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Romashka [77]
3 years ago
9

Using the reaction: Mg + O2 --> Mgo,

Chemistry
1 answer:
blondinia [14]3 years ago
6 0

Answer:

2Mg +O2 -----》 2MgO

the balanced equation

if you start with 2g of Mg let's calculate moles

one mole of mg id 24.30 g

so number of moles =0.08

hence 2 moles of Mg reacts with 1 mole of O2 molecule

so Moles of O2 molecule is 0.04

and mass of O2 in gm is = 16 ×0.04

which is equal to 0.64 gm

so the conclusion is if you start with 2g Mg, you need 0.64 grams of

O2 molecules for this reaction to go to

completion!!

i d k it's right or wrong but i tried my best :)

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What is the empirical formula of a compound that is made of 3.80g of phosphorus and 0.371g of hydrogen?
lys-0071 [83]

You start by diving each quantity given by the atomic wight of each element:

Phosphorus (P)   \frac{3.8}{31} =0.123

Hydrogen (H)   \frac{0.371}{1} =0.371

Then you divide by the lowest number:

\frac{0.123}{0.123} = 1 for phosphorus

\frac{0.371}{0.123} = 3 for hydrogen

So the empirical formula will be:    

PH_{3}

6 0
3 years ago
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PilotLPTM [1.2K]

Answer:

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Explanation:

4 0
2 years ago
If 287 mL of a 1.6 M glucose solution is diluted to 412 mL , what is the molarity of the diluted solution
satela [25.4K]

Answer:

The answer to your question is 1.11 M

Explanation:

Data

volume 1 = 287 ml

concentration 1 = 1.6 M

volume 2= 412 ml

concentration 2 = ?

Formula

               Volume 1 x concentration 1 = Volume 2 x concentration 2

Solve for concentration 2

          concentration 2 = (volume 1 x concentration 1) / volume 2

Substitution

          concentration 2 = (287 x 1.6) / 412

Simplification

          concentration 2 = 459.2 / 412

Result

           concentration 2 = 1.11 M  

5 0
3 years ago
What is the transition element which despite its strength (rigidity), it is characterized by being ductile, and by its high resi
uranmaximum [27]

Titanium is ductile and has high resistance for heat despite its strength.

Titanium (Ti), is a  Group 4b chemical transition  element, it has a silvery gray appearance. Its characteristics are as follows

  • known as the strongest metal with high rigidity
  • low-corrosion resistance
  • low density
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Because of these features, Titanium is widely used in building  aircraft, missiles, and ships and also in the production  of  prosthetics.

5 0
3 years ago
At top, Image 1 shows 2 C's connected by 2 lines. Each C is connected by single lines to 2 H's. At bottom, two dots and 12 C's i
Nana76 [90]

Answer: c

Explanation: Trust me

6 0
2 years ago
Read 2 more answers
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