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miss Akunina [59]
3 years ago
9

I need help please i need to pass

Chemistry
2 answers:
max2010maxim [7]3 years ago
8 0

second one is the right answer of question number 2

goldfiish [28.3K]3 years ago
4 0
Energy was released.
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An electric current can be best conducted by
Licemer1 [7]

Answer:

a metal

Explanation:

metals are good conductors of electricity.

7 0
3 years ago
What is the energy of the motion of objects that are attached together?
algol [13]

Answer:

Kinetic energy is the energy of the motion of objects that are attached together.

4 0
2 years ago
You produce 500 ml of a 0.001 m hclo4, which ionizes completely in water. What is the ph you should expect?
Alina [70]

Answer:

pH+3.0 normality

Explanation:

8 0
1 year ago
Calculate the molarity when 135 g of KCl is dissolved to make a 2.50 L solution. Round to two significant digits.
inysia [295]
<h2>0.72 mol/L</h2>

Explanation:

       \textrm{Molarity of a solution}=\frac{\textrm{Number of moles of solvent}}{\textrm{Volume of solution in Liters}}

       We are given a 2.50L solution which contains 135g of KCl.

       To calculate number of moles of KCl present, we need to find it's molar mass from charts. Molar Mass of KCl is known to be 74.55\frac{g}{Mol}.

       Number of moles of KCl present = \frac{\textrm{Given weight}}{\textrm{Molar Mass}}\textrm{ = }\frac{135g}{74.55\frac{g}{Mol}}\textrm{ = }1.81087mol

       Molarity = \frac{1.81087mol}{2.50L}=0.7243\frac{mol}{L}

∴ Molarity of given KCl solution = 0.72\frac{mol}{L}

7 0
3 years ago
The number of oxygen atoms in 48.0g of oxygen gas
Doss [256]

Answer:

Now u have 48 g of O2. There. Fore mole=weight/M. W. Of oxygen. Therefor 3mole.

After that if we to multiply the avogadro number with it. So 3 *NA

Now u want only atom calculation then we have 2 molecule of oxygen then multiply it with 2 too.

So final claculation is =3*2*NA.

Explanation:

your welcome

brainlest PLEASEEEEEEE!

3 0
3 years ago
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