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Lesechka [4]
2 years ago
15

You are

Chemistry
1 answer:
timama [110]2 years ago
8 0
Eye protection, fire proof clothing, proper foot gear, just anything that you could prevent yourself from being burned because you are working with flammable materials.
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Susan needs to simplify the expression shown below what should be her first step
Digiron [165]
Susan should follow PEMDAS,

Parentheses
Exponents
Multiplication
Division
Addition
Subtraction,

So, the first step should be, to solve the equation in the parentheses.

I hope this helps!
5 0
3 years ago
When electrons are lost, a____ion is formed.
kati45 [8]

Answer:

Positive; negative

Explanation:

When electrons are lost, a positive ion is formed. A positive ion is called a cation.

When electrons are gained, a negative ion is formed. A negative ion is called an anion.

3 0
3 years ago
Read 2 more answers
What is the molecular weight mass for KOH
lubasha [3.4K]
The weight is 56.1056 g/Mol hoped this helped
5 0
3 years ago
Calculate the molarity of a 17.5% (by mass) aqueous solution of nitric acid. Select one: a. 2.74 m b. 4.33 m c. 0.274 m d. 3.04
den301095 [7]

Answer:

Option e.

Explanation:

Molarity is the concentration that indicates moles of solute in 1 L of solution.

We have another concentration, percent by mass.

Percent by mass indicates mass of solute in 100 g of solution.

Our solute is HNO₃, our solvent is water.

17.5 g of nitric acid is the mass of solute. We can convert them to moles:

17.5 g . 1mol / 63g = 0.278 moles

We do not have volume of solution. We assume the mass is 100 g because the percent by mass but we need density to state the volume.

Density = Mass / Volume

Mass / Density = Volume

Once we have the volume, we need to be sure the units is in L, to determine molarity

M = mol /L

4 0
3 years ago
A chocolate chip cookie can be separated by physical means, and it is not the same throughout.
yarga [219]
As a heterogeneous mixture
6 0
3 years ago
Read 2 more answers
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