All categories

3 years ago

Definition in your own words

Chemistry

1 answer:

Galina-37 [17]3 years ago

4 0

Answer:

Liquid,gas,solid and plasma

Explanation:

There four phases of matter. These phases are the gas phase(steam), the liquid phase(water), the solid phase(Ice) and finally the plasma phase(moucous).

You might be interested in

What is the effect of acid rain on the infrastructure of buildings and bridges ?

torisob [31]

The result of acid on rain on buildings and bridges would be decay and rotting, the chipping and loss of cement.

8 0

3 years ago

Read 2 more answers

Please help thank you (15 points)

sashaice [31]

Answer:

If the answer helps you PLEASE mark me as brainliest

Stay Safe, Stay Happy And stay healthy

6 0

3 years ago

If heat is supplied to the stillpot too rapidly, the ability to separate two liquids by fractional distillation may be drastical

almond37 [142]

Answer:

Yes, it's temperature dependent

Explanation:

A good fractional distillation depends largely upon maintaining a temperature gradient within the column. Perfectly, the temperature at the bottom of the column should be close or similar to the boiling temperature of the solution in the pot, and it should reduce continuously in the column until it reaches the boiling point of the more volatile component at the top of the column. If the distillation flask is heated too quickly, the whole column will heat up almost distributively and eliminate the desired temperature gradient. The result will be little fractionation and separation of the components.

3 0

3 years ago

Which of the following is the valence elec- tronic structure for a halogen? 1. n s1 2. n s2 3. n s2 n d10 4. n s2 n p5 5. n s2 n

Arturiano [62]

Answer: option 4. ns² np⁵

Explanation:

The valence electronic structure of the compounds is the distribution of the valence electrons, i.e. the outermost electrons of the atoms.

The distribution of the electrons in the atomic orbitals is named electron configuration.

Each element has a proper electron configuration which is determined according to a series of rules: lowest orbital energy, Pauli's exclusion principle and Hund's rule.

The valence electronic structure of the atoms is related with the period (column of the periodic table) to which the element belongs.

Each period has a characteristic valence structure (number and location of the outermost electrons). It is this structure what conferes the elements of a same period (column in the periodic table) their similar chemical properties.

This table summarizes the valence eletronic structure of the representative elements:

Period (column) name number of valence eletrons Structure

1 Alkali metals 1 ns¹

2 Alkaline earth metals 2 ns²

13 3 ns² np¹

14 4 ns² np²

15 Pnictogens 5 ns² np³

16 Chalcogens 6 ns² np⁴

17 Halogens 7 ns² np⁵

18 Noble gases 8 ns² np⁶

There you can see that the halogens belong to the period 17, have 7 valence electrons, and their valence electrons are have the structure ns² np⁵.

This is the specific valence electronic structure for the first five halogens:

Halogen atomic number row (n) period valence electronic structure

Fluor 9 2 15 2s² 2p⁵

Chlorine 17 3 15 3s² 3p⁵

Bromine 35 4 15 4s² 4p⁵

Iodine 53 5 15 5s² 5p⁵

Astatine 85 6 15 6s² 6p⁵

There you see the common structre ns² np⁵.

8 0

4 years ago

The decomposition of ozone in the upper atmosphere to dioxygen occurs by a two-step mechanism.The first step is a fast reversibl

alex41 [277]

Answer: Step 2 in the given mechanism is the rate determining step

Explanation:

In a mechanism of the reaction, the slow step in the mechanism determines the rate of the reaction.

The intermediate reaction of the mechanism follows:

Step 1: $O_3(g)\rightleftharpoons O_2(g)+O(g);\text{ (fast)}$

Step 2: $O_3(g)+O(g)\rightarrow 2O_2(g);\text{(slow)}$

As, step 2 is the slow step. It is the rate determining step

Rate law for the reaction follows:

$\text{Rate}=k[O_3][O]$

Hence, step 2 in the given mechanism is the rate determining step

8 0

4 years ago