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xxTIMURxx [149]
3 years ago
12

5. Rubbing alcohol is a commonly used disinfectant and has a cooling effect when applied to the skin. The active ingredient in r

ubbing alcohol is isopropanol. In drugstores, the most common concentration of rubbing alcohol sold contains 70% (vol/vol) isopropanol in water. Assuming the rubbing alcohol manufacturer uses a 100% isopropanol solution, what volume of pure isopropanol is required to produce a 200-mL bottle of rubbing alcohol
Chemistry
1 answer:
WITCHER [35]3 years ago
8 0

Answer:

Explanation:

70% (vol/vol) means

cotnaimns 70 %(vol/vol) 70 ml of isoprapnol is there in 100 ml of Rubbing sold alcohol.

if it is 200 ml then obvouly it has the 70*2 =140 ml of isoproanol  required.

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3. How many moles of solute are present in a 2300 mL solution of 0.68 M MgSO.?​
Nostrana [21]

There are 1.56 moles of solute present in a 2300 mL solution of 0.68M MgSO4.

<h3>How to calculate number of moles?</h3>

The number of moles of a substance can be calculated by using the following formula:

molarity = no. of moles / volume

According to this question, a volume of 2300 mL solution is contained in 0.68 M MgSO4. The number of moles is calculated as follows:

no of moles = 0.68M × 2.3

no. of moles = 1.56

Therefore, there are 1.56 moles of solute present in a 2300 mL solution of 0.68M MgSO4.

Learn more about moles at: brainly.com/question/12127540

8 0
2 years ago
Question
deff fn [24]

Answer:

The volume of the gas is 0.015 m^3.

Explanation:

mass, m = 32 g

Temperature, T = 45 °C = 45 + 273 = 318 K

Pressure, P = 728 mm of hg = 0.728 x 13.6 x 1000 x 9.8 = 97027.84 Pa

Atomic mass = 4 x 12 + 10 x 1 = 58 g

Use the ideal gas equation

Let the volume is V.

P V = n R T

97027.8 \times V = \frac{32}{58}\times 8.31 \times 318 \\\\V = 0.015 m^3  

6 0
2 years ago
Read 2 more answers
Cells can use the glucose directly, without breaking it down, to carry out cellular processes. True or False?
Akimi4 [234]

Answer:

False

Explanation:

Glucose is a substrate which undergoes various chemical reactions in the mitochondria to produce ATP, which is the universal energy carrier.

6 0
2 years ago
How many ounces are in a 2-liter of soda? Just out of curiousity?
tamaranim1 [39]
There are 67.6 ounces in a 2-liter soda.
6 0
3 years ago
How many moles of Fe are needed to make 4 moles of FeCl2<br>​
Bingel [31]

The chemical equation of this reaction is: Fe + 2HCl -> FeCl2 + H2.

You can see that for 1mol of Fe you get 1mol of FeCl2. So you need 4mol of Fe to make 4mol of FeCl2.

6 0
3 years ago
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