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
aev [14]
2 years ago
6

250 milliliters of a concentrated iron (II) ion solution are sitting on the lab bench in need of analysis to determine its exact

concentration of Fe2+ ions. As part of the analysis a 15 mL sample of this solution was diluted to a final volume of 100 mL. The iron (II) ion concentration of the diluted solution was found to be 1.35 x 10-3 mg/mL Fe2+. What was the total number of milligrams of iron (II) that were contained in the original solution?
Note that this question is not asking for how many mg/mL of iron (II) where in the original solution, but the total mass of iron contained in the original solution. Hint: You must first calculate the mg/mL of iron (II) in the original solution.
Chemistry
1 answer:
Mars2501 [29]2 years ago
8 0

Answer:

2,25mg of Fe²⁺

Explanation:

A chemical concentration is defined as an amount of solute per amount of solution. The diluted solution has an iron (II) concentration of 1,35x10⁻³ mg/mL. As the dilution was of 15 mL in 100 mL, the concentration of the original solution is:

1,35x10⁻³ mg/mL ×\frac{100mL}{15mL} = <em>9,00x10⁻³ mg/mL</em>

As the total volume of the concentrated iron solution is 250 mL, the total mass of this solution is:

250 mL ×\frac{9,00x10^{-3}mg}{1mL} = <em>2,25 mg of Fe²⁺</em>

<em />

I hope it helps!

You might be interested in
ANSWER FAST PLZZZ!!!!!!!!!!!!!
goldfiish [28.3K]

Answer:

1 and 2

Explanation:

1 is negative

2 is negative

3 is positive

5 0
3 years ago
What is the mass of 4 × 1015 atoms of nickel<br> (Ni)?<br> Answer in units of g.
IRISSAK [1]

Answer:

4060

Explanation:

hope this helps

follow me for more answers

8 0
2 years ago
Read 2 more answers
Determine the empirical formula of a
k0ka [10]

Answer:

AuCl

Explanation:

Given parameters:

Mass of Gold  = 2.6444g

Mass of Chlorine  = 0.476g

Unknown:

Empirical formula  = ?

Solution:

Empirical formula is the simplest formula of a compound. Here is the way of determining this formula.

Elements                                     Au                                             Cl

Mass                                         2.6444                                     0.476

Molar mass                                 197                                          35.5

Number of moles                  2.6444/197                                 0.476/35.5

                                                 0.013                                           0.013

Divide by the

smallest                                 0.013/0.013                                 0.013/0.013

                                                       1                                                   1

The empirical formula of the compound is AuCl

3 0
2 years ago
Is cobalt 60 more dangerous than bananas ( potassium 40) and why ?
maxonik [38]

Answer:

To the best of my knowledge, it is because of the amount of gamma rays is given off.

Explanation:

While both are isotopes, Potassium 40 gives off fewer gamma rays compared to Cobalt 60. Potassium 40 isn't really harmful to humans, but Cobalt 60 (I believe) is used in chemotherapy.

7 0
3 years ago
In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond?
masha68 [24]

Answer:

A . 6.3 In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond

7 0
2 years ago
Other questions:
  • What is the formula of titanium(II) oxide?(1) TiO (3) Ti2O(2) TiO2 (4) Ti2O3
    6·1 answer
  • Use the ruler to determine the length of this object. Record your answer to the nearest tenth. The object is ____ long.
    10·1 answer
  • Help me please? I don't understand
    14·1 answer
  • Which 0.1 M aqueous solution is the best conductor of electricity /12561947/e9552934?utm_source=registration
    7·1 answer
  • An orange has a mass of 359 grams . How many kilograms is this?
    5·1 answer
  • 2. Osmium is a very dense metal. What is its density in g/cm3 if 50 grams of the metal occupies a volume of
    11·1 answer
  • Alteration of the physical form of a drug outside its label is
    6·1 answer
  • Which statement would support a merit of the Bronsted-Lowry base theory has over the Arrhenius base theory?
    6·2 answers
  • Brainliest if correct!!!!!
    13·2 answers
  • How can glass be a liquid if it's so hard?​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!