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AlexFokin [52]
3 years ago
8

Dominic made the table below to organize his notes about mixtures. A 1-column table. The first column labeled properties of mixt

ures. Row 1 says: has no set composition. Row 2 is must have more than one state of matter. Row 3 is must have more than one substance. What mistake did Dominic make? A. The title should read “Properties of Solutions” because some mixtures do not have all of the properties listed. B. There is a definite recipe to make each mixture, so the composition of a mixture is set. C. Although it is possible to have more than one state, it is also possible to have only one state. D. A single substance can be used to make a mixture if the substance is composed of more than one element.
Chemistry
1 answer:
Ksivusya [100]3 years ago
4 0
Yesterday was the best day for my birthday so far so I had a great day omy birthday and
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A chemist weighs out 0.0865 g of sulfurous acid, H2SO3, which is a diprotic acid into a 250. mL of volumetric flask and dilutes
kobusy [5.1K]

<u>Answer:</u> The volume of NaOH needed to add is 12.35 mL

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of sulfurous acid = 0.0865 g

Molar mass of sulfurous acid = 82.079 g/mol

Volume of solution = 250 mL

Putting values in above equation, we get:

\text{Molarity of sulfurous acid}=\frac{0.0865\times 1000}{82.079\times 250}\\\\\text{Molarity of sulfurous acid}=0.0042M

To calculate the volume of base, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is H_2SO_3

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=2\\M_1=0.0042M\\V_1=250mL\\n_2=1\\M_2=0.1700M\\V_2=?mL

Putting values in above equation, we get:

2\times 0.0042\times 250=1\times 0.1700\times V_2\\\\V_2=\frac{2\times 0.0042\times 250}{1\times 0.1700}=12.35mL

Hence, the volume of NaOH needed to add is 12.35 mL

3 0
4 years ago
Determine the number of protons and neutrons in an atom of Uranium - 238
Mila [183]

Answer:

146

Explanation:

uranium is 92 and the mass number of the isotope is given as a 238 therefore it is not the two protons 92 electrons and

real explanation Google it

7 0
3 years ago
Diffusion is a general term referring to the net movement of atoms and molecules along a concentration gradient, from an area of
aniked [119]

Answer:

Higher concentration to an area of lower concentration

Explanation:

When you open a perfume bottle at a corner of a room, after a while, its fragrance can be perceived across a distance at the other end of the room. This is because, molecules of the compound in the fragrance have moved from the area of higher concentration in the perfume bottle, across a concentration gradient to a region of lower concentration at the other end of the room. This is diffusion.

7 0
3 years ago
2 bromocyclopentanamine structural formula
Elis [28]

Answer:

The structure is given in attached file.

Explanation:

Explanation

2-bromocyclopentamine (Figure attached) is a synthetic compound which is synthesized by substitution reaction of cyclopentamine and hydrobromide. Its molecular formula and molecular mass are C5H10NBr and 164.05 mol/g respectively.  It is a very reactive compound so it doesn’t available in pure form, it is present in market as a mixture of 2-bromocyclopentamine and Hydrobromide.

Properties :

Its boiling point is 115 0C

Its melting point is – 75 oC

It is highly flammable

It is highly toxic

It is irritant

It is corrosive in nature

5 0
4 years ago
Which sample contains the most concentrated solution of hydrochloric acid (HCl)?
spayn [35]
The answer for this is b 
4 0
3 years ago
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