublimation or E              

umka21 [38]3 years ago
3 0
The answer is sublimation 
sublimation is the process that turns from solid directly into a gas without turning into a liquid first
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You need to prepare 150 mL of 0.1 M solution of silver chloride. How much silver chloride is required?
Rudiy27

Answer:

amount of silver chloride required is 0.015 moles or 2.1504 g

Explanation:

0.1M AgCL means 0.1mol/dm³ or 0.1mol/L

1L = 1000mL

if 0.1mol of AgCl is contained in 1000mL of solution

then x will be contained in 150mL of solution

cross multiply to find x

x = (0.1*150)/1000

x= 0.015 moles

moles of silver chloride present in 150 mL of solution is 0.15 moles

To convert this to grams, simply multiply this value by the molar mass of silver chloride

molar mass of silver chloride AgCl =107.86 + 35.5

                                                     =143.36 g/mol

mass of AgCl = moles *molar mass

                       =0.015*143.36

                        =2.1504g

                        =

4 0
3 years ago
A 5.0-kg box is pushed across the floor with a force of 32 N. What is the frictional force on the box if the box's acceleration
Slav-nsk [51]
From\ 2nd\ Newton\ Law\ resultuant\ force: \\\\\ F_R=m*a=5kg*3,6\frac{m}{s^2}=18N\\\\
F=32N\\\\
F_f- friction\ force\\\\
F_R=F-F_f\\\\
F_f=F-F_R=32N-18N=14N\\\\Friction\ force\ is\ equal\ to\ 14\ N.
3 0
3 years ago
Read 2 more answers
Hydrocarbons are compounds that contain
Mademuasel [1]
2) carbon and hydrogen only.
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3 years ago
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Nutka1998 [239]

Answer:

20 mL

Explanation:

<em>The student should record 20 mL as the correct volume.</em>

The curved surface of a liquid that is usually observed in a buret is referred to as the meniscus. This meniscus is created as a result of the surface tension of the liquid against the walls of the buret. <u>Hence, in order to avoid errors due to parallax, the bottom of the meniscus should be read and not the top.</u>

Therefore, the correct volume that the student should record is 20 mL.

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A student reads the label on the bottle of salad dressing shown below.
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The best option is a. but it is not complete!

Both liquids have different densities, it's true. But they are immiscible liquids and they don't form a solution.
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