All categories

2 years ago

Difference between a row (“period”) & a column (“group”) on the periodic table and examples.

2 answers:

5 0

The rows are the one line of elements that goes from left to right horizontally. A column is a line of elements that goes vertically.

dalvyx [7]2 years ago

4 0

Groups are number of valance electrons and periods are number of electron shells. the gtoups 13-18 have 3-8 valance electrons and groups 1 and 2 have 1 and 2 valance electrons

You might be interested in

10: Convert 77.0 L at 18.0 mmHg to its new volume at standard pressure.

olchik [2.2K]

Answer:

The answer to your question is V2 = 1.82 l

Explanation:

Data

Volume 1 = 77 l

Pressure 1 = 18 mmHg

Volume 2 = ?

Pressure 2 = 760 mmHg

Process

Use Boyle's law to solve this problem

P1V1 = P2V2

-Solve for V2

V2 = P1V1/P2

-Substitution

V2 = (18 x 77) / 760

-Simplification

V2 = 1386 / 760

-Result

V2 = 1.82 l

5 0

3 years ago

Use the following equation to answer the questions below.

notsponge [240]

Answer:

202

Explanation:

7 0

2 years ago

What is the term for a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concent

Lubov Fominskaja [6]

The answer is:
Osmosis

5 0

2 years ago

Definition of volume

AysviL [449]

Answer:

The amount of space an object occupies.

Explanation:

3 0

2 years ago

The decomposition of acetaldehyde is a second order reaction with a rate constant of 4.71 10−8 L/mol/s. What is the instantaneou

pochemuha

Answer: Rate of decomposition of acetaldehyde in a solution is $1.45\times 10^{-14}mol/Ls$

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

For a reaction : $A\rightarrow products$

$Rate=k[A]^x$

k= rate constant

x = order of the reaction = 2

$Rate=4.71\times 10^{-8}L/mol/s\times {5.55\times 10^{-4}M}^2$

$Rate=1.45\times 10^{-14}$

Thus rate of decomposition of acetaldehyde in a solution is $1.45\times 10^{-14}mol/Ls$

6 0

2 years ago