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gizmo_the_mogwai [7]
3 years ago
6

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

Chemistry
2 answers:
soldi70 [24.7K]3 years ago
7 0
Just divide the two (2 / 0.05) and you will get your answer; there are 40 drops of bloodin the collection tube.
Drupady [299]3 years ago
7 0

Answer : The number of drops of blood in a blood collect in tube are, 40.

Explanation :

As we are given that:

Volume of a drop of blood = 0.05 mL

Volume of blood collection tube that holds = 2 mL

Now we have to calculate the number of drops of blood collect in tube.

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

Now put all the given values in this expression, we get:

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

Therefore, the number of drops of blood in a blood collect in tube are, 40.

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A sample of oxygen gas is compressed from 30.6 L to 1.8 L at constant temperature pressure of 1.8 atm. Calculate the amount of e
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Answer:

the change in the internal energy of the system is 3,752.67 J

Explanation:

Given;

initial volume of the gas, V₁ = 30.6 L

final volume of the gas, V₂ = 1.8 L

constant pressure of the gas, P = 1.8 atm

Energy released by the system, Q = 1.5 kJ = 1,500 J

Apply pressure-volume work equation, to determine the work done on the gas;

w = -PΔV

w = -P(V₂ - V₁)

w = - 1.8 atm(1.8 L - 30.6 L)

w = 51.84 L.atm

w = 51.84 L.atm x 101.325 J/L.atm

w = 5,252.67 J

The change in the internal energy of the system is calculated as;

ΔU = Q + w

Since the heat is given out, Q = - 1,500 J

ΔU = -1,500 J  +  5,252.67 J

ΔU = 3,752.67 J

Therefore, the change in the internal energy of the system is 3,752.67 J

3 0
3 years ago
Imagine that you have a metal bar sitting half in the sun and half in the dark. On a sunny day, the part of the metal that has b
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Answer:

It will feel hot.

Explanation:

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A 4.00L flask containing Ne at 25 C and 6.00 atm is joined by a valve to an 8.00 L flask Ar at 25 C and 2.00 atm.
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Answer:

P=3.33atm

Explanation:

Hello!

In this case, since know the volume, temperature and pressure of the initial containers, we can compute the moles of each gas prior to the opening of the valve as shown below:

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Next, we add them up to obtain the total moles:

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Now, the total volume:

V_T=4.00L+8.00L=12.00L

Finally, the total pressure is computed by using the ideal gas equation:

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Best regards!

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3 years ago
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