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2 years ago

30 POINTS PLZ HELP

Biology

1 answer:

STALIN [3.7K]2 years ago

8 0

Answer:

let me take the test i will tell you after

Explanation:

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Help me figure out the right answer please

Lady bird [3.3K]

The answer is A: Synaptic cleft, motor end plate

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3 years ago

What is the pH if 20 mL of pH = 2 solution is diluted to a final volume of 600 mL?

Mashutka [201]

Explanation:

Hydrogen atoms contain 1 proton and 1 electron while being devoid of neutrons. When they lose their electron they form an ion or H+, a particle carrying a unit of positive charge. pH measures how basic or acidic a water-based solutions are, with a formula for pH is

pH = -log[H+].

...where pH is -base 10 log of the concentration of hydrogen ions within the solution.

Initial volume= 20 mL

Final volume= 600 mL

# of dilutions= $\frac{600}{20}$ = 30

for a pH 2= [H+]= $10^{=2}$

∴ [H+]= $\frac{10^{-2}}{30} = 3.333 * 10^{-4}$

and pH is an antilog of [H+]= - log $\frac{10^{-2}}{30} = 3.333 * 10^{-4}$

∴pH = 3.47

Learn more about pH at brainly.com/question/4981491

Learn more about pKA at brainly.com/question/11062486

#LearnWithBrainly

7 0

3 years ago

Which best describes a person's carbon footprint?

hoa [83]

A. The amount of carbon dioxide a person releases into the atmosphere

4 0

3 years ago

The energy lost during transformation is always in the form of:

levacccp [35]

Answer:

Heat Energy

Explanation:

When energy is transformed from one form to another, or moved from one place to another, or from one system to another there is energy loss. This means that when energy is converted to a different form, some of the input energy is turned into a highly disordered form of energy, like heat.

Hope this helped! :^)

8 0

2 years ago

Which statement about Earth's layers is true?

Svetlanka [38]

Answer:

Explanation:

The do vary in size and temperature because as the layers go down to the core it gets harder and magma is more present

6 0

3 years ago

Read 2 more answers

*30 POINTS* PLZ HELP

30 POINTS PLZ HELP