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disa [49]
3 years ago
9

I need help with this pleas ASAP this is over due

Chemistry
1 answer:
Trava [24]3 years ago
8 0
The answer is B.

Electrons emit energy when they return from the excited state to the ground state.
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How many moles of KCLO4 can be produced with 3.45 moles of NaCl. Assume all other reactants are in excess
ycow [4]
NOTE question is incorrect: The question should be:
<span>How many moles of KCLO4 can be produced with 3.45 moles of KCl. Assume all other reactants are in excess.
.......................................................................................................................

The reaction involving formation of KClO4 is 

NaClO4      +       KCl     </span>→    KClO4       +       NaCl

From above reaction, it can be seen that 1 mole of NaClO4 reacts with 1 mole of KCl to generate 1 mole of KClO4

Thus, if all other reactant are in excess, 3.45 moles of KCl  will react with 3.45 moles of NaClO4 to form 3.45 moles of KClO4.
4 0
3 years ago
A transmission electron microscope would be the best microscope choice to study _______.
pochemuha
A transmission electron microscope would be the best microscope choice to study A. Structures smaller than cells. <span>Transmission electron microscopes are best used to study the internal organs of a cell.</span>
7 0
3 years ago
Read 2 more answers
Using the average atomic mass, calculate the mass in grams of 143 iron atoms
melomori [17]

Answer:

1326.6 × 10⁻²³g

Explanation:

Given data:

Number of atoms of iron = 143 atoms

Average atomic mass of iron = 55.845 amu

Mass of iron = ?

Solution:

It is known that,

55.845 g of iron = one mole of iron = 6.02× 10²³ atoms

For 143 atoms:

143 atoms /6.02× 10²³ atoms × 55.845 g

23.754 × 10⁻²³× 55.845 g

1326.6 × 10⁻²³g

7 0
3 years ago
What are 3 pros and cons of nuclear transmutation?
umka21 [38]
Pros
It doesn't cost much
Power stations are ver compact
Transportation of the material is easy

Cons
It isn't safe
Nuclear waste take 200 years to degrade
Greater risk of explosion.
7 0
3 years ago
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What is NOT true for a catalyst? 1. A catalyst increases the rate of a chemical reaction by decreasing activation energy. 2. A c
Harrizon [31]

Answer:

3. A catalyst can convert an endothermic reaction into an exothermic reaction.

Explanation:

<em>What is NOT true for a catalyst? </em>

<em>1. A catalyst increases the rate of a chemical reaction by decreasing activation energy.</em> TRUE. A positive catalyst increases the reaction rate by decreasing the activation energy.

<em>2. A catalyst is not consumed in chemical reactions.</em> TRUE. A catalyst is recovered unaltered at the end of the reaction.

<em>3. A catalyst can convert an endothermic reaction into an exothermic reaction.</em> FALSE. A catalyst cannot modify the enthalpy of a reaction.

<em>4. A catalyst may be used in the solid, liquid or gaseous phase.</em> TRUE. If the catalyst is in the same phase as the reaction, the catalysis is homogeneous. Else, the catalysis is heterogeneous.

8 0
3 years ago
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