1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zarrin [17]
3 years ago
5

A substance which contains various elements or compounds without bonding or in fixed proportions is a(n) _____.

Chemistry
1 answer:
julia-pushkina [17]3 years ago
5 0
The correct answer that would best complete the given statement above would be the word MIXTURE. <span>A substance which contains various elements or compounds without bonding or in fixed proportions is a mixture. When a chemical union occurs, this is when a compound is being formed. Hope this answer helps.</span>
You might be interested in
What is the difference between electron configuration and valence electron configuration?
Ratling [72]
Valence election configuration is the electrons in the shell that equal to 8. it what forms chemcial bonds. Electron configuration is distribution of elections of an atom. 
8 0
3 years ago
The carbon-carbon (C―C) bond has an average bond energy of 347 kJ/mol, which is the energy required to break one mole of C―C bon
olganol [36]

Answer:

(3) 345 nm

Explanation:

<u>Given:</u>

Average C-C bond energy = 347 kJ/mol

<u>To determine:</u>

Wavelength of photon that can break a C-C bond

<u>Calculation:</u>

The energy (E) of a photon is related to its wavelength (λ) by the Planck's equation:

E = \frac{hc}{\lambda }

where h = Planck's constant = 6.626*10⁻³⁴ Js

c = speed of light = 3*10⁸ m/s

\lambda = \frac{hc}{E}

\lambda =\frac{6.626*10^{-34}Js*3*10^{8}ms^{-1}*6.023*10^{23}mol^{-1}}{347,000Jmol^{-1}}

λ = 3.45*10⁻⁷ m

Since 1 nanometer (nm) = 10⁻⁹ m

The calculated wavelength corresponds to 345 nm

6 0
4 years ago
What color is the 2,6-dichloroindophenol solution in acidic solutions?
ICE Princess25 [194]
DCPIP is a redox dye that starts off blue but will turn reddish-pink in acidic solution.

This chemical is often used in general chemistry experiments with vitamin C (ascorbic acid), which is a good reducing agent. The DCPIP become colorless when it is reduced (remember, it's blue when oxidized).
7 0
3 years ago
How much did the total amount of discarded clothing and other fabrics increase from 1960
In-s [12.5K]

Answer:

Around 17,000,000 or a little more than that

4 0
3 years ago
Calculate [H3O+] and [OH−] for each of the following solutions at 25 ∘C given the pH. pH= 8.74, pH= 11.38, pH= 2.81
Gnom [1K]

Answer:

Explanation:

Given parameters;

pH  = 8.74

pH = 11.38

pH = 2.81

Unknown:

concentration of hydrogen ion and hydroxyl ion for each solution = ?

Solution

The pH of any solution is a convenient scale for measuring the hydrogen ion concentration of any solution.

It is graduated from 1 to 14

      pH = -log[H₃O⁺]

      pOH = -log[OH⁻]

 pH + pOH = 14

Now let us solve;

   pH = 8.74

             since  pH = -log[H₃O⁺]

                           8.74 =  -log[H₃O⁺]

                           [H₃O⁺] = 10⁻^{8.74}

                             [H₃O⁺]  = 1.82 x 10⁻⁹mol dm³

       pH + pOH = 14

                 pOH = 14 - 8.74

                  pOH = 5.26

                  pOH = -log[OH⁻]

                     5.26  = -log[OH⁻]

                     [OH⁻] = 10^{-5.26}

                      [OH⁻] = 5.5 x 10⁻⁶mol dm³

2.  pH = 11.38

             since  pH = -log[H₃O⁺]

                           11.38 =  -log[H₃O⁺]

                           [H₃O⁺] = 10⁻^{11.38}

                             [H₃O⁺]  = 4.17 x 10⁻¹² mol dm³

           pH + pOH = 14

                 pOH = 14 - 11.38

                  pOH = 2.62

                  pOH = -log[OH⁻]

                     2.62  = -log[OH⁻]

                     [OH⁻] = 10^{-2.62}

                      [OH⁻] =2.4 x 10⁻³mol dm³

3. pH = 2.81

             since  pH = -log[H₃O⁺]

                           2.81 =  -log[H₃O⁺]

                           [H₃O⁺] = 10⁻^{2.81}

                             [H₃O⁺]  = 1.55 x 10⁻³ mol dm³

           pH + pOH = 14

                 pOH = 14 - 2.81

                  pOH = 11.19

                  pOH = -log[OH⁻]

                     11.19  = -log[OH⁻]

                     [OH⁻] = 10^{-11.19}

                      [OH⁻] =6.46 x 10⁻¹²mol dm³

5 0
3 years ago
Other questions:
  • Give the number of significant figures indicated.<br><br> 6.695
    9·1 answer
  • HELP: Nitrogen has two isotopes, N-14 and N-15, with atomic masses of 14.00031 amu and 15.001 amu, respectively. What is the per
    12·1 answer
  • Which compound is an exception to the octet rule?
    10·2 answers
  • Low ionization energies are most characteristic of atoms that are
    5·2 answers
  • Juliette uses 20 N to move her desk 5 meters. Which of the following is true?
    13·2 answers
  • Classify each of the following chemical reaction (check all that apply) :
    5·1 answer
  • Warm Up
    12·2 answers
  • Which of the following statements best represents a comparison of the two motions shown on the graphe
    7·1 answer
  • which behavior is a innate adaptation a.hunting in packs b.fighting for portection .c mating d. all behaviors are innate
    11·1 answer
  • Lab: Half-Life Claim, Evidence, Reasoning: Lab Prompt Write 3 total sentences establishing your claim, giving your evidence from
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!