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Elanso [62]
3 years ago
11

Which color changes represent a positive reaction for the presence of starch using the iodine test?

Chemistry
1 answer:
-BARSIC- [3]3 years ago
3 0
Looking at a ph level color chart, it should be moving to more acidic if it’s positive
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1) How many moles are in 4.0x10^24 atoms?
-Dominant- [34]

Answer:

<h2>6.64 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4 \times  {10}^{24} }{6.02 \times  {10}^{23} }   \\  = 6.644518...

We have the final answer as

<h3>6.64 moles</h3>

Hope this helps you

3 0
3 years ago
What is the only nonmetal in group 14?
Fantom [35]

Answer:

The only nonmetal in group 14 is carbon.

Explanation:

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Masja [62]

Answer:

SO2 is bonded covalently

Explanation:

Atoms that share electrons in a chemical bond have covalent bonds.

6 0
3 years ago
Someone please notice!! Explain the other parts such as the petal and receptacle do in the flower.
Troyanec [42]

Answer: well the receptacle connect the stalk to the flower and to support the flower and keeps the flower in an elevated position so as to attract the insects

Explanation: I don’t know if this helped

6 0
2 years ago
The ____ can be described as the basic unit of life. (2 points) atom neutron cell nucleus
Verizon [17]

Answer:

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