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
DENIUS [597]
3 years ago
8

Which one of these is NOT a sign of chemical change? *

Chemistry
1 answer:
Gekata [30.6K]3 years ago
3 0
I think it’s light
Have fun :)
You might be interested in
Describing Rock Texture
Klio2033 [76]
The name "flint" is often the preferred name used for material with a very fine grain size and a slightly higher luster. These "fine-grained" materials break with greater predictability and produce a sharper edge. So the middle answer
6 0
2 years ago
The domain level divides
White raven [17]

Answer:

B. Prokaryotes do NOT have a nucleus.

7 0
3 years ago
100 POINTS! HELP ME IF YOU LOVE JESUS!
mr Goodwill [35]
I only got 50 points (which is not 100). :-)

Look at the graph. At 80 °C, about 38 g of solute is able to dissolve, and that’s for ever 100 g of water. That means that for every 150 grams of water, 57 grams of solute can dissolve (38/2 = 19 + 38 = 57 g) at 80 °C. Since 57 g is greater than 55 g, all for he sodium chloride should dissolve in 150 g of water at 80 °C - you can put all of that into a “mathematical explanation”.
4 0
2 years ago
0.352 g sample of a diprotic acid is dissolved in water and titrated with 0.150 M NaOH.0.150 M NaOH. What is the molar mass of t
Aliun [14]
<h3>Answer:</h3>

128.94 g/mol

<h3>Explanation:</h3>

Given;

Mass of diprotic acid, H₂X =0.352 g

Molarity of NaOH = 0.150 M

Volume of the NaOH = 36.4 mL

We are required to calculate the molar mass of the acid.

Note: A diprotic acid is an acid that contains 2 replaceable hydrogen atoms

<h3>Step 1: Write the balanced equation fro the reaction;</h3>

The balanced equation for the reaction between the diprotic acid and NaOH will be;

H₂X(aq) + 2NaOH(aq) → Na₂X(aq) + 2H₂O(l)

<h3>Step 2: Determine the number of moles of NaOH used </h3>

Given the molarity and volume of NaOH we can calculate the number of moles;

Moles of NaOH = Molarity × Volume

                          = 0.150 M × 0.0364 L

                         = 0.00546 moles

<h3>Step 3: Use the mole ratio to determine moles of the acid </h3>

From the equation;

1 mole of the acid reacts with 2 moles of NaOH

Therefore; H₂x : NaOH = 1 : 2

Moles of H₂x = 0.00546 moles ÷ 2

                      = 0.00273 moles

<h3>Step 4: Determine the molar mass of the acid.</h3>

Molar mass is the mass equivalent to 1 mole of a compound or element

From our calculations;

0.00273 moles = 0.352 g of the acid;

Therefore, mass in 1 mole ;

= 0.352 g ÷ 0.00273 moles

= 128.94 g/mol

Thus, the molar mass of the diprotic, H₂X is 128.94 g/mol

7 0
3 years ago
White light, which consists of all frequencies, forms which type of spectrum?
malfutka [58]
Visible light spectrum.

The visible light spectrum is part of the electromagnetic radiation spectrum
5 0
3 years ago
Other questions:
  • Which of these would DECREASE the solubility of a solid in water?
    7·1 answer
  • ___in Earth’s___ is the up and down movements of plastic-like material within that layer.
    14·1 answer
  • C. in the reaction of copper and silver nitrate, a new substance appeared in the test tube. describe the physical appearance of
    6·1 answer
  • What does the law of increasing costs say?
    6·1 answer
  • A mixture of 0.220 moles CO, 0.350 moles H2 and 0.640 moles He has a total
    5·1 answer
  • Based on the diagram above, nitromethane has a chemical formula of CH
    7·1 answer
  • Both the sweatshirt and the balloon are negatively charged. They are most
    6·1 answer
  • heeeeelp what type of reaction is shown below? Fe+ Ci2= FeCi3 (i need and explination of how i got the answer) heelp pleass
    14·1 answer
  • 4. The speed of a wave is 75m/s. If the wavelength of the wave is 5m, what is the frequency of the
    15·2 answers
  • PLEASE HELP! I'LL GIVE YOU BRAINLIEST!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!