All categories

3 years ago

How do I know if covalent compounds are polar bond by only seeing their chemical formula?

Chemistry

1 answer:

NNADVOKAT [17]3 years ago

3 0

if the compound is made of just two elements, if one is a metal (ie belongs to any of groups 1, 2 or 3) and the other element a non metal, (ie belongs to group 5, 6 or 7) then the compound is most likely to be an ionic compound. For example NaCl, MgO
If the compound is made of identical non metalic elements as in O2, Cl2 then the compound is covalent
If the compoud is made of just two elements that are both non metals such as in SO2, CO, NO, CCl4, the compound is covalent
If the compound is made up of more than two elements, such as in HNO3, Na2CO3, CuSO4.5H2O, you may need to break the compound into dissociating parts. You will see that, the compounds are ionic.
Hydrocarbons, compounds containing only hydrogen and carbon of varying molecular size are all covalent. Examples are C2H6, C2H4, C2H2

Note that there could be some little exceptions to the examples given. Mostly with first members of every group because of their small size which make them show substantial deviations from group behavior. For example HCl is covalent not ionic.

You might be interested in

Which tool should Darla and Rob use to measure the force that pulls a car down the map

svetoff [14.1K]

Answer:

C. A Spring Scale

Explanation:

Using process of elimination, we can quickly decide that a stopwatch and a ruler will not be useful in measuring the force. This leaves us with either the spring scale or a balance scale. A balance scale is used to compare two weights, so this is eliminated. That leaves us with a spring scale. This is because we can attached the spring scale to the car and when we let it go, we can record the force. I hope this helps!

5 0

2 years ago

What is the maximum mass of ammonia that can be formed when 36.52 grams of nitrogen gas reacts with 10.62 grams of hydrogen gas

k0ka [10]

The maximum mass of NH₃ that can be formed when 36.52 g of N₂ reacts with 10.62 g of H₂ is 44.35 g

<h3>Balanced equation </h3>

N₂ + 3H₂ —> 2NH₃

Molar mass of N₂ = 14 × 2 = 28 g/mol

Mass of N₂ from the balanced equation = 1 × 28 = 28 g

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mass of H₂ from the balanced equation = 3 × 2 = 6 g

Molar mass of NH₃ = 14 + (3×1) = 17 g/mol

Mass of NH₃ from the balanced equation = 2 × 17 = 34 g

SUMMARY

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂ to produce 34 g of NH₃

<h3>How to determine the limiting reactant </h3>

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

36.52 g of N₂ will react with = (36.52 × 6) / 28 = 7.83 g of H₂

From the above calculation, we can see that only 7.83 g out of 10.62 g of H₂ are required to react completely with 36.52 g of N₂.

Therefore, N₂ is the limiting reactant

<h3>How to determine the maximum mass of NH₃ produced </h3>

From the balanced equation above,

28 g of N₂ reacted to produce 34 g of NH₃

Therefore,

36.52 g of N₂ will react to produce = (36.52 × 34) / 28 = 44.35 g of NH₃

Thus, the maximum mass of NH₃ obtained from the reaction is 44.35 g

Learn more about stoichiometry:

brainly.com/question/14735801

#SPJ1

4 0

2 years ago

PLS HELP! Suppose you have a sample of an unknown mineral with a mass of 86 g. You place the sample in a graduated cylinder fill

bija089 [108]

O le elo ma muli pipilo ma le kaoga e fai gi o meaoga

4 0

3 years ago

6. The graph below shows the heating curve for ethanol (from –200C to 150C). Calculate the amount of heat (kJ) required for each

Kazeer [188]

This problem is providing the heating curve of ethanol showing relevant data such as the initial and final temperature, melting and boiling points, enthalpies of fusion and vaporization and specific heat of solid, liquid and gaseous ethanol, so that the overall heat is required and found to be 1.758 kJ according to:

<h3>Heating curves:</h3>

In chemistry, we widely use heating curves in order to figure out the required heat to take a substance from a temperature to another. This process may involve sensible heat and latent heat, when increasing or decreasing the temperature and changing the phase, respectively.

Thus, since ethanol starts off solid and end up being a vapor, we will find five types of heat, three of them related to the heating-up of ethanol, firstly solid, next liquid and then vapor, and the other two to its fusion and vaporization as shown below:

$Q_T=Q_1+Q_2+Q_3+Q_4+Q_5$

Hence, we begin by calculating each heat as follows, considering 1 g of ethanol is equivalent to 0.0217 mol:

$Q_1=0.0217mol*111.5\frac{J}{mol*\°C}[(-114.1\°C)-(-200\°C)] *\frac{1kJ}{1000J} =0.208kJ\\
\\
Q_2=0.0217mol*4.9\frac{kJ}{mol} =0.106kJ\\
\\
Q_3=0.0217mol*112.4\frac{J}{mol*\°C}[(78.4\°C)-(-114.1\°C)] *\frac{1kJ}{1000J} =0.470kJ\\
\\
Q_4=0.0217mol*38.6\frac{kJ}{mol} =0.838kJ\\
\\
Q_5=0.0217mol*87.5\frac{J}{mol*\°C}[(150\°C)-(78.4\°C)] *\frac{1kJ}{1000J} =0.136kJ$

Finally, we add them up to get the result:

$Q_T=0.208kJ+0.106kJ+0.470kJ+0.838kJ+0.136kJ\\
\\
Q_T=1.758kJ$

Learn more about heating curves: brainly.com/question/10481356

7 0

2 years ago

What is the resulting pressure when a sample of gas at 25°C in a 500 ml balloon

Natali5045456 [20]

Answer:

233.56 torr

Explanation:

We'll begin by converting celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 25 °C

Initial temperature (T₁) = 25 °C + 273

Initial temperature (T₁) = 298 K

Final temperature (T₂) = 75 °C

Final temperature (T₂) = 75 °C + 273

Final temperature (T₂) = 348 K

Next, we shall convert 2 L to mL. This can be obtained as follow:

1 L = 1000 mL

Therefore,

2 L = 2 L × 1000 mL / 1 L

2 L = 2000 mL

Finally, we shall determine the resulting pressure. This can be obtained as follow:

Initial temperature (T₁) = 298 K

Initial volume (V₁) = 500 mL

Initial pressure (P₁) = 800 torr

Final temperature (T₂) = 348 K

Final volume (V₂) = 2000 mL

Final pressure (P₂) =?

P₁V₁/T₁ = P₂V₂/T₂

800 × 500 / 298 = P₂ × 2000 / 348

400000 / 298 = P₂ × 2000 / 348

Cross multiply

P₂ × 2000 × 298 = 400000 × 348

P₂ × 596000 = 139200000

Divide both side by 596000

P₂ = 139200000 / 596000

P₂ = 233.56 torr

Therefore, the resulting pressure is 233.56 torr

3 0

3 years ago

How do I know if covalent compounds are polar bond by only seeing their chemical formula?​

How do I know if covalent compounds are polar bond by only seeing their chemical formula?