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levacccp [35]
3 years ago
5

Need help with this chemistry stoichiometry worksheet any help is appreciated with work shown!

Chemistry
1 answer:
Afina-wow [57]3 years ago
5 0

Answer:

I suggest you study. These can burn up time, so balance the stoichiometry,

Between Oxygen and Propane to yield carbon dioxide.

Aluminum is tricky; Al2O3 is the best choice, especially for the shorter time and what you can learn

Explanation:

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Please help, this assignment is to hard for me. :(
iren [92.7K]

Answer:

603000 J

Explanation:

The following data were obtained from the question:

Energy required (Q) =...?

Mass (M) = 10000 g

Specific heat capacity (C) = 2.01 J/g°C

Overheating temperature (T2) = 121°C

Working temperature (T1) = 91°C

Change in temperature (ΔT) =.?

Change in temperature (ΔT) =T2 – T1

Change in temperature (ΔT) = 121 – 91

Change in temperature (ΔT) = 30°C

Finally, we shall determine the energe required to overheat the car as follow:

Q = MCΔT

Q = 10000 × 2.01 × 30

Q = 603000 J

Therefore, 603000 J of energy is required to overheat the car.

7 0
2 years ago
What is the molarity of the Ca(OH)2 solution if 32.00 mL of Ca(OH)2 requires 16.08 mL of a 2.303 M solution for complete titrati
amm1812

Answer:

For this problem we just need to remember the equation and that the volume is always in liters: MaVa=MbVb

  Ma= 1.338 mol/L Va= 18.75 mL= 0.01875 L Mb= x Vb=24.73 mL= 0.02473 L

 

  So now we can plug into the equation and solve:

   1.338 mol/L * 0.01875 L= x mol/L * 0.02473 L

This is a two step process: stoichiometry and using the answer from the first part to plug and chug it into the Molariy equation.

  First step: setup the stoichiometry problem:

  3.1171 g Na2CO3 * (1 mol/106 g) * (2 mol HCl/ 1 mol Na2CO3)= mol HCl

 

  Second step: Molarity equation

  Molarity= moles HCl/ L   M= mol HCl/0.04027 L

For the third problem, you will just use the same equation as the first: MaVa= MbVb

  Ma=0.57 M   Va= x L   Mb= 0.875 M  Vb= 23.83 mL= 0.02383 L

  0.57 M * x L= 0.875 M * 0.02383 L

With this equation, we want to find the moles of NaOH by using the molarity equation first then because MaVa= MbVb, we know that the number of moles has to be equal.

   0.75 M= x mol/ 0.0227 L    mol NaOH = 0.75 M *0.0227 L         mol NaOH= 0.017025

  So next, we can set it to the mass of the acid using this equation: Molar Mass= mass/ moles

  Molar Mass= 3.6 g/ 0.017025 mol  

 And with that you will find the molar mass of HX, and even determine what X is.

Explanation:

hope I helped

8 0
2 years ago
Iodine-131 is a radioactive isotope with a half-life of 8 days. how many grams of a 64 g sample of iodine-131 will remain at the
icang [17]
At the end of 24 days, there will only be 16 g.
7 0
2 years ago
Can you think of another way the Egyptians might have tried to reduce friction to move the heavy blocks?
quester [9]
There are different techniques to reduce friction, similar to 1. Cleaning the surfaces 2. Including lubricants 3. expanding the temperature 4. wetting the surface 5. expelling polluting influences. Egyptian could have moved the square through water, which would be Fluid Friction, and makes it less demanding to move.
8 0
3 years ago
Read 2 more answers
According to the law of conservation of energy, the total amount of energy in the universe is Question 24 options: increasing de
GalinKa [24]
<h3><u>Answer;</u></h3>

Constant

<h3><u>Explanation;</u></h3>
  • According to the law of conservation of energy, the total amount of energy in the universe is constant.
  • The law of Conservation of Energy states that Energy cannot be created or destroyed. The total amount of energy in the universe never changes, although it may change from one form to another.
  • Energy never disappears, but it does change from one form to another. For example; when we eat our food has stored energy in it.
7 0
3 years ago
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