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
Galina-37 [17]
3 years ago
13

Some students observe four different lab investigations. The students record their observations in a table.

Chemistry
2 answers:
Sati [7]3 years ago
3 0

Answer:

Number 4 is an example of a chemical reaction

Explanation:

heThe chalk is reacting with the vingear which is creating a new substance. The new substance is the gas that the reaction gives off.

ollegr [7]3 years ago
3 0
I think the number 4 is the right answer
You might be interested in
52. A proton is a subatomic particle that has a
kondaur [170]

Answer:

positive charge

Explanation:

Protons are positively charged

3 0
3 years ago
How to unscramble dtneinreigs
torisob [31]
ANSWER: Ingredients.
3 0
3 years ago
Read 2 more answers
How does body temperature, energy level, and water level affect a person’s ability to survive?
kifflom [539]
U won’t get hyperthermia or a heat stroke when ur hot u use up more energy but when ur cold u use up less
4 0
3 years ago
The table shows the total number of electrons in Atom A and Atom B. Atom Number of Electrons A 10 B 18 Which statement is correc
HACTEHA [7]

Answer:

Both A and B will be unreactive!

Explanation:

10=2, 8

18=2, 8, 8

4 0
3 years ago
Read 2 more answers
How could measuring the melting point of a solid help decide whether it was a mixture or a compound?
mars1129 [50]

Answer: It can't.

Explanation:

In most cases, the melting point alone will not enable you to identify a compound. Millions of solid organic compounds, and their melting points, are known. Perhaps 10,000 of these will have the same melting point as your unknown compound.

Hope this helps!

8 0
3 years ago
Other questions:
  • 6. (2 Points) Suppose 50.0 mL of 0.350 M lithium hydroxide is mixed with 30.0 mL of 0.250 M perchloric acid. What is the pH of t
    5·1 answer
  • 1.
    7·2 answers
  • Solid-solid homogeneous mixture give one example
    7·2 answers
  • What is the coordination number for each of the following complexes or compounds? [Co(NH3)4(H2O)2]3+ [Cr(EDTA)]− [Pt(NH3)4]2+ Na
    7·1 answer
  • Can i have help? with 1-7?
    5·2 answers
  • I don't understand the question
    10·2 answers
  • A section of this DNA molecule that codes for a specific inherited trait is called a......
    6·1 answer
  • A- south<br> B- north <br> C-west<br> D- east <br> Help ASAP no links or I’m reporting
    9·1 answer
  • How many grams of calcium chloride would be dissolved in 1.0L of a 0.10m solution of calcium chloride?
    7·1 answer
  • What is co-wolent bond?<br><br>​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!