All categories

4 years ago

What does polar and nonpolar mean in science

2 answers:

6 0

Polarity refers to the pull of electrons. Some elements like Fluorine and Oxygen pull electrons closer to them in their bonds (electronegativity), meaning they don't share them equally. So if they pull them closer, there is polarity in the molecule because there's a pull of electrons between atoms.

MissTica4 years ago

3 0

Polar molecules are molecules are essentially have no molecular symmetry.

Nonpolar molecules are molecules that have molecular symmetry.

Water is a very basic example of a polar molecule.

You might be interested in

The reaction A + B ⟶ C + D rate = k [ A ] [ B ] 2 A+B⟶C+Drate=k[A][B]2 has an initial rate of 0.0640 M / s. 0.0640 M/s. What wil

Lubov Fominskaja [6]

Answer :

(1) The initial rate when [A] is halved and [B] is tripled is, 0.288 M/s

(2) The initial rate when [A] is tripled and [B] is halved is, 0.096 M/s

Explanation:

The given rate law expression is:

$Rate=k[A][B]^2$

Now we have to determine the initial rate when [A] is halved and [B] is tripled.

The new rate law expression will be:

$Rate=k\times (\frac{[A]}{2})\times (3\times [B])^2$

$Rate=k\times (\frac{[A]}{2})\times 9\times [B]^2$

$Rate=k\times (\frac{9}{2})\times [A]\times [B]^2$

Given:

Initial rate = 0.0640 M/s

As, Initial rate = $k[A][B]^2$ = 0.0640 M/s

Thus,

$Rate=(\frac{9}{2})\times 0.0640M/s$

$Rate=0.288M/s$

Now we have to determine the initial rate when [A] is tripled and [B] is halved.

The new rate law expression will be:

$Rate=k\times (\frac{[B]}{2})^2\times (3\times [A])$

$Rate=k\times (\frac{[B]^2}{4})\times 3\times [A]$

$Rate=k\times (\frac{3}{4})\times [A]\times [B]^2$

Given:

Initial rate = 0.0640 M/s

As, Initial rate = $k[A][B]^2$ = 0.0640 M/s

Thus,

$Rate=(\frac{3}{4})\times 0.0640M/s$

$Rate=0.096M/s$

5 0

4 years ago

Please help! 50 points and Brainliest!

olga2289 [7]

Answer:

exothermic reaction

Explanation:

I think this because this is an example of an exothermic reaction is the chemical reaction between sodium and chlorine, which results in the formation of sodium chloride (also known as common salt)

8 0

3 years ago

Read 2 more answers

Which explains why many places on Earth experience four seasons each year rather than just

musickatia [10]

Answer:

d is the right one I think

7 0

3 years ago

How many moles of chlorine are used up in a reaction that produces 0.35kg of BCl3

maw [93]

4.48 mol Cl2. A reaction that produces 0.35 kg of BCl3 will use 4.48 mol of Cl2.

(a) The <em>balanced chemical equation </em>is

2B + 3Cl2 → 2BCl3

(b) Convert kilograms of BCl3 to moles of BCl3

MM: B = 10.81; Cl = 35.45; BCl3 = 117.16

Moles of BCl3 = 350 g BCl3 x (1 mol BCl3/117.16 g BCl3) = 2.987 mol BCl3

Moles of Cl2 = 2.987 mol BCl3 x (3 mol Cl2/2 mol BCl3) = 4.48 mol Cl2

4 0

3 years ago

1.) Calculation: If 9.02 x 1024 particles of vinegar (HC2H3O2)HC2H3O2) are added to 16.5 moles of eggshell (CaCO3) and 6.35 mole

blsea [12.9K]

The theoretical yield of acetate is 2607 g. The actual yield of acetate is 1066.8 g. The percentage yield of acetate is 41%.

If 1 mole of vinegar contains 6.02 x 10^23 particles

x moles of vinegar contains 9.02 x 10^24 particles

x = 1 mole x 9.02 x 10^24 /6.02 x 10^23

x = 15 moles of vinegar

The reaction is as follows;

2HC2H3O2 + CaCO3 -----> Ca(C2H3O2)2 + H2O + CO2

Since 2 moles of vinegar reacts with 1 mole of carbonate

x moles of vinegar reacts with 16.5 moles of carbonate

x = 2 moles x 16.5 moles/ 1 mole

x = 33 moles of vinegar

We can see that the vinegar is the reactant in excess hence the carbonate is the limiting reactant.

Theoretical yield = 16.5 moles x 158 g/mol = 2607 g

Actual yield = 6.35 moles x 158 g/mol = 1066.8 g

Percent yield = 1066.8 g/2607 g × 100/1

= 41%

Learn more: brainly.com/question/13440572?

7 0

3 years ago