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3 years ago

Are all synthetic products bad?

Chemistry

1 answer:

Alja [10]3 years ago

7 0

Most of them are . probably not all though

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A solution of sulfuric acid is titrated with a solution of sodium hydroxide to the phenolphthalein end point. The sample of sulf

qaws [65]

Answer:

a. 2NAOH + H2SO4 —> NA2SO4 + 2H2O

b. The concentration of the acid is 0.0638M

Explanation:Please see attachment for explanation

7 0

3 years ago

What is the mass of KOH found in a 785 mL of a 1.43 M solution of KOH

My name is Ann [436]

Molarity is defined as the ratio of number of moles to the volume of solution in litres.

The mathematical expression is given as:

$Molarity = \frac{Number of moles}{volume of solution in litres}$

Here, molarity is equal to 1.43 M and volume is equal to 785 mL.

Convert mL into L

As, 1 mL = 0.001 L

Thus, volume = $785\times 0.001$ = 0.785 L

Rearrange the formula of molarity in terms of number of moles:

$Number of moles =molarity\times volume of solution in litres$

n = $1.43 M \times 0.785 L$

= 1.12255 mole

Now, Number of moles = $\frac{mass in g}{molar mass}$

Molar mass of potassium hydroxide = 56.10 g/mol

1.12255 mole = $\frac{mass in g}{56.10 g/mol}$

mass in g = $1.12255 mole\times 56.10 g/mol$

= 62.97 g

Hence, mass of $KOH$ = 62.97 g

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3 years ago

An ion is an atom that has has gained or lost:

Elena L [17]

Electrons, specifically valence electrons

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3 years ago

A mole or fraction of a mole represents a _______number of atoms or molecules.

natulia [17]

A mole or fraction of a mole represents a specific <span>number of atoms or molecules. The correct option among all the options that are given in the question is the first option or option "a". The other choices in the question are incorrect. I hope that the answer has actually come to your great help.</span>

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3 years ago

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What particles would you find in a nucleus of an atom

sammy [17]

Answer:

The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus.

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3 years ago