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marta [7]
3 years ago
5

Which of the following covalent bonds is the most polar?

Chemistry
1 answer:
erma4kov [3.2K]3 years ago
8 0

Answer:

H-F bonds are the strongest.

As Fluorine is the most electronegative element.

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A student melts 50.0 grams of ice using 16650 J of energy. What is the heat of fusion of ice?
Shkiper50 [21]
Heat fusion is the amount of energy required to convert one mole of ice into water, 16650J is per 50g so if we divide 16650 by 50 we find it per gram: 16650/50 = 333J/g or 0.33KJ/g

hope that helps :)
6 0
3 years ago
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How many atoms are in 0.750 moles of zinc?
motikmotik
(doesn't really matter that it's zinc :) )
It is 0.75*N_A, where N_A=6.023*10^{23} (in some books 6.022).
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What is the symbol for the isotope of 58co that possesses 33 neutrons?
Cerrena [4.2K]

Cobalt because it has an atomic mass of 58 and 33 neutrons.

3 0
3 years ago
How can litmus paper and phenolphthalein be used to tell whether a solution is an acid or a base? Be specific.
MArishka [77]
Both litmus paper and phenolphthalein are used as acid/base (pH) indicators.

Litmus paper:
Litmus paper will turn either blue or red when a drop of solution is added to the paper. Red indicates an acidic solution (pH is <4.5), and blue indicates a basic solution (pH >8.3).

Phenolphthalein:
Phenolphthalein is commonly used during acid/base titrations. When the solution is acidic and the indicator is added, it will remain colorless. If the solution is basic, the phenolphthalein will turn pink.
6 0
3 years ago
Balance 6Sb +6Cl2– 6SbCl3
labwork [276]

<u>Answer:</u>

<u>Balancin</u>g is making the number of atoms of each element same on both the sides  (reactant and product side).

To find the number of atoms of each element we multiply coefficient and the subscript  

For example 5 Ca_1 Cl_2 contains

5 × 1 = 5,Ca atoms and

5 × 2 = 10, Cl atoms

If there is a bracket in the chemical formula

For example 3Ca_3 (P_1 O_4 )_2 we multiply coefficient \times subscript \times number outside the bracket.......... to find the number of atoms  

(Please note: 3 is the coefficient, and if there is no number given then 1 will be the coefficient )

So

3 × 3 = 9, Ca atoms  

3 × 1 × 2 = 6, P atoms  

3 × 4 × 2 = 24, O atoms are present.

So

Let us balance the equation given

1Sb +1Cl_2 > 1SbCl_3

(Unbalanced)

Reactant side - Number of atoms of each element - Product side

1  - Sb - 1

2 - Cl - 3  

So we have on the product side odd number of Cl to convert to even number, multiply SbCl_3 by 2

The equation changes to

1Sb +1Cl_2> 2SbCl_3

Reactant side - Number of atoms of each element - Product side

1  - Sb - 2

2 - Cl - 6

Multiplying Sb by 2 and Cl_2

2Sb +3Cl_2> 2SbCl_3

The equation is balanced now!!!!  

Reactant side - Number of atoms of each element - Product side

2  - Sb - 2

6 - Cl - 6

Balanced.

4 0
3 years ago
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