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tangare [24]
2 years ago
8

What are 2 ways microscopes have changed and improved from the 16th century to present day?

Chemistry
1 answer:
Ivan2 years ago
5 0

Answer:

Glass and lens making have improved, and electronic features for microscopes have become available

Explanation:

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Determine the formula weight of Ca(no3)2
Zanzabum

Answer:

the formula is 164.088 g/mol

Explanation:

3 0
3 years ago
Predict the sign of enthalpy for reaction f+f=f2
guajiro [1.7K]
6+6=12


is your answer
6 0
3 years ago
What molarity of nitric acid (HNO3) was used if 2.00 L must be used to prepare 4.5 L of a 0.25 M HNO3 solution?
Ymorist [56]

The   molarity  of (HNO₃) that was used  if 2.00 L must  be used   to prepare 4.5 L  of a 0.25M HNO₃ solution is   0.563 M


 <u><em>calculation</em></u>

  This is calculated  usind  M₁V₁=M₂V₂  formula

where,

         M₁(  molarity ₁) = ?

         V₁( volume ₁) = 2.00 L

        M₁ (molarity ₂) = 0.25M

         V₂( volume₂) = 4.5 L

make M₁ the subject  of the formula by  diving both side of the formula  by V₁

   M₁  is therefore = M₂V₂/V₁

M₁ =[ (0.25 M  x 4.5 L) / 2.00 L ]  =0.563 M

5 0
3 years ago
Draw the Lewis structure for the compound with the formula COCl2COCl2. Use lines to show bonding electrons.
stira [4]

Answer :  The Lewis-dot structure of COCl_2 is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, COCl_2

As we know that carbon has '4' valence electrons, chlorine has '7' valence electron and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in COCl_2 = 1(4) + 2(7) + 1(6) = 24

According to Lewis-dot structure, there are 8 number of bonding electrons and 16 number of non-bonding electrons.

6 0
4 years ago
Brain cells, blood cells, muscle cells<br><br> These cells are an example of:?
TEA [102]

Answer:

Somatic Cells

Explanation:

Somatic cells are basically all bodily cells

4 0
3 years ago
Read 2 more answers
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