All categories

3 years ago

If solution A has twice as much solute as solution B is it possible for them to have the same concentration

1 answer:

6 0

The masses of solute in the 2 solutions can be different but result in the same concentration, this is best explained with examples.
Say solution A contained 10g of solute and had a volume of 100dm^3
If solution B contained 5g of solute and had a volume of 50dm^3 this would make the concentrations of A and B identical.

You might be interested in

Hemoglobin is a large protein molecule that is responsible for carrying oxygen through the blood. Iron ions are a relatively sma

gogolik [260]

Answer:

The percentage of volume taken by iron(II) in the blood cell is 0.0019%.

Explanation:

Radius of iron(II) ions ,r= 75.1 pm = $7.51\times 10^{-5} \mu m$

1 pm = 10^{-6} μm

Volume of sphere = $\frac{4}{3}\pi r^3$

Volume of single iron(II) ion = V

$V=\frac{4}{3}\times 3.14\times (7.51\times 10^{-5} \mu m)^3$

$V=1.7742\times 10^{-12} \mu m^3$

Number of iron(II) ions in one hemoglobin structure = 4

Number of hemoglobin structure in blood cell = $2.50\times 10^8$ molecules

Then number of iron (II) ions in $2.50\times 10^8$ molecules of hemoglobin:

$4\times 2.50\times 10^8 ions=10^9 ions$

Volume of $10^9$ ions of iron = $V\times 10^9$

Volume of the hemoglobin structure,V' = $95 \mu m^3$

Percentage volume of iron (II) ions in a single blood cell:

$\frac{10^9\times V}{V'}\times 100$

$\frac{10^9\times 1.7742\times 10^{-12} \mu m^3}{95 \mu m^3}\times 100$

= $0.0019\%$

5 0

2 years ago

How many grams of magnesium metal will react completely with 5.2 liters of 4.0 M HCl? Show all of the work needed to solve this

Temka [501]

Mghcl14 + H2 = mghclh 16 work needed to solve this problem

8 0

3 years ago

Iron (III) oxide - what does the III mean?

Aleonysh [2.5K]

Answer:

The iron is in the +3 oxidation state, which is what the III means.

7 0

2 years ago

Graduated cylinder is filled to 41.5mL with water, and a price of granite is placed in the cylinder displacing the level to 47.6

Y_Kistochka [10]

Answer:

6.1 cm³

Explanation:

To solve this problem we first need to keep in mind Archimedes' principle:

The volume of water (or any fluid) displaced by a submerged object is equal to the object's volume.

With that in mind we calculate the volume of the granite piece in mililiters:

Volume displaced = 47.6 mL - 41.5 mL = 6.1 mL
Volume of the granite piece = 6.1 mL

Given that one cubic centimeter is equal to one mililiter, the volume of the granite piece in cm³ is 6.1 cm³.

8 0

3 years ago

In IR spectroscopy, we normally talk about "frequencies" when in reality we are referring to wavenumbers. What is the mathematic

Svetach [21]

Answer:

Here's what I get.

Explanation:

(b) Wavenumber and wavelength

The wavenumber is the distance over which a cycle repeats, that is, it is the number of waves in a unit distance.

$\bar \nu = \dfrac{1}{\lambda}$

Thus, if λ = 3 µm,

$\bar \nu = \dfrac{1}{3 \times 10^{-6} \text{ m}}= 3.3 \times 10^{5}\text{ m}^{-1} = \textbf{3300 cm}^{-1}$

(a) Wavenumber and frequency

Since

λ = c/f and 1/λ = f/c

the relation between wavenumber and frequency is

$\bar \nu = \mathbf{\dfrac{f}{c}}$

Thus, if f = 90 THz

$\bar \nu = \dfrac{90 \times 10^{12} \text{ s}^{-1}}{3 \times 10^{8} \text{ m$\cdot$ s}^{-1}}= 3 \times 10^{5} \text{ m}^{-1} = \textbf{3000 cm}^{-1}$

(c) Units

(i) Frequency

The units are s⁻¹ or Hz.

(ii) Wavelength

The SI base unit is metres, but infrared wavelengths are usually measured in micrometres (roughly 2.5 µm to 20 µm).

(iii) Wavenumber

The SI base unit is m⁻¹, but infrared wavenumbers are usually measured in cm⁻¹ (roughly 4000 cm⁻¹ to 500 cm⁻¹).

8 0

3 years ago