2 years ago

Why is burning not a pahse change

Chemistry

1 answer:

sergij07 [2.7K]2 years ago

5 0

Answer:

This is because it is a physical change not a chemical change.

You might be interested in

What is the chemical formula for salt?

Hoochie [10]

In terms of the most common type of salt, sodium chloride, NaCl is the chemical formula of this salt,

3 0

3 years ago

An atom has 24 protons, 22 electrons, and 28 neutrons. What is the ATOMIC # of the atom?

Over [174]

22 would be the answer

7 0

3 years ago

An element has an atomic mass of 69.66 amu. It has two

marin [14]

Answer: 63.26%

Explanation:

If we let the abundance of the first isotope be x, then:

$69.66=(68.9255)(x)+(70.9247)(1-x)\\69.66=68.9255x+70.9247-70.9247x\\-1.2647=-1.9992x\\x=\frac{-1.2647}{-1.9992} \approx 0.6326$

Which is equal to <u>63.26%</u>

7 0

2 years ago

According to VSEPR theory, a molecule with the general formula AX2E2 (A is the central atom, X is the bonded atom and E is a lon

ratelena [41]

Answer:

see explanation

Explanation:

An AX₂E₂ geometry is derived from an AX₄ parent geometry and is based upon 4 regions of electron density about the central element and defines a tetrahedral geometry and the geometry is bent angular.

An example is the water molecule (H₂O) with two covalent O - H bonds and two free pair electrons on the central oxygen element.

4 0

3 years ago

Question 1 of 10What does the second quantum number (1) describe?O A. Which sublevel the electron is inB. Which energy level is

scoundrel [369]

Explanation:

The second quantum number also called the orbital quantum number describes the type of orbital or shape of it.

Answer: D. The specific orbital within a sublevel.

7 0

1 year ago