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Molodets [167]
3 years ago
11

What existed during the mesozoic era

Chemistry
1 answer:
Ilia_Sergeevich [38]3 years ago
3 0
Mezoic era began 252m years ago and ended 6.6m years ago.
It was a time of geological and biological transition. During this era the continents began to drift to their present configuration.
3 of the largest mass extinction occurred at this era. One which include the dinosaurs.
I hope this helped. :)
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What is the volume of 25 g iodine, density = 4.93 g/cm^3??​
aniked [119]
  • Mass=25g
  • Density=4.93g/cm^3

\\ \rm\rightarrowtail Volume=\dfrac{Mass}{Density}

\\ \rm\rightarrowtail Volume=\dfrac{25}{4.93}

\\ \rm\rightarrowtail Volume=5.1cm^3

8 0
2 years ago
What is true of a molecule
kobusy [5.1K]

Answer:

All molecules of a compound have the same properties

Explanation:

  • Molecules are particles of elements or compounds that are made of more than one atoms.
  • Molecules of an element are made up of similar atoms. For example, Oxygen molecule, O₂, has two oxygen atoms and chlorine molecule, Cl₂, has two chlorine atoms.
  • Molecules of a compound are made up of different types of atoms, for example, a water molecule, H₂O is made up of two hydrogen atoms and one oxygen atom.
  • Molecules of a compound have similar properties that are similar to that of the compound. The properties of a molecule of a compound are different from those of an individual atom.
6 0
3 years ago
U peus
mote1985 [20]

Gases

Explanation:

Gases are the highly compressible states of matter made up of tiny particles that are moving independently of one another and are present in large quantities on the earth surface.

There are three states of matter which are solid, liquid and gas.

  • The particles of a gas are very far apart and are held together by very weak attractive forces.
  • In a gas, the molecules are in continuous, random, straight -line motion
  • They are easily compressible due to the weak attraction between them.

Learn more:

State of matter brainly.com/question/10972073

#learnwithBrainly

7 0
3 years ago
How many moles of HCl are there in 75.0 mL of 0.325 M HCI?​
dangina [55]

Answer: The moles of HCl are 0.0244

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute = ?

V_s = volume of solution in ml

Now put all the given values in the formula of molality, we get

0.325=\frac{moles\times 1000}{75.0}

moles=0.0244

Therefore, the moles of HCl are 0.0244

3 0
3 years ago
How do you do empirical formula
mihalych1998 [28]

Answer:

ez

Explanation:

Step 1: Obtain the mass of each element present in grams. Element % = mass in g = m.

Step 2: Determine the number of moles of each type of atom present. ...

Step 3: Divide the number of moles of each element by the smallest number of moles. ...

Step 4: Convert numbers to whole numbers.

7 0
3 years ago
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