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
Igoryamba
4 years ago
5

A student is in the lab and combines two unknown substances ( which you should never do because it is not safe). one is a white

solid, and the other one is clear liquid. after the substances are mixed, you observe...
1- bubbles forming,
2- dementia turns a dark purple color, and
3-the white solid substance dissolves into the liquid.



did a physical change or a chemical change happen? which of the observation would you use as evidence in why? ​
Chemistry
1 answer:
dem82 [27]4 years ago
7 0

Answer:

Chemical change

Explanation:

If you were to mix two unknown substances and a reaction as such was to happen it would most likely be a Chemical change as it had a reaction with the other substance and created a chemical reaction.

Sorry for any spelling errors English is my second language.

You might be interested in
The p sub shell can hold up to 8 electrons in an atom. true or false?
MakcuM [25]
The p sub cell can hold up to 8 atoms. So true
6 0
4 years ago
Read 2 more answers
What is the chemical formula for deionized water?
Shalnov [3]

Answer:

Formula: H2O Formula Weight: 18.02 CAS No.: 7732-18-5 Density: 1.000 g/mL at 3.98 °C(lit.)

Explanation:

7 0
4 years ago
2H2 + O2 ---> 2H2O
ohaa [14]
2 H2 + O2 ----------- 2 H2O

2 mol H2 ----------- 1 mol O2
27.4 mol H2- ------ x mol O2

2x  = 27.4

x = 27.4 / 2

x = 13.7 moles O2

answer b

hope this helps!.
7 0
3 years ago
Help answer the questions in the photo above
DanielleElmas [232]

Let the person at the Left be A and Person at the right be B

then the force by person A will be

Pulling force + Frictional Force = the force by the person

which is,

20N+11N=29N

then the force by person B will be,

25N+5N=30N

1) the net force will be 30N-29N=1N

2) the force are unbalanced as the net force acting on the object is not zero.

3) the rope will move towards the right as there is a net force of 1N towards the right.

5 0
3 years ago
Read 2 more answers
What is the oxidation number of sulfur in BaSO4?
____ [38]

Answer:

+6

Explanation:

We are given;

  • Compound BaSO₄

We are required to determine the oxidation number of S in the compound.

We need to know that;

  • The total oxidation number of this compound is Zero
  • Oxidation number of Ba metal is +2
  • Oxidation number of Oxygen atom is -2
  • There is 1 atom of Ba, 1 atom of S and 4 atoms of O in the compound.

Therefore; assuming oxidation number of S is x

Then, (1× 2) + (1 × x) + ( 4 ×(-2)) = 0

2 + x - 8 = 0

x = 6 or +6

Thus oxidation number of Sulfur in BaSO₄ is +6.

7 0
3 years ago
Other questions:
  • In 1939, at the age of 20, a man stood 270 cm tall (over 8 1/2 feet) and wore size 37 shoes! The hormonal disorder from which he
    14·1 answer
  • Covalent bond results when fluorine bonds with: fluorine, hydrogen, iodine, potassium
    15·1 answer
  • NEED HELP AS SOON AS POSSIBLE!
    6·1 answer
  • Is opposite poles repel each other why does the north end pf a compass point to the north pole
    14·1 answer
  • Why the measured pressure of a gas under conditions that are very close to those that would result in condensation will be lower
    5·1 answer
  • What mass of ni2+ is produced in solution by passing a current of 67.0 a for a period of 12.0 h , assuming the cell is 90.0 % ef
    14·1 answer
  • 1) How many moles of atoms are in 3.00 g of 13C?2) Based on your answer in Part B, how many electrons are in this amount of 13C?
    10·1 answer
  • Is anyone good at chemistry if so can someone please help me NO LINKS PLEASE
    10·1 answer
  • <
    13·1 answer
  • What is a neutralization reaction?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!