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iren2701 [21]
3 years ago
11

______Is analyzed by qualitative methods

Chemistry
1 answer:
Serga [27]3 years ago
4 0

Answer:

A. The identify of the poison used in a murder.

Explanation:

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What is the molarity of a solution of sulfuric acid if 49.0 mL of it are neutralized by a titration
vaieri [72.5K]

Answer:

THE MOLARITY OF THE ACID IS 0.232M

Explanation:

Molarity is the number of moles of solute per liter of a solution.

In titration, the molarity of the acid and the molarity of the base are related by this equation:

Ca VA / CbVb = na / nb

Ca = concentration of the acid = ?

Va = volume of the acid = 49 mL

Cb = concentration of the base = 0.333M

Vb = volume of the base = 68.4mL

Na = number of mole of acid = 1

Nb = number of mole of base = 2

Equation for the reaction:

H2SO4 + 2NaOH --------> Na2SO4 + 2H2O

Solving for the molarity of the acid, we have :

Ca = CbVbNa / VaNb

Ca = 0.333M * 68.4mL * 1 / 49mL *2

Ca = 22.7772 * 10^-3 / 98 *10^-3

Ca = 0.232M

The molarity of the acid is therefore 0.232M.

8 0
3 years ago
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Why does foliation occur? (Metamorphic rock)
dusya [7]
Foliation occurs when the pressure squeezes the flat or elongated minerals within a rock so that they become aligned.
5 0
3 years ago
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This element has the most protons of any element in group 15.?
lozanna [386]
Bismuth... hope it helps!
5 0
3 years ago
02.01]In the 1800s, John Dalton's atomic theory was that atoms are indivisible. Later, subatomic particles such as neutrons, ele
Luda [366]
The last one is the correct answer. The atomic structure can be broken down which is what the findings concerning protons, electrons and neutrons showed. The theory was thus modified. What remained was no chemical reaction could affect the basic structure of an atom.

Still the last choice is still true. The first choice is your second best answer because of what I wrote in the last sentence of the above paragraph. 

Last Choice <<<<< answer
8 0
3 years ago
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Balance the following chemical equation:<br>__N2H4+<br>__O2 =<br>__NO2 +<br>__H2O​
Deffense [45]

The answer for the following question is mentioned below.

N_{2}H_{4} +3 O_{2} →2 NO_{2} +2 H_{2} O

the equation is balanced.

Explanation:

The steps required to balance a chemical equation is:

Firstly,write the formula of the compound/substance.

Secondly,count the number of atoms in each element on each side of the equation

Thirdly,Adjust the co-efficient.Balance the atoms or the ions present in the greatest number.

You may do this by finding the lowest common multiple of two.

Continue systematically to balance the atoms or ions on the rest of the side (i.e.)on the other side.

Lastly,check the number of atoms each elements is same on both the sides

From the equation:

Before balancing the equation:

N_{2} H_{4} + O_{2} → NO_{2} + H_{2} O

After balancing the equation:

N_{2}H_{4} +3 O_{2} →2 NO_{2} +2 H_{2} O

Therefore the given equation is balanced.

4 0
3 years ago
Read 2 more answers
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