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natta225 [31]
3 years ago
5

How did technology impact the development of the cell theory?

Chemistry
1 answer:
lidiya [134]3 years ago
8 0
It helped be able to look more closely at the the cells
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What is the concentration of a solution with a volume of 2.5 liters containing 600 grams of calcium phosphate?​
trapecia [35]

Answer:

1.12M

Explanation:

Given parameters:

Volume of solution  = 2.5L

Mass of Calcium phosphate  = 600g

Unknown:

Concentration  = ?

Solution:

Concentration is the number of moles of solute in a particular solution.

Now, we find the number of moles of the calcium phosphate from the given mass;

        Formula of calcium phosphate  = Ca₃PO₄

         molar mass = 3(40) + 31 + 4(16) = 215g/mol  

Number of moles of  Ca₃PO₄  = \frac{600}{215}   = 2.79moles

   Now;

  Concentration  = \frac{Number of moles }{volume }  

 Concentration  = \frac{2.79}{2.5}   = 1.12M

7 0
4 years ago
Which of the following correctly represents the radioactive decay of cesium-137?
Lelu [443]
The decay mode of cesium-137 is beta decay. This means that the cesium-137 decays into a beta particle and a nuclide with the same mass number, but with a charge number that is 1 more than that of cesium.

Therefore, this means Cs-137 decays into an electron and Barium-137, meaning the answer is choice 1.
6 0
2 years ago
A 400 mL sample of hydrogen gas is collected over water at 20°C and 760 torr the vapor pressure of water at 20°C is 17.5 torr. w
o-na [289]

Answer:

V2 = 17371.43ml

Explanation:

We use Boyles laws

since temperature is constant

P1V1=P2V2

760 x 400 = 17.5 x V2

304000 = 17.5 x V2

V2 = 304000/17.5

V2 = 17371.43ml

4 0
4 years ago
What are two ways to tell if a chemical reaction is taking place?
Kruka [31]
1) temperature change
2)odor or smell change
Hope this helps
4 0
4 years ago
Read 2 more answers
Which element(s) are not balanced in this equation ?
Alekssandra [29.7K]
Only the Fe is unbalanced.
:)
3 0
3 years ago
Read 2 more answers
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