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TEA [102]
4 years ago
15

PLEASE HURRY!!!! The diagram shows 2 identical charged particle. How does the potential energy and the force of repulsion change

s as the charges are brought closer together

Chemistry
1 answer:
pogonyaev4 years ago
5 0

Answer:

Please did you ever get an answer??

Explanation:

Im doing usa test prep too and its really late

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SnO2 is reduced by carbon according to this reaction: SnO2 + C ???? Sn + CO2. How many liters of CO2 are produced if 300.0 grams
andrew-mc [135]

Explanation:

The given reaction is as follows.

         SnO_{2} + C \rightarrow Sn + O_{2}

a).   Molar mass of SnO_{2} is [(mass of Sn) + (2 × mass of O)].

Therefore, molar mass of SnO_{2} = (118.7 + 2 × 16) g/mol = 150.7 g/mol

Since, it is known that number of moles equal mass divided by molar mass. So, moles of Sn will be calculated as follows.

               No. of moles = \frac{mass}{molar mass of SnO_{2}}

                                      = \frac{300 g}{150.7 g/mol}

                                      = 2.53 mol

As it is given that 1 mole of SnO_{2} produces 1 moles of Sn and 1 moles of CO_{2}. Hence, 2.53 moles of SnO_{2} will also produce 2.53 moles of Sn and 2.53 moles of CO_{2}.

Volume of 1 mole of CO_{2} at STP is 22.4 L. Therefore, volume of 2.53 moles of CO_{2} will be calculated as follows.

                  2.53 × 22.5 L = 56.67 L

Hence, 56.67 L of CO_{2} are produced if 300.0 grams of tin are produced at STP.

b).  Mass of tin is given as 1800.0 g. So, number of moles will be calculated as follows.

               No. of moles = \frac{mass}{molar mass of tin}

                                      = \frac{1800.0 g}{118.7 g/mol}

                                      = 15.2 moles

As 15.2 moles of SnO_{2} produces 15.2 moles of Sn. Therefore, weight of SnO_{2} will be calculated as follows.

                   Mass = no. of moles × molar mass of SnO_{2}

                             = 15.2 moles × 150.7 g/mol

                             = 2290.64 g

Hence, 2290.64 grams of SnO_{2} are required to produce 1800.0 grams of tin.

c).   Mass of carbon given is 100.0 grams.

             No. of moles = \frac{mass}{molar mass of carbon}

                                    = \frac{100 g}{12 g/mol}

                                      = 8.33 moles

As, 1 mole of carbon is produced by 1 mole of tin. So, 8.33 mole of carbon will be produced by 8.33 moles of tin.

Therefore, calculate mass of tin produced as follows.

                        Mass = no. of moles × molar mass of Sn

                             = 8.33 moles × 118.7 g/mol

                             = 988.8 g

Hence, 988.8 grams of tin will be produced per 100 grams of carbon used.

8 0
4 years ago
A hot plate, a large beaker of water, and grains of rice are used in a class demonstration. When the water begins to boil, the r
Mice21 [21]

Answer:radiation

Explanation:

When the water begins to boil the rice moves in a circular pattern which means radiation will be the correct answer

3 0
3 years ago
Natural vs. Synthetic
myrzilka [38]

Answer:

Natural chemicals are produced by nature without any human intervention. Synthetic chemicals are made by humans using methods different than those nature uses, and these chemical structures may or may not be found in nature. Stay safe .

8 0
3 years ago
Read 2 more answers
7th GRADE SCIENCE PLEASE HELP!! ​
liraira [26]
Natural Selection.
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Traits.
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Adaptation.
Species.
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Food.



Have a lovely day.

3 0
3 years ago
The semi-conductors on the periodic table are classified as
Mila [183]
Most likely the transition metals
4 0
4 years ago
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