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Alinara [238K]
3 years ago
11

2)What is the downside to having concrete as the second most consumed resource in the world?

Chemistry
1 answer:
VladimirAG [237]3 years ago
5 0

Answer:

Concrete sucks up a 10th of the worlds industrial water use. It also worsens the problem of silicosis and respiratory disease.

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PLS HELP ME, use the periodic table to write the electron configuration of selenium
EastWind [94]

Answer:

[Ar] 3d10 4s2 4p4

Explanation:

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4

6 0
2 years ago
2. How does the way elements are grouped in the periodic table serve as an advantage to scientists?
Goryan [66]
When looking down the groups the elements have an equal number of electrons in the outer shell. This means they react in a similar way making it easier for scientists to use. 
6 0
4 years ago
Why do you think scientist can use the basic properties of matter to help identify an unknown substance?
deff fn [24]

They can use the properties to test and come to some kind of conslusion about the object because in some way it's gotta correlate back to one of the different properties of matter.

4 0
3 years ago
Question 5
pantera1 [17]

Answer: The coefficient for the diatomic oxygen (O2) is 3.

Explanation:

To know the coefficient for the diatomic Oxygen, we need to balance the equation.

Fe + O2 ------->   Fe2O3

LHS of the equation; Fe =  1    , O2 = 1

RHS of the equation; Fe = 2 ,  O = 3

∴ Multiply 'Fe' on the LHS of the equation by 4 and O2 by 3

   Doing that will give the balance equation which is;

   4 Fe +  3 O2  --------> 2 Fe2O3

The coefficient for the diatomic oxygen (O2) as seen from the equation is 3.

7 0
3 years ago
Compared with halogens, the alkali metals in the same period has
Rufina [12.5K]
Alkali metals have the lowest electronegativities, while halogens have the highest.
3 0
3 years ago
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