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Mashcka [7]
2 years ago
7

What type of pressure would you expect to find at the equator?

Chemistry
1 answer:
vesna_86 [32]2 years ago
6 0
Answer: low pressure

Explanation: Air at the equator is warmer and the air above expands, becomes less dense and rises
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Predict the mass of iron (III) sulfide produced when 3.0 g of iron filings react completely with 2.5 g of yellow sulfur solid, S
777dan777 [17]
1) Chemical equation

16Fe(s) + 3S8(s) ---> 8Fe2S3

2) Molar ratios:

16 mol Fe : 3 mole S8 : 8 mol Fe2S3

3) Convert masses in grams to number of moles

number of moles = mass in grams / molar mass

a) iron, Fe

mass = 3.0 g
atomic mass = 55.845 g/mol

=> number of moles of Fe = 3.0g / 55.845 g/mol = 0.0537 mol

b) Sulfur, S8

mass = 2.5 g
molar mass = 8*32.065 g/mol = 256.52 g/mol

=> number of moles of S8 = 2.5g / 256.52 g/mol = 0.009746 mol

4) Limiting reactant

Theoretical ratio                           actual ratio

16 mol Fe / 3 mol S8                 0.0537 mol Fe / 0.009746 mol S8

5.33                                               5.50

So, there is a little bit more Fe than the theoretical needed to react all the S8, which means the S8 is the limiting reactant.

5) Calculate the number of moles of iron (III) produced with 2.5 g (0.009746 moles) of S8

3moles S8 / 8 moles Fe2S3 = 0.009746 moles S8 / x

=> x = 0.009746 * 8 / 3 moles Fe2S3 = 0.026 moles Fe2S3

6) Convert 0.026 moles Fe2S3 into grams

mass in grams = number of moles * molar mass

molar mass of Fe2S3 = 207.9 g/mol

mass = 0.026 mol * 207.9 g/mol = 5.40 g

7) Answer: option D)




3 0
2 years ago
Read 2 more answers
What are the structural components of a triglyceride?
levacccp [35]
The structural components of a triglyceride is a molecule of glycerol and 3 fatty acids because one triglyceride is made up of glycerol that is made up of 3 different fatty acids.

Hope this helps!
3 0
3 years ago
How would you write 2,200 in picometers? Or would the number just be 2,200 picometers? PLEASE HELP!
Anestetic [448]
I believe your answer is 2200000000000000. I hope this can help you :)
6 0
3 years ago
Balance in basic solution: O2(g) + Cr³+ (aq) → H₂O2 (1) + Cr₂O7²- (aq)
likoan [24]

cr2o72+H2o2-(r3+o2)

Explanation:

r62o72+H2o2-(r3+o2)

3 0
3 years ago
Why LED is better option for testing the conduction of electricity?
Anettt [7]

Answer:

Led is a light-emitting diode, a semiconductor diode that glows when a voltage is applied. So, there is always a sure result of whether a substance conducts electricity or not as the light glows. That is why it is a better option for testing conduction of electricity.

Explanation:

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2 years ago
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