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]
2 years ago
10

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

Chemistry
1 answer:
algol132 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
Which is the safest method for diluting concentrated sulfuric acid with water?
Anton [14]

The safest method for diluting concentrated sulfuric acid with water is to add acid to water. This way, when spill occurs, the acid is already diluted and less harmful than adding water to acid.

3 0
3 years ago
Me without you is like a nerd without braces, A shoe without laces, aSentenceWithoutSpaces.
Nataly [62]

Answer:

LOL

Explanation:

3 0
3 years ago
2 Cu + Cl2 ----> 2 Cuci
s344n2d4d5 [400]

Answer:

320 g.

Explanation:

Hello!

In this case, according to the balanced chemical reaction, we can compute the grams of copper I chloride produced by each reactant, as shown below:

m_{CuCl}^{by\ Cu}=3.23molCu*\frac{2molCuCl}{2molCu}*\frac{99.0gCuCl}{1molCuCl}  =320gCuCl\\\\m_{CuCl}^{by\ Cl_2}=1.64molCl_2*\frac{2molCuCl}{1molCl_2}*\frac{99.0gCuCl}{1molCuCl}  =325gCuCl

Thus, since copper produces the fewest grams of CuCl, we infer it is the limiting reactant, therefore the correct mass of copper I chloride is 320 g.

Best regards!

4 0
3 years ago
How many liters of fat would have to be removed to result in a 5.2 lb weight loss? The density of human fat is 0.94 g/mL?​
aksik [14]
I don’t even know I’m just answering for pints
7 0
2 years ago
Which is the best method for organizing information collected in an investigation? Plz help
Elden [556K]
Construct a table i think
7 0
3 years ago
Read 2 more answers
Other questions:
  • A calorimeter contains 32.0 mLmL of water at 15.0 ∘C∘C . When 1.20 gg of XX (a substance with a molar mass of 54.0 g/molg/mol )
    9·1 answer
  • It’s easier to determine the elecron configurations for the p-block elements in periods 1,2,3 than to determine the electrons co
    6·2 answers
  • How much heat is required to evaporate a gram of water at room temperature?
    5·1 answer
  • The warming of the thermosphere (the upper level of the atmosphere) is caused by the photo absorption of high energy photons. On
    10·1 answer
  • Which of these compounds would you expect to be most soluble in water? ch3ch2ch2f ch3ch2ch2oh ch3ch2ch2ch3 ch3ch2cl description?
    5·1 answer
  • Which SI units can be used to describe an object’s volume?
    15·1 answer
  • Enter your answer in the provided box. To draw a Lewis structure, first add the number of outer (valence) electrons contributed
    10·1 answer
  • Which ball has the most energy?
    5·2 answers
  • The elemental composition of a compound is determined to be 39.5% oxygen, 32.1% chromium and 28.4% sodium by weight.
    10·1 answer
  • A sample of crude sodium iodide was analysed by the following rection.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!