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Valentin [98]
3 years ago
10

What is the density of a block of wood that has a mass of 125grams and volume of 25.6mL?

Chemistry
1 answer:
Darya [45]3 years ago
8 0
Since density is = to mass/volume, you would do this:

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Write the overall balanced equation for the reaction:<br><br> N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)
zzz [600]

Answer:

This reaction has infinite ways to be balanced

Explanation:

To balance this equation we can use the algebraic method:

N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)

Where we write each molecule as a letter:

A + B → C + D + E

Then, we write the equations according the number of atoms of each molecule. That is:

Oxygen → 4A + B = C + 2D + 2E <em>(1)</em>

Nitrogen → 2A = C + E <em>(2)</em>

Carbon → B = D <em>(3)</em>

Then, we have to give 1 arbitral number for a letter. For example:

B = 1; D = 1

<em>(1) </em>4A + 1 = C + 2 + 2E

4A = C + 2E + 1

2A = C + E <em>(2) </em>Twice <em>(2):</em>

4A = 2C + 2E

Subtracting <em>(1) </em>in <em>(2)</em>

C + 2E + 1 = 2C + 2E

C + 1 = 2C

1 = C

Si 1 = C:

4A + 1 = 1 + 2 + 2E

4A = 2 + 2E <em>(1)</em>

y:

2A = 1 + E <em>(2)</em>

Twice:

4A = 2 + 2E

As <em>(1) </em>and <em>(2) </em>are the same equation:

<h3>This reaction has infinite ways to be balanced</h3><h3 />

For example:

N2O4(g) + CO → NO(g) + CO2(g)+NO2(g)

8 0
3 years ago
Which of the following statements is true?
Liula [17]
D) during chemical reactions the number and types of atoms
4 0
3 years ago
Read 2 more answers
The standard temperature and pressure of gases are OK and 1 atm, respectively. (T/F)
babymother [125]

Answer:

Explanation:

0 degrees kelvin is mighty cold. It should be 0 degrees Celsius.

The answer is false.

8 0
4 years ago
What happens when liquid changes to gas?
Nady [450]

Answer:

#1

The temperature that this happens is called the freezing point and is the same temperature as the melting point. As more energy is put into the system, the water heats up, the molecules begin moving faster and faster until there is finally enough energy in the system to totally overcome the attractive forces.

Explanation:

#2

Heating a liquid increases the speed of the molecules. An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. ... A decrease in the speed of the molecules allows the attractions between molecules to bring them a little closer together.

4 0
3 years ago
How is electron movement related to covalent bonding in ammonia, NH3?
antoniya [11.8K]

How is electron movement related to covalent bonding in ammonia, NH3?

A) Electrostatic sharing in a sea of electrons around the atoms allows bonds to form. 
B) The atomic orbitals overlap and electrons are shared between the atoms forming bonds. 
C) A transfer of electrons forms ions which are electrostatically attracted forming bonds. 
D) Orbital exchange occurs between the atoms to redistribute the electrons and form bonds.

The electron movement related to covalent bonding in ammonia, NH3 is The atomic orbitals overlap and electrons are shared between the atoms forming bonds. The answer is letter B.

4 0
3 years ago
Read 2 more answers
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