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3 years ago

In the periodic table which elements typically have similar properties

1 answer:

7 0

Elements which appear in the same column have similar properties (periodicity). For example, all of the elements in group XVII (17), the Halogens, all react in a similar fashion; they all like to attract one additional electron and form a -1 anion.

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A chemist prepares a solution of copper(II) fluoride by measuring out of copper(II) fluoride into a volumetric flask and filling

Simora [160]

The question is incomplete, here is the complete question.

A chemist prepares a solution of copper(II) fluoride by measuring out 0.0498 g of copper(II) fluoride into a 100.0mL volumetric flask and filling the flask to the mark with water.

Calculate the concentration in mol/L of the chemist's copper(II) fluoride solution. Round your answer to 3 significant digits.

Answer: The concentration of copper fluoride in the solution is $4.90\times 10^{-3}mol/L$

Explanation:

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

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

We are given:

Given mass of copper (II) fluoride = 0.0498 g

Molar mass of copper (II) fluoride = 101.54 g/mol

Volume of solution = 100.0 mL

Putting values in above equation, we get:

$\text{Molarity of copper (II) fluoride)=\frac{0.0498\times 1000}{101.54\times 100.0}\\\\\text{Molarity of copper (II) fluoride}=4.90\times 10^{-3}mol/L$

Hence, the concentration of copper fluoride in the solution is $4.90\times 10^{-3}mol/L$

4 0

3 years ago

Which symbol represents a type of radiation that has the same mass as an

sesenic [268]

Answer:

D.+1°e symbol represents a type of radiation that has the same mass as an electron and a positive charge.

4 0

2 years ago

Which of the following sequences correctly displays the energy transformation from the inside of a battery to the igniter inside

irinina [24]

Chemical energy, electrical energy, and heat energy

7 0

3 years ago

Read 2 more answers

. The pI is called ________________. The rule of calculating pI of an amino acid is that first, write the dissociation equation

umka21 [38]

Answer:

The isoelectric point is that the pH at which the compound is in an electronically neutral form.

For diss equations, please find them in the enclosed file.

The pIs of 2 amino acids:

Glutamate: pI = 3,2
Histidine: pI = 7,6

Explanation:

Formula for the pI calculation: pI = (pKa1 + pKa2)/2

Given 3 pKa :

Acid glutamic with an acid sidechain:

Use the lower 2 pKas (corresponding with 2 -COOH groups)

pKa1 = 2,19; pKa2 = 4,25; so pI = 3,2

Histidine with 2 amino groups:

Use the higher 2 pKas ( -COOH group and -NH= group)

pKa1 = 6; pKa2 = 9,17; so pI = 7,6

6 0

4 years ago

What is an ion in chemistry

Inga [223]

Its an atom, or molecule, [in which] the complete amount of electrons isn't equal to the complete amount of protons. (Giving the atom/molecule a positive or negative electrical charge).

If this is incorrect- I'm sorry! ^^;

4 0

3 years ago