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3 years ago

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Write a CER to explain what happened to this styrofoam head. The pics are of the head above water, at a depth of 1000m underwate

r, and at 3000 m underwater. Talk about the gas laws and/or KMT in your reasoning section!

1 answer:

statuscvo [17]3 years ago

4 0

Answer:

what is that i connot understand your question

Explanation:

im sorry i connot answer your question

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Why h2o has higher boiling point than nh3

Hoochie [10]

Answer:

H2O molecules are thus able to form an average of 4 H-bonds. H2O has a higher boiling point than NH3 because (i) the H-bonds are stronger and (ii) it contains twice as many H-bonds. H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker.

Explanation:

hope this is helpful

4 0

3 years ago

The arsenic in a 1.223 g sample of a pesticide was converted to H3AsO4 by suitable treatment. The acid was then neutralized, and

Vladimir79 [104]

Answer:

5.471% As₂O₃ in the sample.

Explanation:

<em>...the reaction is: Ag+ + SCN- => AgSCN(s) Calculate the percent As2O3 in the sample. (F.W. As2O3 = 197.84 g/mol).</em>

<em />

First, with the amount of KSCN we can find the moles of Ag in the filtrates. As we know the amount of Ag added we can know the precipitate of Ag and the moles of AsO₄ = 1/2 moles of As₂O₃ in the sample:

<em>Moles KSCN = Moles Ag⁺ in the filtrate:</em>

0.01127L * (0.100mol / L)= 0.001127moles Ag⁺

<em>Total moles Ag⁺:</em>

0.0400L * (0.0781mol/L) = 0.0031564 moles Ag⁺

<em>Moles of Ag⁺ in the precipitate:</em>

0.0031564 - 0.001127 = 0.0020294 moles Ag⁺

<em>Moles AsO₄ = Moles As:</em>

0.0020294 moles Ag⁺ * (1mol As / 3 moles Ag⁺) = 6.765x10⁻⁴ moles AsO₄

<em>Moles As₂O₃:</em>

6.765x10⁻⁴ moles AsO₄ * (1 mol As₂O₃ / 2 mol AsO₄) =

3.382x10⁻⁴ moles As₂O₃

<em>Mass As₂O₃:</em>

3.382x10⁻⁴ moles As₂O₃ * (197.84g/mol) = 0.0669g As₂O₃

Percent is:

0.0669g As₂O₃ / 1.223g sample * 100 =

<h3>5.471% As₂O₃ in the sample</h3>

<em />

7 0

4 years ago

A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. Which is the symbol of t

Alina [70]

The mass number goes on top, and the atomic number goes on bottom.
Therefore, the answer is C:
40
K
19

7 0

4 years ago

Read 2 more answers

How have chemists affected our world for good?

RideAnS [48]

Answer: i think the answer is

C. Chemists have learned how dangerous chemicals can be

Explanation:

8 0

4 years ago

Read 2 more answers

Given the density of iron (Fe) is 7.87 g/cm3, determine the mass of iron (in grams) in a rectangle block with the dimensions of

guapka [62]

Answer:

$m=14,105.71 g Fe$

Explanation:

Hello,

In this case, the first step is to compute the volume of the block considering the length, height and width:

$V=L \times W \times H =12.5 in\times 3.50 in \times 2.50 in =109.375 in^3$

Then, we compute the volume in cubic centimetres:

$V=109.375in^3\times \frac{16.3871 cm^3}{1in^3} =1792.34cm^3$

Finally, as the density is given by:

$\rho =\frac{m}{V}$

We solve for the mass:

$m=\rho \times V= 7.87\frac{g}{cm^3} \times 1792.34 cm^3\\\\m=14,105.71 g Fe$

Best regards.

8 0

3 years ago