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3 years ago

At which of the following temperatures does all molecular motion stop

1 answer:

3 0

All molecular motion stop at 0 k wich is zero kelvin. At absolute 0 it stops. The temperature of 0 entropy at which all molecular motion stops equals in centigrades to -273.15° C which is the same as 0 in kelvin degrees. Have in mind that temperature is a measure of the average kinetic energy of the molecules in a material.

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How likely is it that a scientific theory is correct?

yan [13]

It all depends what theory it is most are supported by really good evidence but they just don't have all the evidence so it can't be proven a fact at that time

5 0

3 years ago

A scooter maintains a pace of 1.45 minutes per mile, with fuel economy of 85 miles per gallon. How many seconds can it travel on

vlada-n [284]

Answer:

281s

Explanation:

Given parameters:

Speed of the scooter = 1.45min per mile

Fuel economy of engine = 85miles per gallon

Quantity of fuel = 145mL

Unknown:

Time of travel with the volume of fuel given = ?

Solution:

To solve this problem, we need to find the distance the fuel will last.

Rate of fuel consumption by the engine = 85miles per gallon

Convert 145mL to gallons;

3785.41mL = 1 gallon

145mL will therefore give $\frac{145}{3785.41}$ = 0.038gallons

So;

Distance covered = 85miles per gallon x 0.038gallons = 3.23miles

From;

Rate of travel = $\frac{time }{distance}$

Time = rate of travel x distance = 1.45 minutes per mile x 3.23miles

Time = 4.7min

1 min = 60s

4.7min = 4.7 x 60 = 281s

6 0

2 years ago

Do all atoms only have one oxidation state

MA_775_DIABLO [31]

I believe so! If not tell me So I can delete this

4 0

2 years ago

Read 2 more answers

A chemical company makes two brands of antifreeze. the first brand is 70% pure antifreeze, and the second brand is 95% pure anti

madreJ [45]

Answer is: 56 gallons of 70% antifreeze and 84 gallons of 95% antifreeze.

ω₁ = 70% ÷ 100% = 0.7; 70% pure antifreeze.

ω₂ = 95% ÷ 100% = 0.95.

ω₃ = 85% ÷ 100% = 0.85.
V₁ = ?; volume of 70% antifreeze.

V₂ = ?; volume of 95% antifreeze.
V₃ = V₁ + V₂.
V₃ = 140 gal.

V₁ = 140 gal - V₂.
ω₁ · V₁ + ω₂ ·V₂ = ω₃ · V₃.

0.70 · (140 gal - V₂) + 0.95 · V₂ = 0.85 · 140 gal.

98 gal - 0.7V₂ + 0.95V₂ = 119 gal.

0.25V₂ = 21 gal.

V₂ = 21 gal ÷ 0.25.

V₂ = 84 gal.

V₁ = 140 gal - 84 gal.

V₁ = 56 gal.

4 0

3 years ago

2H2S + 3O2 2SO2 + 2H2O Which option gives the correct mole ratios? H2S:SO2 = 2:2 and O2:H2O = 3:2 H2S:SO2 = 2:3 and O2:H2O = 3:2

UkoKoshka [18]

Correct Answer: Option (A)

H₂S : SO₂ = 2:2 and,

O₂: H₂O = 3:2

Explanation:

The mole ratio is the ratio of coefficients of the compounds involved in the reaction. Reactants, as on the left hand side of the chemical reaction which reach to form new products.

In the given reaction,

2H₂S + 3O₂ ⇒ 2SO₂ + 2H₂O

The reactants are : H₂S (hydrogen sulphide) & O₂ (oxygen)

The products are : SO₂ (sulphur dioxide) & H₂O (water)

2 moles of hydrogen sulphide react with 3 moles of oxygen
2 moles of sulphur dioxide & 2 moles of water are produced

Therefore correct option is

H₂S : SO₂ = 2:2 and,

O₂: H₂O = 3:2

7 0

2 years ago