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SCORPION-xisa [38]
2 years ago
6

Which of the following tools was responsible for advancing our knowledge of cells over the past 400 years?

Chemistry
1 answer:
Radda [10]2 years ago
7 0

Answer:

I have no clue sorry

Explanation:

good luck

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MUSCLES IN A KANGAROO'S LEGS WORK BECAUSE OF THE CELLS THAT MAKE UP THE MUSCLE. WHICH COMPONENT OF CELL THEORY DOES THIS BEST IL
Fed [463]

Answer:

b

Explanation:

4 0
2 years ago
Read 2 more answers
Explain how you would prepare a solution of sucrose with a molarity of 0.25.
Dimas [21]
Solution of 0.25 M is prepared in two steps,

1) Calculate Amount of Solute:

                                Molar Mass of Solute:  342.3 g/mol

As we know,
                            Molarity  =  Moles / 1 dm³
or,
                            Moles     =  Molarity × 1 dm³
Putting Values,
                            Moles     =  0.25 mol.dm⁻³ × 1 dm³

                            Moles     =  0.25 moles

Now, find out mass of sucrose,
As,               
                            Moles      =   Mass / M.mass
or,
                            Mass       =  Moles × M.mass
Putting Values,
                            Mass       =  0.25 mol × 342.3 g.mol⁻¹

                            Mass       =  85.57 g

2) Prepare Solution:
                               Take Volumetric flask and add 85.57 g of sucrose in it. Then add distilled water up to the mark of 1 dm³. Shake well! The solution prepared is 0.25 M in 1 Liter.
4 0
3 years ago
Which VIIA element doesn't have stable isotopes in nature?
Stolb23 [73]
Hello there.

<span>Which VIIA element doesn't have stable isotopes in nature?

</span>Db. At
8 0
3 years ago
Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen fluoride hf
pychu [463]
The  standard  state formation reaction  is  a  chemical  reaction  in  which one  moles  of  substance  in  its  standard state  is formed from  its constituent  element in  their  standard  state.All  the  substance must  be  in  their  most stable  state  at  100kpa  and  25  degrees  celsius.
therefore  for  HF is
1/2H2 +1/2F2 =HF
6 0
3 years ago
Read 2 more answers
I need help with this question. Thank you.
marishachu [46]
There are 76 atoms in total
3 0
2 years ago
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