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Katyanochek1 [597]
3 years ago
10

What step of the scientific method might be the most difficult when studying creatures that lived millions of years ago?

Chemistry
1 answer:
DiKsa [7]3 years ago
3 0

Answer:

In my opinion testing with an experiment will be the most difficult when studying ancient creatures. You have to base off your research on fossils and might not be provided with accurate data depending on what your trying to prove or learn.

Explanation:

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igor_vitrenko [27]

Answer:

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Explanation:

This is correct

4 0
2 years ago
Which of the following best describes an example of applied chemistry?
hram777 [196]

Answer:

Explanation:

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4 0
2 years ago
The concentration of a biomolecule inside a rod-shaped prokaryotic cell is 0.0029 m. calculate the number of molecules inside th
bagirrra123 [75]
Molarity is expressed as:
Molarity = moles / liter

Given that the cell is rod-shaped, its volume is calculated using the formula for a cylinder's volume:

V = πr²L
V = π * (0.6)² * 4.9
V = 5.54 μm³

1 Liter = 10³ mm³
1 mm = 10³ μm
1 mm³ = 10⁹ μm³
1 liter = 10¹² μm³

So the volume in liters is:
5.54 x 10⁻¹² L

Moles = molarity * liters
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Moles = 1.61 x 10⁻¹⁴

To get the number of molecules, we multiply the moles by Avagadro's number

Number of molecules = 1.61 x 10⁻¹⁴ * 6.02 x 10²³

There are 9.69 x 10⁹ molecules in the cell
4 0
3 years ago
. A standard dry cell has an output voltage of A. 1.5 VDC. B. 1.1 VDC. C. 1.2 VDC. D. 2.0 VDC.
NikAS [45]
<span>The correct answer is letter A. 1.5 VDC. A standard dry cell has an output voltage of A. 1.5 VDC. Standard dry cell is a type of electricity-producing chemical cell, that is commonly use in households, and even portable devices. Dry cell is zinc-carbon cell and with nominal voltage of 1.5 volts.</span>
4 0
3 years ago
Which instrument is used to measure mass?
lara [203]
A triple beam balance is used to measure mass
5 0
2 years ago
Read 2 more answers
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