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3 years ago

In which environment would primary succession occur?

Chemistry

2 answers:

OLEGan [10]3 years ago

4 0

an area of exposed rock after a glacier melts away

taurus [48]3 years ago

3 0

Answer:

an area of exposed rock after a glacier melts away

Explanation:

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Which of these is a pure substance A.Diamond. B.Salt C.Ocean Water

Sveta_85 [38]

The Answer is - A.) Diamond

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2 years ago

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Hemoglobin is a large protein molecule that is responsible for carrying oxygen through the blood. Iron ions are a relatively sma

gogolik [260]

Answer:

The percentage of volume taken by iron(II) in the blood cell is 0.0019%.

Explanation:

Radius of iron(II) ions ,r= 75.1 pm = $7.51\times 10^{-5} \mu m$

1 pm = 10^{-6} μm

Volume of sphere = $\frac{4}{3}\pi r^3$

Volume of single iron(II) ion = V

$V=\frac{4}{3}\times 3.14\times (7.51\times 10^{-5} \mu m)^3$

$V=1.7742\times 10^{-12} \mu m^3$

Number of iron(II) ions in one hemoglobin structure = 4

Number of hemoglobin structure in blood cell = $2.50\times 10^8$ molecules

Then number of iron (II) ions in $2.50\times 10^8$ molecules of hemoglobin:

$4\times 2.50\times 10^8 ions=10^9 ions$

Volume of $10^9$ ions of iron = $V\times 10^9$

Volume of the hemoglobin structure,V' = $95 \mu m^3$

Percentage volume of iron (II) ions in a single blood cell:

$\frac{10^9\times V}{V'}\times 100$

$\frac{10^9\times 1.7742\times 10^{-12} \mu m^3}{95 \mu m^3}\times 100$

= $0.0019\%$

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2 years ago

What is the molarity of a solution made from 325.4g of Aluminum chloride with enough water te

balu736 [363]

Answer:

awdaef

Explanation:

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3 years ago

Why is acylation reagent important.

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Answer:

Acylation can be used to prevent rearrangement reactions that would normally occur in alkylation.

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2 years ago

How many divisions are used to classify living organisms? a) 5 b) 6 c) 8 d) 7

Nataly_w [17]

Answer:a

Living things are divided into five kingdoms: animal, plant, fungi, protist and monera

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