1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Anika [276]
3 years ago
10

I need help with 1-4 can someone help me?

Chemistry
1 answer:
Viktor [21]3 years ago
8 0

Explanation:

Density = mass/volume

1. Work out the density of ethanol and benzene

Ethanol - mass = 3.9 g and volume = 5 mL

Density = mass/volume =3.9/5=0.78g/mL

Benzene - mass=4.4g and volume = 5 mL

Density = mass/volume = 4.4/5=0.88g/mL

So Benzene is more dense

2. Density=mass/volume=25/7-2=5g/mL

The reason why the volume of the object is 7mL - 2mL is because the amount of displaced water is the volume of the object

3. For the Bohr Model, google the image of it.

Protons are positive charged

Neutrons are neutral

Electrons are negative charged

4. Main difference is the location of the electron in the atom.

Bohr Model : electrons orbits the nucleus in fixed paths

Electron cloud model: only the electron's probable location is determined

You might be interested in
What would barium do to obtain a noble gas structure? gain 2 electrons lose 2 electrons gain 6 electrons lose 6 electrons
Tema [17]

Answer:

Lose two electrons.

Explanation:

Barium is present in group 2.

It is alkaline earth metal.

Its atomic number is 56.

Its electronic configuration is Ba₅₆ = [Xe] 6s².

In order to attain the noble gas electronic configuration it must loses its two valance electrons.

When barium loses it two electron its electronic configuration will equal to the Xenon.

The atomic number of xenon is 54 so barium must loses two electrons to becomes equal to the xenon.

4 0
3 years ago
The crust and upper mantle make up Earth's ____.
Alekssandra [29.7K]

Answer:

a. the lithosphere

Explanation:

google

7 0
2 years ago
What type of bonding is occuring in the compound below?
rewona [7]

Answer:

(B). it's metallic bonding

8 0
2 years ago
Which of the following is the ultimate byproduct of weathering?
NikAS [45]
Soil
the answer is soil

6 0
3 years ago
Read 2 more answers
What class of enzyme catalyzes addition of oxygen?
bulgar [2K]

Answer:

The answer is Lyase

Explanation:

Any enzyme that catalyzes the addition or removal of the elements water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds, as defined in physiology. Decarboxylases, for example, remove carbon dioxide from amino acids, while dehydrases eliminate water.

8 0
2 years ago
Other questions:
  • What is the limiting reactant if 8 g of Ba reacts with 2.8 g of Al2(SO4)3?
    10·1 answer
  • Chemical senses require _____ for transduction to occurgustatory and olfactory are the chemical senses required for transduction
    8·2 answers
  • these healthcare professionals are usually limited to the types of prescriptions they can write by a set standing orders.
    15·1 answer
  • Chemical compounds secreted by mammals and insects to communicate sexual readiness are called
    13·1 answer
  • The name of the METAL in an ionic compounds does not change<br><br> True or False
    6·1 answer
  • Give an example how we use science in our every day life
    9·2 answers
  • A 800 kg car zooms away from a red light with an acceleration of 7.6 m/s2. What is the
    7·1 answer
  • PLS HELP MEEEEEEEEEEEE​
    10·1 answer
  • HELP PLZ ITS DUE SOON!!
    13·1 answer
  • What happens to the kinetic energy of the bowling ball when it reaches the pins?​
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!