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2 years ago

4. Write the chemical formulas for the following compounds:

1 answer:

4 0

Lithium oxide ( Li2O)
Carbon monoxide ( CO )
Carbon tetrachloride ( CCl4 )
Nitrogen trifluoride ( NF3 )
Calcium chloride ( CaCl2)

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Write a balanced chemical equation for the incomplete combustion of gaseous ethane (C2H6). What is the sum of the coefficients i

Delicious77 [7]

Answer:

C2H6 +02 ===>Co2 + H20.

Explanation:

7 0

3 years ago

Diamond is a natural form of pure carbon. What number of atoms of carbon are in a 1.00-carat diamond (1.00 carat = 0.200 g)?

slega [8]

Answer:

1.004×10²²

Explanation:

The molar mass of carbon is 12 g/mol

which means that:

1 mole of carbon atoms has a mass of 12 grams.

Since, diamond is a allotrope of carbon.

Mass of 1.00-carat diamond in grams is:

1.00 carat = 0.200 g

Since, 1 mole of C contains 6.022×10²³ atoms of C

So,

12 grams contains 6.022×10²³ atoms of C

1 gram contains 6.022×10²³/ 12 atoms of C

0.200 gram contains (6.022×10²³/ 12)×0.200 atoms of C

Thus,

1 carat diamond contains 1.004×10²² atoms of C.

8 0

3 years ago

For the following reaction, find the value of Q and predict the direction of change, given that a 1L flask initially contains 2

Tresset [83]

Answer:

C) Q < K, reaction will make more products

Explanation:

1/8 S8(s) + 3 F2(g) ↔ SF6(g)

∴ Kc = 0.425 = [ SF6 ] / [ F2 ]³

∴ Q = [ SF6 ] / [ F2 ]³

∴ [ SF6 ] = 2 mol/L

∴ [ F2 ] = 2 mol/L

⇒ Q = ( 2 ) / ( 2³)

⇒ Q = 0.25

⇒ Q < K, reaction will make more products

5 0

3 years ago

The modern view of an electron orbital in an atom is best described as

Mrrafil [7]

invisable

you probably dont want to put that...

5 0

3 years ago

Given the formula representing a molecule:

Aleksandr [31]

Answer:

B) Symmetrical and nonpolar

Step-by-step explanation:

The formula is H-C≡C-H.

Each C atom has two electron regions, so VSEPR theory predicts a linear molecular geometry (see image below).

The molecule is symmetrical, because the green line divides the molecule into two halves that are mirror images of each other.

The C-H bonds are slightly polar, because C is more electronegative than H (µ ≈ 0.4 D).

The C atoms are partially negative (red), while the H atoms are partially positive (blue).

However, the two C-H bond dipoles point in opposite directions, so they cancel each other. The molecule has no net dipole moment.

Acetylene is nonpolar.

3 0

3 years ago

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