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EleoNora [17]
3 years ago
11

Why is aluminum a substance

Chemistry
2 answers:
Advocard [28]3 years ago
5 0
<span>Aluminium is a chemical element in the boron group with symbol Al and atomic number 13. It is a silvery-white, soft, nonmagnetic, ductile metal. Aluminium is the third most abundant element, and the most abundant metal, in the Earth's crust   that is why</span>
lidiya [134]3 years ago
4 0
Aluminum is a substance because it is a particular type of matter that has particular and unique properties. aluminum is a unique element with a place on the periodic table
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Lithium and nitrogen react to produce lithium nitride:
garri49 [273]

Answer:

B : 0.133 M

Explanation:

moles Li3N3 = 0.4 mol Li x (2 moles Li3N/6 moles Li) = 0.133 M

7 0
3 years ago
Question 1: The mixture that can be separated by filtration is:
posledela

Answer:

Filtration is a process in which insoluble matter is separated from a liquid. Filtration is a separation process in which a mixture is passed through a filter that allows one component to pass-through but blocks another component from passing through because of its matter and consistency. Heterogeneous mixtures can be separated into their respective constituents. For example, a mixture of mud and water can be separated through filtration process easily, because water being liquid will pass through the filter paper easily but the mud will not because of it being solid

7 0
3 years ago
Read 2 more answers
Calculate the decrease in temperature (in Celsius) when 2.00L at 21.0*C is compressed to 1.00.
Anna71 [15]

Decrease in temperature is -126.0°C

<u>Explanation:</u>

Using Charles law we can set up the equation as,

V₁/T₁ = V₂/T₂

(2.00 L) / 294.0 K) = (1.00 L) / (x)

cross multiply to get:

2x = 294

2x/2 = 294/2

x = 147.0 K

Now kelvin is converted into Celsius by subtracting 273 from 147 as,

147 - 273 = -126°C

8 0
4 years ago
An element has two isotopes. One has a mass of 5.03 amu and an abundance of 25%, the other has a mass of 7.20 amu and an
pav-90 [236]

Answer:

Average atomic mass = 6.6575.

Explanation:

As fractions the abundance is 1/4 and 3/4.

The average atomic mass =  (5.03 + 3(7.20) / 4

= 6.6575.

5 0
3 years ago
Please guysssss
mina [271]
If you would draw the Lewis structures of these atoms, you would see that A has 2 electron pairs and 2 lone electrons (that can bond). For B you’d see that you only have 1 electron that can form a bond. This means that 1 atom of A (2 lone electrons) can bond with 2 atoms of B. To know the kind of bond you have to know wether or not there will be a ‘donation’ of an electron from one atom to another. This happens when the number of electrons on one atoms is equal to the number of electrons another atom needs to reach the noble gas structure. As you can see, this is not the case here. This means that you get an AB2 structure with covalent character.
6 0
3 years ago
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