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Debora [2.8K]
2 years ago
13

PLEASE HELP ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
2 answers:
iogann1982 [59]2 years ago
8 0

2. is point source

3. is non point source

storchak [24]2 years ago
4 0
QUESTION 2: POINT SOURCE
QUESTION 3:NONE POINT SOURCE
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Identify the combustion reaction. c4h12 + 7o2 ⟶ 6h2o + 4co2 2h2 + o2 ⟶ 2h2o al2s3 ⟶ 2al + 3s cl2 + 2kbr ⟶ 2kcl + br2
Levart [38]
From the given equations, the combustion reaction is;
C₄H₁₂ + 7O₂ --> 4CO₂ + 6H₂O
Combustion reactions are when organic compounds react with O₂ to produce water and CO₂. From the given reactions, C₄H₁₂ is an organic compound that reacts with O₂ to produce water and CO₂.
Therefore this is the only reaction that follows the general equation for combustion.
3 0
3 years ago
4. Al2O3 (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H20(1) Find the mass of AlCl3 that is produced when 10.0 grams of Al2O3 react with 10.
slava [35]

Answer:

Are produced 12,1 g of AlCl₃ and 5,33 g of Al₂O₃ are left over

Explanation:

For the reaction:

Al₂O₃ (s) + 6 HCl (aq) → 2AlCl₃ (aq) + 3H₂0(l)

10,0g of Al₂O₃ are:

10,0g ₓ\frac{1mol}{102g} = <em>0,0980 moles</em>

And 10,0g of HCl are:

10,0 gₓ\frac{1mol}{36,5g} = <em>0,274 moles</em>

<em />

For a total reaction of 0,274 moles of HCl you need:

0,274×\frac{1molesAl_{2}O_3}{6 mole HCl} = <em>0,0457 moles of Al₂O₃</em>

Thus, limiting reactant is HCl

The grams produced of AlCl₃ are:

0,274 moles HCl ×\frac{2 moles AlCl_{3}}{6 moles HCl} × 133\frac{g}{mol} = <em>12,1 g of AlCl₃</em>

<em />

The moles of Al₂O₃ that don't react are:

0,0980 moles - 0,0457 moles =<em> </em>0,0523 moles

And its mass is:

0,0523 molesₓ\frac{102g}{1mol} = <em>5,33 g of Al₂O₃ </em>

<em />

I hope it helps!

7 0
3 years ago
name a household substance that could lower the pH of water leaving your home? increase the pH of water leaging your home? and w
Lady_Fox [76]
Bleach would increase the pH because Bleach is a basic substance with a pH of about 12

Soda would lower the pH because the pH of sodas is somewhere around 2.5 (this is for coke, other sodas are a bit different)
8 0
2 years ago
chemist is using 387 mL of solution of acid in water if 13.3 of the solution is acid how many milliliters of acid are there roun
Greeley [361]

Answer:

V acid = 51.471 mL

Explanation:

  • %v/v = [(compoud volumen)/(solution volume)]×100

∴ V solution = 387 mL

∴ %v/v = 13.3 %

compund volume:

⇒ (V acid)/( V sln) = 0.133

⇒ V acid = (0.133)(387 mL)

⇒ V acid = 51.471 mL

6 0
3 years ago
What energy does a heated element make
bekas [8.4K]

Answer:

electrical energy

Explanation:

A heating element converts electrical energy into heat through the process of resistive (otherwise known as Joule heating). The electric current passing through the element encounters resistance, which produces heat.

8 0
3 years ago
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