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
Musya8 [376]
2 years ago
12

7. Which of the following changes could be associated with either a chemical change OR a

Chemistry
1 answer:
Elan Coil [88]2 years ago
5 0

Answer:

a: chemical change because the change cannot be reversed.

b: physical change because the action can be reversed.

c: chemical change.

d:chemical change.

any change that cannot be reversed is a chemical change and any change that can be reversed is a physical change.

You might be interested in
How many moles of helium are 8.84×10^24 atoms of He?
viva [34]

Answer:

14.77 mol.

Explanation:

  • It is known that every 1.0 mole of compound or element contains Avogadro's number (6.022 x 10²³) of molecules or atoms.

<u><em>Using cross multiplication:</em></u>

1.0 mole of He contains → 6.022 x 10²³ atoms.

??? mole of He contains → 8.84 x 10²⁴ atoms.

<em>∴ The no. of moles of He contains (8.84 x 10²⁴ atoms) </em>= (1.0 mol)(8.84 x 10²⁴ atoms)/(6.022 x 10²³ atoms) =<em> 14.77 mol.</em>

8 0
3 years ago
Which of the following is in French
geniusboy [140]

Answer:

A dog barks

Explanation:

7 0
3 years ago
Read 2 more answers
Can somebody help me please!!
wlad13 [49]

Answer: velocity

Explanation: trust me man

3 0
3 years ago
Read 2 more answers
A chemist forms 16.6 g of potassium iodide by combining 3.9 g of potassium with 12.7 g of iodine. Show that these results are co
bezimeni [28]
3.9 g + 12.7 g = 16.6 g

The sum of the masses of potassium and iodine equals the mass of the product, potassium iodide. The results are consistent with he law of conservation of mass.


Hope this heeeelllllllpppppppp
3 0
3 years ago
50 Points: What is the mass of 6.12 moles of arsenic (As)?
ozzi

The mass of 6.12 moles of arsenic (As) is calculated to be approximately 459g.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by multiplying the number of moles of a substance by its molar mass. That is;

Mass of Arsenic = no. of moles of As × molar mass of As.

According to this question, 6.12 moles of arsenic was given and its molar mass is 74.92g/mol.

Mass of As = 6.12 mol × 74.92g/mol

Mass of As = 459g

Therefore, the mass of 6.12 moles of arsenic (As) is calculated to be approximately 459g.

Learn more about mass calculations at: brainly.com/question/8101390

4 0
2 years ago
Other questions:
  • There are many different types of maps a map that shows the types of rocks or the age of rocks in an area is called a
    5·1 answer
  • Suggest a pH value for lemonade
    13·1 answer
  • In a titration experiment, how many moles of naoh will be required to completely neutralize 1 mole of nitric acid?
    7·2 answers
  • Name two landforms created from deposits by rivers.
    8·1 answer
  • Explain what lattice energy is and how it affects
    9·1 answer
  • Hi no Link please
    10·1 answer
  • Which formula can be used to calculate the percent yield?
    7·2 answers
  • A heterogeneous material may be
    7·2 answers
  • What is 1+1=?and what is 2+2=?
    5·2 answers
  • Hey chemist tests new measures for paint samples and decides to one mixture stickiness makes it worthless. A scientist working i
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!