______ is/are usually the best conductor/s.

Define the term ligand. Cu2+(aq) reacts with ammonia to form the complex ion

photoshop1234 [79]

The answer is ligand: a molecule or ion that can bond to a (central) metal ion (to form a complex);
NH3: Lewis base and Cu2+: Lewis acid (need both for mark);
each NH3/ligand donates an electron pair (to Cu2+); forming coordinate covalent/dative covalent bond; i hope this help you.

4 0

3 years ago

Monochloroacetic acid (HC2H2ClO2) is a skin irritant that is used in "chemical peels" intended to remove the top layer of dead s

yaroslaw [1]

Answer: The pH of the solution is 1.703

Explanation:

We are given:

Concentration of monochloroacetic acid = 0.31 M

The chemical equation for the dissociation of monochloroacetic acid follows:

$HC_2H_2ClO_2\rightleftharpoons H^++C_2H_2ClO_2^-$

Initial: 0.31

At eqllm: 0.31-x x x

The expression of $K_a$ for above equation follows:

$K_a=\frac{[H^+][C_2H_2ClO_2^-}}{[HC_2H_2ClO_2]}$

We are given:

$K_a=1.35\times 10^{-3}$

Putting values in above equation follows:

$1.35\times 10^{-3}=\frac{x\times x}{(0.31-x)}\\\\x=-0.021,0.0198$

Neglecting the negative value of 'x' because concentration cannot be negative.

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

$pH=-\log[H^+]$

$pH=-\log (0.0198)\\\\pH=1.703$

Hence, the pH of the solution is 1.703

5 0

4 years ago

Why is an intensive property different from an extensive property

damaskus [11]

Answer:

check out this website,it might help.

Explanation:

https://courses.lumenlearning.com/boundless-chemistry/chapter/physical-and-chemical-properties-of-matter/

Im really not the smartest in the world.

Website was not made by me, im just a lazy potat0.

6 0

3 years ago

Determine the number of moles of sodium contained in 3.148 x 1022 formula units of sodium sulfate using dimensional analysis.

Zolol [24]

Answer:

0.0522 mol NaSo4

Explanation:

3.148 x 10^22 Formula units NaSo4 * 1 mol NaSo4 / 6.02 x 10^23 Formula units NaSo4 = 0.0522 mol NaSo4

6 0

2 years ago

Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose (molar mass = 180.2 g/mol in 920.0 ml of wate

Fynjy0 [20]

Given data: molar mass = 180.2 g/mol in 920.0 ml of water at 25 °c.
the vapor pressure of pure water at 25 °c is 23.76 mm hg.
Asked: the vapor pressure of a solution made by dissolving 109 grams of glucose

Solution:
moles glucose = 109 g/ 180.2 g/mol=0.605
mass water = 920 mL x 1 g/mL = 920 g
moles water = 920 g/ 18.02 g/mol=51.1
mole fraction water = 51.1 / 51.1 + 0.605 =0.988
vapor pressure solution = 0.988 x 23.76 = 23.47 mm Hg

6 0

4 years ago