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
makvit [3.9K]
3 years ago
10

What happens when a piece of Mg ribbon is burnt? Name the

Chemistry
1 answer:
algol133 years ago
7 0

Answer:

When a Magnesium Ribbon is burnt, a powdery substance called magnesium oxide is formed.

Explanation:

There has obviously been a chemical change because several chemical properties of the magnesium have been modified:  the color, the texture and the mass.

The increase in mass is due to the fact that oxygen from the air has combined with the magnesium to make magnesium oxide, MgO.

The chemical equation, Mg + O2  MgO shows this reaction but it needs to be balanced to make 2Mg + O2  2MgO.  

Using stoichiometry, we can convert this eqation into an equation with moles:  

2 mol Mg + 1 mol O2  2 mol MgO.  

Next, we convert to grams using atomic masses obtained from the periodic table:

48g Mg + 32g O2  80g MgO

Lastly, we determine the same thing in the proportions we used.  In other words, we used only 0.15g of Mg (not 48g) so everything needs to be divided by 320.  So 80 / 320 = 0.25 g.  If we burn 0.15 g of Mg, we obtain 0.25 g of MgO.

Hope this helps!!!

This is my first answer.

You might be interested in
A fusion reaction takes place between carbon and another element neutrons are released and a different element is formed the dif
Andreas93 [3]

A fusion reaction takes place between carbon and another element. Neutrons are released, and a different element is formed. The different element is Lighter than helium.

7 0
3 years ago
15 points + brainliest pls help :(
Komok [63]

Answer:

27 g

Explanation:

M(C6H12O6) = 6*12 + 12*1 + 6*16 = 180 g/mol

100 mL = 0.1 L solution

1.5 M = 1.5 mol/L

1.5 mol/L * 0.1 L = 0.15 mol  C6H12O6

0.15 mol * 180 g/1 mol = 27 g C6H12O6

6 0
3 years ago
Which statement best describes a typical difference that could be found between the "Analysis" and "Conclusion" sections of a
IgorC [24]

The statement “Only the “Conclusion” section discusses whether the original hypothesis was supported, and both sections suggest further  research”, best describes the difference between analysis and conclusion.

Answer: Option 4

<u>Explanation: </u>

In research, we do experiments and derive the results. Then, those results were analyzed by us. In this analysis part, we compare our results with the related results published elsewhere. Also, we correlate the similarities and point out the differences between our analysis and other reported results.

In conclusion part, we have to check hypothesis or it supported. And, we summarise our analysis and figure out the further research need to be done on that to improvise our research. So, the final statement is the correct option which best describes the difference between analysis and conclusion.

3 0
3 years ago
Before the work of Albert Einstein and other prominent scientists of the early 1900's, the predominant view among
Ivanshal [37]
A wave.

Scientists now recognize that light can behave as both a particle and a wave.
3 0
3 years ago
HELPP 20+ POINTS!!!
VashaNatasha [74]
The answer is •c•
Hope this is correct I tried
6 0
3 years ago
Other questions:
  • A student ran the following reaction in the laboratory at 242 K: 2NOBr(g) 2NO(g) Br2(g) When she introduced 0.143 moles of NOBr(
    5·1 answer
  • 2. What does the diamond-shaped symbol stand for in a consumer product label?
    9·1 answer
  • Calculate the pH of each solution at 25∘C
    8·1 answer
  • A(n)____ is a negatively-charged subatomic particle.<br> Help plz I need this before tmr morning
    11·1 answer
  • What is behavioral adaption
    10·2 answers
  • How many liters of oxygen are required to react completely with 1.2 liters of hydrogen to form water? 2H2(g) + O2(g) → 2H2(g)
    15·1 answer
  • Which of these is not a property of minerals?
    5·1 answer
  • _______ is a physical property
    10·2 answers
  • How many neutrons are present in 1 atom of chlorine?
    8·2 answers
  • Help me Please! I don’t understand it
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!