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Phoenix [80]
3 years ago
7

For the reaction C2H5OH + O2 --> 3CO2 + 3H2O

Chemistry
1 answer:
Lelechka [254]3 years ago
8 0
The reaction given above is a combustion reaction. All combustion reactions are exothermic, meaning they give off heat when they react,
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How do you know that some substances in coffee beans are soluble?
Fantom [35]

Answer:

When you make coffee, some of the compounds from the ground coffee end up in the water, giving it the distinctive color, aroma, and flavor that we associate with coffee. The solubility of some coffee constituents varies depending on the temperature of the water.

Explanation:

8 0
2 years ago
analytical chemists can detect very small amounts of amoin acids , down to 3x10^-21 mol. how many molecules of an amino acid (mr
sesenic [268]
The number of particles in one mole is given be Avagadro's number <span>6.022×10^23

Multiply by number of moles.

3 ×10^-21 mol * 6.022 ×10^23 molecules/mol = </span><span>1,807 molecules
(rounded to nearest whole number)
 </span>
6 0
3 years ago
Which of these household items is powered by alternating current?
AlladinOne [14]

Answer:

C. Hair dryer

Explanation:

Alternating Current

The other kind of electricity is called alternating current, or AC. Power plants produce this

type of electricity. It is carried by large power lines from the plant to your home. When you

plug a TV, a lamp, or a hair dryer into the wall socket, you are using this type of electricity.  

3 0
3 years ago
14 km is how many centimeters?
Yuki888 [10]

Answer:

1400000 cm

Explanation:

14 km equals to 1400000 cm (14 km = 1400000 cm)

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8 0
3 years ago
What volume of a 2.25 M sodium chloride solution will contain 4.58 moles of sodium chloride
Rzqust [24]

Answer:

Option E. 2.04 L

Explanation:

Data obtained from the question include:

Molarity of NaCl = 2.25 M

Mole of NaCl = 4.58 moles

Volume =..?

Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:

Molarity = mole /Volume

With the above formula, we can obtain the volume of the solution as follow:

Molarity = mole /Volume

2.25 = 4.58/volume

Cross multiply

2.25 x volume = 4.58

Divide both side by 2.25

Volume = 4.58/2.25

Volume = 2.04 L

Therefore, the volume of the solution is 2.04 L

6 0
3 years ago
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