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ValentinkaMS [17]
2 years ago
9

Iodine is blue-black, crystalline, and solid. It sublimes to a violet-colored gas and reacts with aluminum and many other metals

. Which of these five properties are physical? (Select all that apply.) blue-black crystalline solid sublimes to a violet-colored gas reacts with aluminum and many other metals Which are chemical? (Select all that apply.) blue-black crystalline solid sublimes to a violet-colored gas reacts with aluminum and many other metals
Chemistry
1 answer:
Pepsi [2]2 years ago
4 0

Answer:

  • blue-black PHYSICAL PROPERTY
  • crystalline PHYSICAL PROPERTY
  • solid PHYSICAL PROPERTY
  • sublimes to a violet-colored gas PHYSICAL PROPERTY
  • reacts with aluminum and many other metals CHEMICAL PROPERTY

Explanation:

Chemical properties are visible through chemical reactions, in which the chemical identity changes to form new substances. On the other hand, physical properties are evident without a change in the identity of a substance.

<em />

<em>Which of these five properties are physical and which are chemical?</em>

  • blue-black PHYSICAL PROPERTY
  • crystalline PHYSICAL PROPERTY
  • solid PHYSICAL PROPERTY
  • sublimes to a violet-colored gas PHYSICAL PROPERTY
  • reacts with aluminum and many other metals CHEMICAL PROPERTY
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) A round or oval hole through a bone, which contains blood vessels and/or nerves, is called a __________.
grigory [225]
The answer is foramen, which means opening.

This is term used in anatomy.

Its plural is foramina.

The foramina tipically allow the connection of two parts of the body through bloed vessels (arteries, veins) or nerves.
8 0
2 years ago
The reaction N2 + 3 H2 → 2 NH3 is used to produce ammonia. When 450. g of hydrogen was reacted with nitrogen, 1575 g of ammonia
tiny-mole [99]

Answer:

The percent yield of this reaction is 70%

Explanation:

The reaction is: N₂ + 3H₂ → 2NH₃

We only have the mass of H₂, so we assume that N₂ is in excess

We convert the mass to moles, to work with the reaction:

450 g . 1mol / 2 g = 225 moles

Ratio is 2:3. 3 moles of H₂ can produce 2 moles of ammonia

Therefore 225 moles of H₂ will produce (225 .2)/ 3 = 150 moles

This is the 100% yield reaction → We convert the moles of NH₃ to mass

150 mol . 17g /1mol = 2550 g

Percent yield = (Produced yield/Theoretical yield) .100

Percent yield = (1575g/2550g) . 100 = 70%

7 0
2 years ago
How many significant figures are in 6000
BlackZzzverrR [31]

Significant figures are the numbers that compose a whole number.

Since there are 4 digits in 6000 and it's a whole number, the answer is 4.


Hope it helped,


BioTeacher101

3 0
2 years ago
Read 2 more answers
Two students are given different samples of a substance and are instructed to determine the properties of the substance.
Hunter-Best [27]

The complete question is given below:

Two students are given different samples of a substance and are instructed to determine the properties of the substance.  

Which statement describes a property that will be the same for both students?

A. color because it is an extensive property

B. mass because it is an extensive property

C. boiling point because it is an intensive property

D. volume because it is an intensive property .

ANSWER

The correct option is C.

The physical properties of substances are divided into two, intensive and extensive properties.

Intensive properties refers to those features of a substance that do not depend on the quantity of the material that is available. Whether the sample available is big or small, the intensive properties remain the same. Examples of intensive properties are:  melting point, boiling point, refractive index, hardness, density color, etc. This question is asking us to look for an intensive property.

Extensive properties refers to those characteristics of a substance that depend on the amount of substance present. Examples of these properties are: mass, volume, size, weight, length, etc.

From the options given, option A is wrong because color is not an extensive property, it is intensive. Option B is wrong because the mass depend on the amount of sample given and the same thing apply to option D.

The correct option is C,  because no matter the quantity of that substance that you have, the boiling point will always remains the same.  

6 0
2 years ago
How many chloride ions are in a 220 grams of calcium chloride?
fomenos
The Ions present in CaCl₂ are,

                                                 Ca²⁺    Cl⁻     Cl⁻

Means 1 formula unit contains 1 Ca²⁺ ion and 2 Cl⁻ ions.

Also, 1 mole of CaCl₂ contains 6.022 × 10²³ formula units.

So, 1 mole formula units of CaCl₂ contain,

                                            2 × 6.022 × 10²³  =  1.20 × 10²⁴ Cl⁻ Ions

Now, Calculating number of moles contained by 220 g of CaCl₂,
As,
                               110.98 g of CaCl₂  =  1 mole
Then, 
                                    220 g of CaCl₂  =  X moles
Solving for X,
                                                 X  =  (220 g × 1 mol) ÷ 110.98 g

                                                 X  =  1.98 moles
As,
                           1 mole contained  =  1.20 × 10²⁴ Cl⁻ Ions
Then,
                    1.98 mole will contain  =  X Cl⁻ Ions
Solving for X,
                                                  X  =  (1.98 mol × 1.20 × 10²⁴ Ions) ÷ 1mol

                                                  X  =  2.38 × 10²⁴ Cl⁻ Ions
6 0
2 years ago
Read 2 more answers
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