In what way are atoms Of oxygen most different from atoms of nitrogen

Express this number in scientific notation 50000

Kazeer [188]

Answer:

We write 50,000 in scientific notation,

it is written as 5 x 10⁴.

Hope it helps.

6 0

3 years ago

Read 2 more answers

The Al2O3 crystal structure (corundum) consists of an HCP arrangement of O2- ions; the Al3+ ions occupy octahedral positions. Wh

vesna_86 [32]

Answer:

The fraction of the available octahedral positions are filled with $Al^{3+}$ ions is $\frac{2}{3}$

Explanation:

If there are n numbers of spheres in HCP in packing:

Number of octahedral void = n

Number of tetrahedral void = 2n

Total number of voids = n + 2n = 3n

The $Al_2O_3$ crystal structure consists of an HCP arrangement of $O^{2-}$ ions.

Number of spheres in HCP = 6

Number of $O^{2-}$ = 6

Number of octahedral voids = 6

Number of tetrahedral void = 12

Number of aluminum ions when there are 6 $O^{2-}$ ion = $\frac{2}{3}\times 6= 4$

Number of voids in which $Al^3+$ ions are present = 4

The fraction of the available octahedral positions are filled with $Al^{3+}$ ions = $\frac{4}{6}=\frac{2}{3}$

5 0

4 years ago

What is calcium's matching element

vodomira [7]

Answer: Explanation:

Calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. It is the most abundant metallic element in the human body and the fifth most abundant element in Earth's crust.

...

Calcium.

atomic number 20

oxidation state +2

electron configuration 1s22s22p63s23p64s2

Explanation:

8 0

3 years ago

Need this ASAP PLEASE

ss7ja [257]

SOLVENT- A substance (usually a liquid) capable of dissolving one or more pure substances. SOLUTE- Solid, liquid or gas that is dissolved in a solvent. SOLUTION- A homogeneous (looks the same throughout) mixture of a solvent and one or more solutes. AQUEOUS SOLUTION- Solution in which water is the solvent.
Answer

it raises the boiling point substance is dissolved in water

7 0

3 years ago

A room is a cube that measures 4 meters in each dimension. If the temperature changes from 10 C to 30 C, and the pressure decrea

Katen [24]

Answer:

More air will enter the room since the volume of the room increases.

Explanation:

We'll begin by calculating the initial volume (V₁) of the room. This can be obtained as follow

Length (L) of room = 4 m

Initial volume (V₁) =..?

V₁ = L³

V₁ = 4³

V₁ = 64 m³

Next, we shall determine if there is an increase in the volume of the room or not. This can be obtained as follow:

Data obtained from the question include:

Initial volume (V₁) = 64 m³

Initial temperature (T₁) = 10 °C + 273 = 283 K

Final temperature (T₂) = 30 °C + 373 = 303 K

Initial pressure (P₁) = 760 mmHg

Final pressure (P₂) = 718 mmHg

Final volume (V₂) =?

P₁V₁/T₁ = P₂V₂/T₂

760 × 64 / 283 = 718 × V₂ / 303

48640 / 283 = 718 × V₂ / 303

Cross multiply

283 × 718 × V₂ = 48640 × 303

203194 × V₂ = 14737920

Divide both side by 203194

V₂ = 14737920 / 203194

V₂ = 72.53 m³

SUMMARY

Initial volume (V₁) of room = 64 m³

Final volume (V₂) of room = 72.53 m³

From the calculations made above, we can see that the volume of the room increases from 64 m³ to 72.53 m³. Thus more air will enter the room since the volume of the room increases.

6 0

3 years ago