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IceJOKER [234]
3 years ago
8

Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both

parts of the law of conservation of energy in your description.

Chemistry
2 answers:
dedylja [7]3 years ago
7 0
Rube Goldberg machines follows law of conservation of energy. In this machine when marble rolls down from top it has kinetic energy.
krek1111 [17]3 years ago
5 0
In this machine, a various instant kinetic energy is transferred into potential energy and vice-versa , so the total energy remain conserved. Thus Rube Goldberg machines follows law of conservation of energy. In this machine when marble rolls down from top it has kinetic energy.
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If 3.000g of k2co3 were used in this experiment (instead of khco3),
KiRa [710]

A. The balanced chemical equation is correct:

k2co3 + 2hcl --> 2kcl + co2 + h2o

 

B. First let us calculate the moles of K2CO3.

moles K2CO3 = 3 g / (138.205 g/mol) = 0.0217 mol

 

From the equation, we need 2 moles of HCl per 1 mole of K2CO3, hence:

moles HCl needed = 0.0217 mol * 2 = 0.0434 mol

 

So the volume required is:

volume HCl = 0.0434 mol / 6 M = 7.24 x 10^-3 L = 7.24 mL

 

C. The number of moles of HCl and KCl is equal hence:

moles KCl = 0.0434 mol

 

The molar mass of KCl is 74.5513 g/mol, so the mass is:

mass KCl = 0.0434 mol * 74.5513 g/mol = 3.24 grams

8 0
3 years ago
1. What causes the extreme differences in salinity in the intertidal zone?
son4ous [18]
1) during daylight, especially around noon, the relatively high air **temperature** and low humidity caused high evaporation, extracting pore water from the beach and leaving the **salt** behind, thereby resulting in high salinity near the beach surface (intertidal zone)

2) • algae and other intertidal plants grow in the abundant sunlight and support an entire food chain of animals
• constant wave action supplies the tide pool with **nutrients** and oxygen
• food is abundant
• a varied substrate provides hiding places and surfaces to cling to

3) the intertidal zone is one of a number of **marine** biomes or habitats, including: estuary (spray zone), neritic (lower/shallow zone), surface (middle zone), deep zones (high zones)
3 0
3 years ago
Anyone looking to talk. Or a friend?<br> I am bored so......
tia_tia [17]

Answer:

Hii

Explanation:

How are you?

4 0
3 years ago
Read 2 more answers
This set contains the spectra of benzil, biphenyl, and bibenzyl, three compounds used in the melting point experiment. Using you
murzikaleks [220]

Answer:

Spectrum 1- Biphenyl

Spectrum 2 - Benzil

Spectrum 3 - Bibenzyl

Explanation:

<u>For Benzil: </u>

<u> </u>The Spectrum -  2  shows this compound.The C=O and C-H bond stretching observed at following values.

C=O \,at\,1657cm^{-1}

C=H \,at\,3063cm^{-1}

<u> For Biphenyl: </u>

<u> </u>Spectrum -  1  shows this compound.

There are stretching vibrations from 3061, 3032\,and \,1597 -1428cm^{1} due to C-H stretching and C-C stretching respectively of aromatic ring only.

<u>For Bibenzyl: </u>

Spectrum - 3  shows this compound

There are stretching vibrations at 3057,3026 and 1598 - 1449cm^{-1} due to C-H stretching and C-C stretching of aromatic ring.

Along with this, stretching vibrations at 2943 - 2917 cm^{-1}due to C-H of alkyl.

8 0
4 years ago
Copper has two isotopes, copper-63 and copper-65. The relative abun-
Zolol [24]

Answer:

63.55 amu

Explanation:

(0.692 * 62.930) + (0.308 * 64.928) = 63.55 amu

Copper has two naturally occurring

isotopes: copper-63 (69.17%) and

copper-65 (30.83%).

Calculate the average atomic mass of

copper if the relative masses of the

isotope are copper 63 (62.93 amu)

and copper-65 (64.93 amu).

Cu-63 (0.6917 x 62.93 amu)

Cu-65 + (0.3083 x 64.93 amu)

Avg. mass = 63.55 amu

7 0
3 years ago
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