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dlinn [17]
3 years ago
7

Which choice describes a population? A. all the gray squirrels that live in a forest B. a nonliving factor in an organism's envi

ronment C. an area characterized by a group of plants and animals D. all the organisms that interact in a lake
Chemistry
1 answer:
goldenfox [79]3 years ago
5 0
I believe D. because all the organisms that live in a lake can be a bunch of living things that would be considered a population and not a species. I canceled out B. from the get go because, I don’t believe non living organisms can be in a population ?

Please get back to me if I’m right or wrong :)
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Given the following equation: 8 Fe + S8 —> 8 FeS what mass of iron is needed to react with 5.65 mol of sulfur S8
Mekhanik [1.2K]

Answer:

2522g

Explanation:

8Fe + S8 —> 8FeS

From the question,

8moles of Fe required 1mole of S8.

Therefore, Xmol of Fe will require 5.65mol of S8 i.e

Xmol of Fe = 8 x 5.65 = 45.2moles

Now we need to covert 45.2moles to gram. This is illustrated below below:

Molar Mass of Fe = 55.8g/mol

Number of mole of Fe = 45.2moles

Mass of Fe =?

Mass = number of mole x molar Mass

Mass of Fe = 45.2 x 55.8

Mass of Fe = 2522g

Therefore, 2522g of Fe is needed for the reaction.

4 0
3 years ago
There is going to be a lot of these questions so keep a look out plz
Serga [27]

Answer:

the answer is B

Explanation:

5 0
3 years ago
Read 2 more answers
Which of these is an example of food engineering?
Andrej [43]

Answer:

a.labeling food with an ingredient list to inform consumers

Explanation:

3 0
3 years ago
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If 30cm³ of 0.45 mol dm3 HCl reacted with NaOH, how many moles of HCl reacted?​
77julia77 [94]

Moles HCl reacted : 0.0135

<h3>Further explanation</h3>

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

\large {\boxed {\bold {M ~ = ~ \dfrac {n} {V}}}

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

So to find the number of moles can be expressed as

n = V x M

The volume of HCl 30 cm³=3.10⁻² dm³

Molarity of HCl = 0.45 mol/dm³

so moles HCl reacted :

\tt n=3.10^{-2}\times 0.45=0.0135

3 0
3 years ago
Magnesium (Mg) reacts with chlorine gas (Cl2) to produce magnesium chloride (MgCl2). How many grams of Mg will reacts with 2 mol
Rom4ik [11]
Mg   +   Cl₂ -----> MgCl₂
24g     1 mol


24g Mg ---- 1 mol Cl₂
Xg Mg ------ 2 mol Cl₂
X = 2×24
<u>X = 48g Mg</u>
_________________
:)
7 0
3 years ago
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