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USPshnik [31]
1 year ago
7

Assertion (A): Naphthalene balls disappear with time without leaving any solid.

Chemistry
2 answers:
gogolik [260]1 year ago
7 0

Explanation:

a) Both A and R are true and R is the correct

explanation of A.

Kruka [31]1 year ago
7 0

Answer:

\fbox {c) A is true but R is false.}

Explanation:

Assertion (A):

⇒ Naphthalene balls disappear with time without leaving any solid.

⇒ True √

Reason (R):

⇒ Solid converted to liquid is called sublimation.

⇒ False ×

⇒ Solid converted to liquid is called <u>melting</u>

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Answer:

7.00

Explanation:

When the solutions are mixed, the HCl dissociates to form the ions H+ and Cl-. The ion H+ will react with the NH3 to form NH4+. The stoichiometry for this is 1 mol of HCl to 1 mol of H+ to 1 mol of Cl-, and 1 mol of H+ to 1 mol of NH3 to 1 mol of NH4+.

First, let's find the number of moles of each one of them, multiplying the concentration by the volume:

nH+ = 0.15 M * 25 mL = 3.75 mmol

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Type the correct answer in the box.
tatiyna

the mass of  1  mole of phosphorus atoms is approximately  30 g

hope this helps :)

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