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sattari [20]
4 years ago
9

Someone please help me I got a few minutes

Chemistry
2 answers:
HACTEHA [7]4 years ago
6 0

Answer:

30 feet /second

Explanation:

60 feet/ 2 sec = 30 feet/sec

valina [46]4 years ago
5 0

Answer:

30 feet/sec

Explanation:

Average speed = distance / time (distance divided by time)

Average speed = 60 feet / 2 seconds

Average speed = 30 feet/sec

So the anverage speed is 30 feet per second

HOPE IT HELPED

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Surface ocean currents curve to the right in the northern hemisphere because
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Esto se debe a la rotación de la tierra

Explanation:

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3 years ago
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Write the reaction rate expressions for the<br> following reactions?<br> 2H2+O2_____2H2O
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Answer:

see attachment

Explanation:

3 0
4 years ago
What is the pH of a solution made by mixing 200 mL of 0.025M HCl and 150 mL of 0.050 M HCl?
seraphim [82]

Answer:

The answer to your question is pH = 1.45  

Explanation:

Data

pH = ?

Volume 1 = 200 ml

[HCl] 1 = 0.025 M

Volume 2 = 150 ml

[HCl] 2 = 0.050 M

Process

1.- Calculate the number of moles of each solution

Solution 1

                Molarity = moles / volume

-Solve for moles

                moles = 0.025 x 0.2

result

               moles = 0.005

Solution 2

               moles = 0.050 x 0.15

-result

                moles = 0.0075

2.- Sum up the number of moles

Total moles = 0.005 + 0.0075

                   = 0.0125

3.- Sum up the volume

total volume = 200 + 150

                     350 ml or 0.35 l

4.- Calculate the final concentration

Molarity = 0.0125 / 0.35

              = 0.0357

5.- Calculate the pH

pH = -log [H⁺]

-Substitution

pH = -log[0.0357]

-Result

pH = 1.45    

8 0
4 years ago
What causes the shielding effect to remain constant across a period?
Ivanshal [37]
Electrons are added to the same principal energy level.
5 0
4 years ago
Hot asphalt poured onto flat ground cools to form a solid road surface. Chemical or physical change
Verdich [7]
<h2>Answer:</h2>

This is a physical change.

<h3>Explanation:</h3>

Hot asphalt is mixed with the sand crushed stones and spread onto the roads, when it gets dry it becomes hard giving a smooth straight surface of the road.

Asphalt is used to stick together stones and sand in the road.

It is a physical change because the phase of the asphalt changed from the liquid to solid.

At high temperature, asphalt is in liquid form and at room temperature, it is present in hard solid form.

6 0
3 years ago
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