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OLga [1]
4 years ago
10

When group 2A element from ion they

Chemistry
1 answer:
Anarel [89]4 years ago
4 0
Well, knowing that group 2A elements are metals, and metals lose electrons to gain a full electron shell, we can eliminate B and D. Knowing that these are 2 electrons, that the group 2A element provides to another atom, to form an ion.

The solution is C. Lose 2 electrons.
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Calculate the displacement (the total volume of the cylinder through which the piston move) of a 5.70L automobile engine in cubi
Novay_Z [31]

Answer:

348 inches³

Explanation:

From our previous knowledge of  units conversion:

We know that 1000 cm³ makes 1 Liter.

Thus, for  a 5.70 L automobile engine in cubic meters will be:

= 5.70 × 1000 cm³

= 5700 cm³

Now, the displacement of the automobile in cubic inches provided that 1 inch = 2.534 cm is:

⇒ 5700× (1/ (2.54)³) in³

= 5700×0.0610 in³

= 347.7 in³

≅ 348 inches³

4 0
4 years ago
The following reaction was performed in a sealed vessel at 791 ∘C : H2(g)+I2(g)⇌2HI(g) Initially, only H2 and I2 were present at
OlgaM077 [116]

Answer:

4.31 × 10²

Explanation:

Equation of the reaction;

H_{2(g)} + I_{2(g)}     ⇌     2HI_{(g)

The ICE Table is shown as follows:

                            H_{2(g)}         +         I_{2(g)}        ⇌     2HI_{(g)

Initial                    3.10                     2.50                  0      

Change                 - x                       -x                     + 2x      

Equilibrium        (3.10 - x)                0.0800              2x

From I_{2(g)}   ;

We can see that 2.50 - x = 0.0800

So; we can solve for x;

x = 2.50 - 0.0800

x = 2.42

H_{2(g)}  which = (3.10 -x) will be :

= 3.10 - 2.42

= 0.68

2HI_{(g) = 2x

= 2 (2.42)

= 4.84

K_c = \frac{[HI]^2}{[H_2][I_2]}

K_c = \frac{(4.84)^2}{(0.68)(0.0800)}

K_c =\frac{23.4256}{0.0544}

K_c = 430.62

K_c ≅ 431

K_c = 4.31 × 10²

6 0
3 years ago
How do scientists use statistics?​
goldenfox [79]

Answer:

Mathematics

Explanation:

Scientists in their own way use different types of statistics. As a child I went to a scientist lab and it was huge they had microscopes, animals in glass boxes, they use math to try to figure things out.

8 0
3 years ago
According to Dalton’s atomic theory, atoms:
sammy [17]

Answer:

C

Explanation:

Dalton's atomic theory are: Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed. All atoms of an element are identical. The atoms of different elements vary in size and mass.

6 0
3 years ago
What is the molecule polarity of SiCl4????
mars1129 [50]

Answer:

Silicon Tetrachloride:Explanation:

Silicon tetrachloride has the formula SiCl4. It is a covalent compound, which means that electrons are shared between the silicon atom and the chlorine atoms. The bond angles between the chlorine atoms and the silicon depend on the molecule's shape.

7 0
4 years ago
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