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4 years ago

11

What assumption did you make about the reaction of kmno4 solution and h2c2o4 solution in those determinations that allowed you t

o consider k to be a constant?

1 answer:

a_sh-v [17]4 years ago

8 0

Check the attachment out.. I think thats what you looking for. I hope it helped. :)

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List the five characteristics a substance must have to be a mineral. Explain why coal and a glass marble are not minerals.

Bumek [7]

- Naturally occurring
- Inorganic
- Solid
- Definite chemical composition
- Ordered internal structure
A mineral has to be naturally occurring. Coal is not a mineral because it is carbon-based and comes from fossilized plants. Glass is non-crystalline solid.

6 0

3 years ago

Plz i need help please help

igomit [66]

Answer:

Metal

Explanation:

Metal is able to be shaped or stretched into wires without breaking

It is a good conductor because it has mobile electron and are solid in room temperature

Hope it helped :))

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3 years ago

Read 2 more answers

A patient comes in showing signs of severe depression. Dr. Jorgenson wants to order an EEG and hormone panel, while Dr. Frieden

Citrus2011 [14]

So what is the question asking exactly?

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4 years ago

Which of the following has the lowest Ka?a. carbonic acid b. dihydrogen phosphate c. phosphoric acid d. bicarbonate

Naya [18.7K]

Explanation:

A compound or molecule which will have least dissociation and that is not able to given hydrogen ion easily upon dissociation will also have a low value of $K_{a}$ .

Dissociation of the given compounds or species will be as follows.

$H_{2}CO_{3} \rightleftharpoons H^{+} + HCO^{-}_{3}$

$H_{2}PO^{-}_{4} \rightleftharpoons H^{+} + HPO^{-}_{4}$

$H_{3}PO_{4} \rightleftharpoons H_{+} + H_{2}PO^{-}_{4}$

As, chemical formula of bicarbonate is $HCO^{-}_{3}$ and due to the presence of a negative charge it is difficult to lose a positively charged hydrogen ion. This is because oppositely charged ions will be bonded by strong force of attraction.

Hence, it will not easily lose a hydrogen ion due to which bicarbonate has the lowest $K_{a}$ .

Thus, we can conclude that out of the given species bicarbonate has the lowest $K_{a}$ .

7 0

3 years ago

During photosynthesis, plant leaves take in carbon dioxide through _______ in their leaves. a stomata b xylem c phloem

Iteru [2.4K]

<h3>Answer:</h3>

Stomata

<h3>Explanation:</h3>

Photosynthesis refers to the process that takes place in green plants and some algae.
During the process, water and carbon dioxide are converted to nutrients or organic compounds using energy from sunlight.
The process takes place in the chloroplast on the leaves of green plants.
The water used during photosynthesis comes from the soil and then transported by xylem tissue to the leaves where the process takes place.
Carbon dioxide enters the leaves through the stomata which are the sites for gaseous exchange.
Sunlight is trapped by green pigments on the leaves known as chlorophyll.

7 0

3 years ago