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BartSMP [9]
3 years ago
9

_____ sedimentary rocks are made of once-living things or their pieces. A. Organic B. Inorganic C. Chemical D. Fragmental

Chemistry
2 answers:
kramer3 years ago
8 0
I believe the answer is A. Hope this helps.
lawyer [7]3 years ago
7 0

Answer:

A. Organic

Explanation:

  • Once living things have rocks that are made up of organic content as sedimentary rocks are best suited to preserve the remains of the fossils and for keeping records.  
  • The organic sediments in rocks are formed due to the accumulation of organic debris collected from various natural sources. As there are swampy sediments that contain various carbon traces and are black, and soft.  
  • Fossils are very important elements of depositional environment and especially trace fossils like burrows, footprints and leaf impressions, etc. Some examples of corals and other shell fossils indicate marine deposition.
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What is the molecular formula of a compound with the empirical formula
ipn [44]

Answer:  C_2H_2O_2

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

The empirical formula is CHO

The empirical weight of CHO = 1(12)+1(1)+1(16)= 29 g.

The molecular weight = 60 g/mole

Now we have to calculate the molecular formula:

n=\frac{\text{Molecular weight}}{\text{Equivalent weight}}=\frac{60}{29}=2

The molecular formula will be=2\times CHO=C_2H_2O_2

Thus molecular formula will be C_2H_2O_2

5 0
3 years ago
For the reaction a2 + b2 → 2ab, ea(fwd) = 105 kj/mol and ea(rev) = 77 kj/mol. assuming the reaction occurs in one step, calculat
Lady bird [3.3K]
Answer is: 28 kJ.
Chemical reaction: A₂ + B₂ ⇄ 2AB.
Ea(forward) = 105 kJ/mol.
Ea(reverse) = 77 kJ/mol.
ΔH(reaction) = ?
<span>The enthalpy change of reaction is the change in the energy of the reactants to the products.
</span>ΔH(reaction) = Ea(forward) - Ea(reverse).
ΔH(reaction) = 105 kJ/mol - 77 kJ/mol.
ΔH(reaction) = 28 kJ/mol; this is endothermic reaction (ΔH <span>> 0).</span>

6 0
3 years ago
How is enthalpy related to the spontaneity of a reaction?
mina [271]

Answer:

D

Explanation:

Gibb's free energy change(∆G) and Standard electrode potential of electrochemical (Ecell) determine the spontaneity of a reaction.

when ∆G > 0, the reaction is not spontaneous

∆G < 0, the reaction is spontaneous

∆G = 0, the reaction is in equilibrium

when Ecell > 0, the redox reaction is spontaneous

Ecell < 0, the redox reaction is not spontaneous

Ecell = 0, the redox reaction is in equilibrium.

5 0
2 years ago
What is the total volume of solution that was dispensed from this burette?
kykrilka [37]

Answer:

it will a i did the quiz got it all right

Explanation:

5 0
3 years ago
What two factors determine the state of a substance
Elden [556K]
The answer is the chemical structure and the temperature
4 0
3 years ago
Read 2 more answers
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