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Dafna11 [192]
3 years ago
11

Helppppppp it's due for tomorrow

Chemistry
2 answers:
givi [52]3 years ago
7 0
The fins of a fish hope you do good on that homework
jek_recluse [69]3 years ago
3 0
C. the Fins of a fish , because of the branching out sort of structure
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Two students in the same class find that a piece of wood,
Naily [24]

Answer:

The wood is oak.

Explanation:

Given data:

Mass of wood = 70 g

Volume of wood = 103 cm³

Wood is oak = ?

Solution:

We will calculate the density of wood then we will compare it with literature value.

Density = mass/ volume

d = 70 g/ 103 cm³

d = 0.68 g/cm³

The density of oak is 0.59 - 0.90 g/cm³.

So its true, wood is oak.

5 0
3 years ago
Which are characteristics of natural selection? Select three options.
Luda [366]
Affects populations,
Occurs when there is genetic variation
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3 years ago
Carbonyl fluoride, COF2, is an important intermediate used in the production of fluorine-containing compounds. For instance, it
Sauron [17]

Answer:

The concentration of COF₂ at equilibrium is 0.296 M.

Explanation:

To solve this equilibrium problem we use an ICE Table. In this table, we recognize 3 stages: Initial(I), Change(C) and Equilibrium(E). In each row we record the <em>concentrations</em> or <em>changes in concentration</em> in that stage. For this reaction:

   2 COF₂(g) ⇌ CO₂(g) + CF₄(g)

I      2.00              0              0

C      -2x              +x            +x

E   2.00 - 2x         x              x

Then, we replace these equilibrium concentrations in the Kc expression, and solve for "x".

Kc=8.30=\frac{[CO_{2}] \times [CF_{4}] }{[COF_{2}]^{2} } =\frac{x^{2} }{(2.00-2x)^{2} } \\8.30=(\frac{x}{2.00-2x} )^{2} \\\sqrt{8.30} =\frac{x}{2.00-2x}\\5.76-5.76x=x\\x=0.852

The concentration of COF₂ at equilibrium is 2.00 -2x = 2.00 - 2 × 0.852 = 0.296 M

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3 years ago
A compound has an empirical formula of Na2CO3 and a molar mass of 318g/mol. Find its
GalinKa [24]

Answer:4

Explanation:

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3 years ago
Which of the following is similar among all living organisms on Earth?
statuscvo [17]

A. cellular function

 hope this helps :)

5 0
3 years ago
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