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Sladkaya [172]
3 years ago
7

If a drop of blood is 0.05 mL, how many drops of blood are in the blood collection tube that holds 2 mL?

Chemistry
2 answers:
natulia [17]3 years ago
8 0

Answer:

40 drops of blood are in the blood collection tube that holds 2 mL.

Explanation:

Consider the provided information.

It is given that a drop of blood is 0.05 mL

This can be written as

1 drop = 0.05 mL

Now we want to calculate how many drops of blood are in the blood collection tube that holds 2 mL.

\text{Number of drops of blood}=\frac{\text{Volume of blood collect in a tube}}{\text{Volume of a drop of blood}}

Substitute the respective value in above formula.

\text{Number of drops of blood}=\frac{2mL}{0.05mL}=40

Hence, 40 drops of blood are in the blood collection tube that holds 2 mL.

Irina18 [472]3 years ago
5 0
40 drops of blood in a tube that holds 2 mL
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Combustion of 9.511 grams of c4h10 will yield ____ grams of CO2
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Answer:

\boxed{28.81}

Explanation:

We know we will need an equation with masses and molar masses, so let’s gather all the information in one place.  

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1. Moles of C₄H₁₀

\text{Moles of C$_{4}$H$_{10} $} = \text{ 9.511 g C$_{4}$H$_{10} $} \times \dfrac{\text{1 mol C$_{4}$H$_{10} $}}{\text{ 58.12 g C$_{4}$H$_{10} $}} = \text{0.1636 mol C$_{4}$H$_{10}$}

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The molar ratio is 8 mol CO₂:2 mol C₄H₁₀

\text{Moles of CO}_{2} =\text{0.1636 mol C$_{4}$H$_{10} $} \times \dfrac{\text{8 mol CO}_{2}}{\text{2 mol C$_{4}$H$_{10}$}} = \text{0.6546 mol CO}_{2}

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Problem PageQuestion Gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If of w
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<h2> = ( 1.08 / 2.2 ) 100% = 49%</h2>

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Calculate moles of CH₃CH₃ and O₂

1.2 ₃₃ ( 1 ₃₃/ 30.0694 ₃₃ ) = 0.040 ₃₃

8.6 ₂ ( 1 2/ 31.998 ₂ ) = 0.27 ₃₃

Find limiting reagent  0.040 ₃₃ ( 5 ₂/ 2 ₃₃ ) = 0.10 ₂

CH₃CH₃ is the limiting Reagent

CH₃CH₃ (L.R.) O₂ CO₂ H₂O

Initial (mol) 0.040 0.27 0 0

Change (mol) -2x=-0 -5x= -0.10  +2x=+0.040 +6x=+0.12

Final (mol) 0 0.117 0.040 0.12

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0.12 ₂ ( 18.0148 ₂ /1 ₂ ) = 2.2 ₂  

= ( 1.08 / 2.2 ) 100% = 49%

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