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k0ka [10]
3 years ago
7

The location of four different fossils in the layers of a rock are listed below. Fossil A: Second layer from top Fossil B: Third

layer from top Fossil C: Top layer Fossil D: Bottom layer Which fossil is the youngest?
Chemistry
2 answers:
maxonik [38]3 years ago
4 0
Fossil C is the youngest. Layers further down were placed earlier than others. Because C is on the top layer, it must be the youngest (unless a disaster mixed up all the layers!).
Maru [420]3 years ago
4 0

Answer:

Of course it's Fossil C: Top Layer. Because it is the top layer (meaning the first layer). And the first layer is always younger. And i also took the test on flvs and its correct

Explanation:

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33. Hydrocarbons that release pleasant odors are called_________<br> hydrocarbons. (1 point)
olya-2409 [2.1K]

Answer:

Aromatic Hydrocarbons

Explanation:

Aromatic (Pleasant Odour) Hydrocarbons are those having pleasant odours.

8 0
3 years ago
Read 2 more answers
When the disk of the moon masks the disk of the sun, it creates a _________ eclipse.
Dvinal [7]
When the disk of the moon mask the the disk of the sun,it creates a (solar) eclipse.
4 0
3 years ago
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PLS HELP!! <br> Balance this equation: __H2+ 2 O2---&gt; 2 H2O
alekssr [168]

Answer:

 2H₂   +   O₂  →   2H₂O

Explanation:

The expression of the equation is given as:

              _H₂   +   2O₂  →   2H₂O

Now for expression above,

                           Reactants                                          Products

H                              2                                                            4

O                              4                                                           2

to balance the equation, we use 2 moles of hydrogen gas and 1 mole of oxygen gas;

           2H₂   +   O₂  →   2H₂O

6 0
3 years ago
What would be the empirical formula of a compound that is 25.5% carbon, 6.40% hydrogen, and 68.1% oxygen?
aleksandr82 [10.1K]
Empirical formula is the simplest ratio of whole numbers of components in a compound 
in 100 g of compound 
                                C                          H                          O
mass                   25.5 g                     6.40 g                 68.1 g
number of moles  25.5 g/12 g/mol      6.40 g/ 1 g/mol      68.1 g/ 16 g/mol 
                             = 2.13 mol              = 6.40 mol          = 4.26 mol
divide by least number of moles 
                             2.13/2.13 = 1          6.40/2.13 = 3.0    4.26/2.13 = 2.0
all rounded off 
C - 1
H - 3
O - 2

empirical formula - CH₃O₂
8 0
3 years ago
0.7 L of H2 enters a reaction at standard temperature and pressure.
ASHA 777 [7]

Answer:

1.88 × 10²³ particles

Explanation:

Given data:

Volume of H₂ = 0.7 L

Number of particles at STP = ?

Solution:

First of all we will calculate the number of moles of H₂.

PV = nRT

n = PV / RT

n = 1 atm . 7 L / 0.0821 L. atm. mol⁻¹. k⁻¹ × 273.15 K

n = 7 atm. L / 22.43 L. atm. mol⁻¹

n = 0.312 mol

it is known that,

2 g H₂ = 1 mol = 6.022 × 10²³ particles

For 0.312 mol

              0.312 × 6.022 × 10²³ particles

                    1.88 × 10²³ particles

6 0
3 years ago
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