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Mariana [72]
3 years ago
9

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.

Chemistry
1 answer:
shepuryov [24]3 years ago
5 0

Answer: 2C4H10(g) + 13O2(g)----->8CO2(g) + 10H2O(g)

Explanation:

From the general formula for combustion of alkanes:

CnH2n+2 + 3n+1/2 O2------------> nCO2 + (n+1)H2O

We have:

C4H10(g) + 13/2 O2(g) ---------> 4 CO2(g) + 5H2O(g)

Now we can multiply by 2 to obtain the lowest whole number coefficients

2C4H10(g) + 13O2 (g) ---------->8CO2(g) + 10 H2O(g)

We had to multiply by two because it is the integer that will give us the lowest coefficient. Multiplying through by 2 will give the expected result.

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Compared to the ideal bond angle, the actual/real bond angle in a molecule of water will be:______.
inna [77]

Answer: d. smaller.

Explanation:

Hybridization :

N=\frac{1}{2}[V+N+A-C]

N = number of electrons

where, V = number of valence electrons present in central atom i.e. oxygen = 6

N = number of monovalent atoms bonded to central atom=32

C = charge of cation = 0

A = charge of anion = 0

The number of electrons is 4 that means the hybridization will be sp^3 and the electronic geometry of the molecule will be tetrahedral.  The bond angle for tetrahedral geometry is 109.5^0

But as there are two atoms around the central oxygen, the third and fourth position will be occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent and the bond angle will be smaller than expected and is 104.5^0

8 0
3 years ago
What is the wavelength (in meters) of an electromagnetic wave whose frequency is 2.63 × 1012 s−1?
aleksklad [387]
To find the wavelength of an  electromagnetic wave for the given frequency can be determined by using the formulaSpeed=Wavelength x FrequencyWavelength=Speed/FrequencyGenerally Speed of the electromagnetic wave is 3x10^8 m/sBy substituting the values Wavelength=3x10^8 m/s / 2.63x10^12 s^-1Wavelength=1.14 x 10^-4 metres
4 0
3 years ago
Which of these elements has an atom with the most stable outer electron configuration? * Cl Ca Ne Na
SashulF [63]

Answer:

Neon (Ne) has the most stable outer electron configuration because the outer electron is completely filled and it has octet structure

Explanation:

The configuration of these elements is as follows;

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Ca₂₀ = 2,8,8,2 (the outer electron is 2)

Ne₁₀ = 2,8 (the outer electron is 8)

Na₁₁ = 2,8,1 (the outer electron is 1)

Based on the outer electron value above, Neon (Ne) has the most stable outer electron configuration because the outer electron is completely filled and it has octet structure.

6 0
3 years ago
According to LOCO mass, the mass of reactants and products are what?
eimsori [14]

Answer:

Equal

Explanation:

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

3 0
2 years ago
On number 5 I am really stuck can I have help please.
zmey [24]
Answer to this question is absorbed

5 0
3 years ago
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