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Gemiola [76]
3 years ago
5

WILL GIVE BRAINLIEST!!! NEED ANSWER RIGHT NOW!!!!!

Chemistry
1 answer:
rjkz [21]3 years ago
6 0

Normal forces occur at perpendicular angles to the surface between two objects.

Option B

<h3><u>Explanation:</u></h3>

The unit of force comes from its mathematical equation which says force is equal to the product of mass and acceleration. So, the unit of force becomes kg m/s². And this is the SI unit of force, which is also called newton. So 1 newton = 1 kgm/s².

Action at a distance forces are actually the non contact forces which can even work on a body even when the bodies aren't in contact with each other. The examples include gravitational force, magnetic and electric forces etc. So they don't need a physical contact between the two bodies.

But, normal forces are defined as the force that's acting directly on the axis of two bodies i.e perpendicularly to a surface or the part of a surface the body is resting. So, they have full impact on the touching surface.

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Calculate the pH and pOH of 0.010 mol OH- per liter
Sati [7]
We can use a variety of formulas to determine our answers here.

Our formula for pOH is -log(mol), and we can plug it in as -log(0.010). Take note that OH- is a base, not an acid. 

So, the pOH of OH- is 2.

To find pH we can set up this simple equation:
pH + pOH = 14
All we need to do is subtract 2 from 14, therefore the pH is 12.

This makes sense since acids range in the pH of 1-6, and we are dealing with a base. Hope I could help!
7 0
3 years ago
2. Use the Henderson-Hasselbalch equation to estimate the pH of a buffer solution that is composed of 20 mL of 10 M sodium forma
Mkey [24]

Answer:

pH of buffer =4.75

Explanation:

The pH of buffer solution is calculated using Henderson Hassalbalch's equation:

pH=pKa+log[\frac{[salt]}{[acid]}

Given:

pKa = 3.75

concentration of acid = concentration of formic acid = 1 M

concentration of salt =  concentration of sodium formate = 10 M

pH=3.75+log[\frac{10}{1}]=3.75+1=4.75

pH of buffer =4.75

7 0
3 years ago
If an element has a mass number of 222 and an atomic number of 86, how
svlad2 [7]

Answer:

136

Explanation:

The Mass Number is the combination of the amount of Protons and Neutrons in an element, so if the total mass is 222, and the amount of protons is 86, then you can do 86 + x = 222 to find that x is equal to 136

5 0
3 years ago
Balancing chemical equations
mojhsa [17]

<span>2H2 + O2 → 2H2O</span>

<span>
</span>

<span>okay???</span>

<span>
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4 0
3 years ago
This isn't a homework question but how do you get bruises off of your chest in like two days??
romanna [79]

Answer:

Im not sure how to get it off but i know if you put like some make up or foundation it will cover it.

Explanation:

Are you being abused

3 0
3 years ago
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