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
steposvetlana [31]
3 years ago
11

List four observation that suggest a chemical change is occuring

Chemistry
1 answer:
andrezito [222]3 years ago
8 0
1.) Gas given off
2.) precipitate formed
3.) large amount of heat given off
4.) Color change
You might be interested in
I need a Help plz! It’s my final exam!
LekaFEV [45]
Um i think gold... i think?
7 0
2 years ago
Calculate the solubility of Mg(OH)2 in water at 25 C. You'll find Ksp data in the ALEKS Data tab. Round your answer to significa
elena-s [515]

Answer:

1.12 × 10⁻⁴ M

Explanation:

Step 1: Write the reaction for the solution of Mg(OH)₂

Mg(OH)₂(s) ⇄ Mg²⁺(aq) + 2 OH⁻(aq)

Step 2: Make an ICE chart

We can relate the solubility product constant (Ksp) with the solubility (S) through an ICE chart.

       Mg(OH)₂(s) ⇄ Mg²⁺(aq) + 2 OH⁻(aq)

I                                0                    0

C                              +S                +2S

E                                S                  2S

The solubility product constant is:

Ksp = 5.61 × 10⁻¹² = [Mg²⁺] × [OH⁻]² = S × (2S)² = 4S³

S = 1.12 × 10⁻⁴ M

8 0
3 years ago
What might happen if you got too close to the center of the Milky Way galaxy?
Lady_Fox [76]

Answer:

you would be trapped in the gravitational pull of a black hole

Explanation:

there is a black hole in the center of the galacy

5 0
3 years ago
Solve the following equation (y = 1.2345x – 0.6789) for x, given that y = 0.570
Andrews [41]

x = 1.01

Explanation:

Given equation:

   y = 1.2345x – 0.6789

   y = 0.570

Problem:

Solving for x

The variables in this equation are y and x

They can take up any value since they are variables.

  Since we have been given y = 0.570

        y = 1.2345x – 0.6789

To solve for x, we simply substitute for y in the equation;

     since  y = 0.570

     0.57 = 1.2345x – 0.6789

    add 0.6789 to both sides;

 0.57 + 0.6789 =  1.2345x – 0.6789 + 0.6789

  1.2489‬ =   1.2345x

Divide both sides by  1.2345

 \frac{1.2489}{  1.2345} = \frac{  1.2345x }{ 1.2345}

    x = 1.01

learn more:

Equations brainly.com/question/9045597

#learnwithBrainly

 

7 0
3 years ago
Which of the following contains properties of magnesium, Mg?
tekilochka [14]

Answer:

Option B. Malleable, Conductor, High melting point, Lustrous

Explanation:

Mg has a higher melting point because of the strong electrostatic force of attraction between the magnesium ions (Mg^2+). The rest properties listed are all general properties of metals

6 0
3 years ago
Other questions:
  • How many protons are in an ion with 36 electrons and a –1 charge?
    9·1 answer
  • What force causes water to run down a mountain ?
    7·1 answer
  • All the molecules of a substance possess the "average kinetic energy" value.
    12·1 answer
  • The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic attraction holding that compound
    6·1 answer
  • The synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down the
    12·1 answer
  • This is for Balancing Equations <br> What is H2 + F2 → HF
    6·1 answer
  • *WILL MARK BRAINLIEST!<br> Why is it difficult for us to use fusion reactions to produce energy?
    7·1 answer
  • (Forensics)Quick!! Can someone write me a story on a blood spatter crime scene i can use? Story needs to be descriptive &amp; co
    5·1 answer
  • Which of the following best describes an atom?
    15·1 answer
  • Divers who go to great depths in the ocean experience large differences in pressure between the surface and their final destinat
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!