1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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
You might be interested in
Each 5-ml teaspoon of Extra Strength Maalox Plus contains 450 mg of magnesium hydroxide and 500 mg of aluminum hydroxide. How ma
Art [367]

Answer:

0.0347 moles of hydronium ions

Explanation:

The equation of the neutralization reaction between hydroxide and hydronium ions is given below:

H₃O+ (aq) + OH- (aq) ----> 2 H₂O (l)

From the equation above, 1 mole of hydroxide ions will neutralize one mole hydronium ions.

The moles of hydroxide ions present in 1 teaspoon or 5 mL of antacid product is calculated as follows:

Number of moles = mass / molar mass

Molar mass of Magnesium hydroxide, Mg(OH)₂ = 58 g/mol

Molar mass of aluminium hydroxide, Al(OH)₃ = 78 g/mol

Mass of magnesium hydroxide = 450 g = 0.45 g

Mass of aluminium hydroxide = 500 mg = 0.5 g

Moles of magnesium hydroxide = (0.45/58) moles

Moles of aluminium hydroxide = (0.5/78) moles

Equation of the ionization of magnesium hydroxide and aluminium hydroxide is given below:

Mg(OH)₂ (aq) ----> Mg²+ (aq) + 2 OH- (aq)

Al(OH)₃ (aq) ---> Al³+ (aq) + 3 OH- (aq)

Number of moles of hydroxide ions present in (0.45/58) moles of magnesium hydroxide = 2 × (0.45/58) moles = 0.0155 moles

Number of moles of hydroxide ions present in (0.5/78) moles of aluminium hydroxide = 3 × (0.5/78) moles = 0.0192 moles

Total moles of hydroxide ions = 0.0155 + 0.0192 = 0.0347 moles hydroxide ions

Therefore, 0.0347 moles of hydroxide ions will neutralize 0.0347 moles of hydronium ions.

3 0
3 years ago
The mass of a 50-mL volumetric flask is 40.638 g. After adding 15.0 mL of 95% ethanol and adding enough water to complete the vo
Nuetrik [128]

Answer

0.9516 grams / mL (50.00 has 4 sig digs.)

Remark

You have a couple of extraneous numbers there. You don't care about anything except the mass of the flask +  water/alcohol mixture  (88.219 grams). and the mass of the flask (40.638 grams)

Formulas

  • mass water/alcohol mixture = mass of the flask with fluid - mass flask
  • density = mass / volume

Solution

mass water/alcohol mixture = 88.219 - 40.638 = 47.581

  • Volume = 50 mL
  • Density = mass / Volume
  • Density = 47.581/50
  • Density = 0.95162  There are 4 sig digs so the answer should be
  • 0.9516
3 0
3 years ago
2.40 g of NH4Cl is added to 19.4 g of water. Calculate the molality of the solution.
Sholpan [36]
Molality is the moles of solute per kg of solvent.

Moles of NH₄Cl = 2.4 / (14 + 4 x 1 + 35.5)
= 0.0448 mole

Molality = 0.0448 / (19.4 / 1000)
= 2.31 m
3 0
3 years ago
The observed brightness of a star depends on which factors?
dimulka [17.4K]

Answer:

b..............

Explanation:

......

6 0
3 years ago
Metals react by losing valence electrons. Which of the alkali metals loses its valence electrons most easily? Explain.
vodka [1.7K]

Answer:

lol you have an aot profile pic

3 0
3 years ago
Other questions:
  • He partial pressure of oxygen gas in our atmosphere is 0.21 atm. this is the partial pressure at which human lungs have evolved
    12·1 answer
  • When a reaction is at equilibrium, ________.
    11·1 answer
  • Why isn't a comet a planet?
    15·2 answers
  • Provide an example of a substance with non-polar bonds
    5·1 answer
  • From the following data, calculate the average bond enthalpy for the NOH bond: NH3(g) ¡NH2(g) 1 H(g) ¢H° 5 435 kJ/mol NH2(g) ¡NH
    7·1 answer
  • Can someone please help me on the second quick Check!!!!
    5·1 answer
  • Which substance contains particles held together by metallic bonds? A) N2(s) B) Ni(s) C) I2(s) D) Ne(s)
    14·1 answer
  • Iodine is an elemnt, but is Iodide an element or it is a compound?
    9·2 answers
  • What is the name for a change in the enviorment that causes an organism to change it's activity
    8·2 answers
  • How do you make a experiment for ions​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!