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Marat540 [252]
2 years ago
11

A nearly complete skeleton, ____ is a classic example of a Neanderthal with many defining Neanderthal characteristics. Group of

answer choices Taung Child La Ferrassie 1 Piltdown Man KNM-ER 1805
Chemistry
1 answer:
Ostrovityanka [42]2 years ago
4 0

Answer:  La Ferrassie 1

Explanation: La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found.

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Which of these statements explains the relationship among elements, compounds, and mixtures? A. Elements are made of compounds a
sweet-ann [11.9K]
The answer is answer D
5 0
3 years ago
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A chemist prepares a solution of aluminum sulfate Al2SO43 by weighing out 101.g of aluminum sulfate into a 200.mL volumetric fla
qaws [65]

Answer:

50.5 g/dL

Explanation:

From the question given above, the following data were obtained:

Mass of Al₂(SO₄)₃ = 101 g

Volume (V) = 200 mL

Concentration of solution (g/dL) =?

Next, we shall convert 200 mL to decilitre (dL).

This is illustrated below:

1 mL = 0.01 dL

Therefore,

200 mL = 200 mL / 1 mL × 0.01 dL

200 mL = 2 dL

Therefore, 200 mL is equivalent to 2 dL.

Finally, we shall determine the concentration of the solution in g/dL as follow:

Mass of Al₂(SO₄)₃ = 101 g

Volume (V) = 2 dL

Concentration of solution (g/dL) =?

Concentration of solution (g/dL) = mass /volume

Concentration of solution (g/dL) = 101/2

= 50.5 g/dL

Therefore, the concentration of the Al₂(SO₄)₃ solution is 50.5 g/dL

8 0
4 years ago
one parsec equals 3.26 light years, where a light year is the distance light travels in one year. if the speed of light is 18600
Tpy6a [65]
Parsec is a unit of distance (as stated 1 Parsec = 3.26 light years, wihch is 3.26 times the distance run by light in one year).

That distance is:

1 parsec = 3.26 mi× 186,000 mi/s × 3600 s/h × 24 h/day × 365 day/ year × 1 year = 19,122,168,960,000.mi.

So, the question of <span>how many parsecs it takes for light to reach Mars from Earth does not make sense because parsecs is not a unit of time.
</span><span>
</span><span>
</span><span>You can calculate how many parsecs is equivalent to the distance between Mars and Earth, 60,000,000 km. For this you can first calculate the  equivalence of which you do in this way:
</span><span>
</span><span>
</span><span>60,000,000 km × 0,621 mi/km  × 1 parsec / ( 19,122,168,960,000 mi) = 1.94E-6 parsecs.
</span><span>
</span><span>
</span>

<span />

7 0
3 years ago
What is the molarity if 6664 grams of boron iodide is dissolved in 5.25 liters of water?
Virty [35]

Answer:

3.24 mol/L

Explanation:

Given that:

mass of Boron triiodide = 6664 grams

molar mass of BI_3 = 391.52 g/mol

Recall that:

number of moles = mass/molar mass

∴

number of moles = 6664 g /391.52 g/mol

number of moles = 17.02 mol

Also;

Molarity = moles for solute/liter for solution

= 17.02 mol/5.25 L

= 3.24 mol/L

4 0
3 years ago
The radioactive decay of thorium-232 occurs in multiple steps, called a radioactive decay chain. The second product produced in
DaniilM [7]

Answer:

A. Alpha decay followed by emission

Explanation:

The given nuclide is  thorium-232

The product formed in the decay of  thorium-232 is actinium -228

^{232}_{90}Th\Rightarrow ^{228}_{89}Ac

the difference between the atomic number is 1 (90-89)

the difference between the mass number is 1 (232-228)

A decrease in mass number by 4 and atomic number by 2 indicates an alpha decay.

^{232}_{90}Th\Rightarrow ^{228}_{88}Ra+ ^{4}_{2}He

now to get ^{228}_{89}Ac from ^{228}_{88}Ra, Radium undergoes beta emission to increase the atomic number by 1 and no change in the mass number.

^{228}_{88}Ra\Rightarrow ^{228}_{89}Ac+ ^{0}_{-1}e

Thus alpha decay followed by beta emission gives Ac-228

hence option A is correct

8 0
3 years ago
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