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3 years ago

Richard sketched models of two different neutral isotopes of oxygen. If the

Chemistry

2 answers:

Tasya [4]3 years ago

5 0

Answer:c

Explanation:just did it

OLga [1]3 years ago

3 0

Answer:

its b

Explanation:

just did the test on A P E X

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NH3 is an example of A. an element. B. an atom. C. a mixture. D. a compound.

Keith_Richards [23]

Answer:

I believe it's an example of a compound.

4 0

4 years ago

Read 2 more answers

An aqueous solution of sodium sulfide is allowed to react with an aqueous solution of magnesium chloride.

olya-2409 [2.1K]

Answer : The correct option is, (b) $2Na^+$

Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The balanced molecular equation will be,

$Na_2S(aq)+MgCl_2(aq)\rightarrow 2NaCl(aq)+MgS(s)$

The complete ionic equation in separated aqueous solution will be,

$2Na^+(aq)+S^{2-}(aq)+Mg^{2+}(aq)+2Cl^{-}(aq)\rightarrow 2Na^+(aq)+2Cl^{-}(aq)+MgS(s)$

In this equation the species $Na^+\text{ and }Cl^{-}$ are the spectator ions.

Hence, the complete ionic equation contains specie is $2Na^+$

4 0

3 years ago

What is the correct name

Inessa05 [86]

Answer:

The Answer is 2-methylpentane

Or the third one down.

Explanation:

5 0

3 years ago

Read 2 more answers

What describes how the bond between two oxygen atoms is formed

HACTEHA [7]

The bond that exist between two oxygen atoms is called a double covalent bond. This bond involves the sharing of four electrons to obtain a more stable structure. This type of bond is much stronger than the single covalent bond. They are much harder to break.

4 0

4 years ago

Barium has a body-centered cubic structure. If the atomic radius of barium is 222 pm, calculate the density of solid barium?

Flauer [41]

Answer: density =3.377g/cm³

Explanation:

Density =( molecular weight × effective number of atoms per unit cell) / (volume of unit cell × avogadro constant)

D= (M ×n) /(V×A)

M= 137g/mol

n= 2 (For BCC)

V=a³ , where a= 4r/√3

a= (4×222)/√3

a=512.69pm

a= 512.69×10^-10cm

V= ( 512.69×10^-10)^3

V= 1.3476×10^-22cm³

D= (137×2)/(1.3476×10^-22 × 6.02^23)

D= 3.377g/cm³

Therefore the density of barium is 3.377g/cm³

5 0

3 years ago