CHEMISTRY HIGH SCHOOL

Calculate how much gasoline and money could be saved if the automobile's fuel efficiency were increased by 25%.Gasoline = 25 gallons per week
Money = $2 per gallon ($50 total)

Answers

Answer 1
Answer: In the question it is already given the amount of actual gasoline and money consumed before the fuel efficiency gets increased by 25%
Gasoline consumption before the increase in fuel efficiency = 25 gallons per week
Gasoline saved after the increase in fuel efficiency = [25 * (25/100)] gallons per week
                                                                                             = 6.25 gallons per week
So every week 6.25 gallons of gasoline can be saved after increasing the efficiency of the automobile by 25%.
Then
The amount of money saved against the 6.25 gallons of gasoline saved = (6.25 * 2) dollars
                                                                                                                   = 12.50 dollars
The amount of money saved is $12.50 per week.

Related Questions

A base has Kb of 2.5 x 10-11. which of the following statements is true?(1 point)a) this is a concentrated base b)this base ionizes slightly in a aqueous solution c)this is a strong base d)an aqueous solution of this base would be acidic I'm thinking b. help and i'll give medal. Thank you
What would be the best way to measure Carbon Dioxide in a Soft Drink can?And yes, we were going to do it by taste.
the reaction below shows how silver chloride can be synthesized. agno3 nacl nano3 agcl how many moles of silver chloride are produced from 15.0 mol of silver nitrate?
Which of the following best describes how chemical changes differ from physical changes?A. Physical changes produce no new substances and chemical changes do.B. Physical changes always involve the formation of a gas while chemical changes may not.C. Physical changes can occur inside or outside the substance; chemical changes always occur outside.D. Physical changes involve a change of state; chemical changes involve a change of shape.
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At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)A) at 298 K
B) at 100 K
C) It is spontaneous at any temperature.
D) It is not spontaneous at any temperature.

Answers

Answer:

D) It is not spontaneous at any temperature.

Explanation:

Given reaction:

CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)

ΔH = +8.91*10³ J

ΔS = -219.20 J/K

The sign of the Gibbs free energy (ΔG) determines the spontaneity of a given reaction. ΔG is related to ΔH and ΔS as follows:

\Delta G = \Delta H-T\Delta S

A reaction is spontaneous only when ΔG is negative i.e. ΔG < 0

Under the given conditions:

ΔH > 0 ; ΔS <0 and ΔH > ΔS

i.e. ΔG = ('+' value) - T( '- 'value) = + value

Therefore, irrespective of the temperature, ΔG will always be positive
DG = DH - TDS 

For this reaction DH>0 and DS<0. So, d. the reaction is not spontaneous at any temperature.

The functional group in an alcohol is the _____ group.

Answers

Answer is: hydroxyl group (-OH).

A functional group is a group of atoms that determines many of the properties of an organic molecule.

Functional group for alcohol is hydroxyl group or hydroxy group (-OH).

In organic chemistry, alcohol and carboxylic acids contain hydroxy groups.

The atoms of functional groups are linked to each other and to the rest of the molecule with covalent bonds.
The functional group in Alcohol is the Hydroxyl group.

Why is ice cream a mixture

Answers


Ice is a mixture and it can be a compound at the same time. A mixture is when you have to substance's put together fro example you can mix salt and sugar together. But a compound is when two different elements or molecules are combined. Ice cream is a mixture or cream and sugar mainly.
ice cream are a mixture because they are a mix of two different things like milk, salt and other ingrediants used to make ice cream.

Determine the mass 2 mol Li??

Answers

You can look on the periodic table for the number of automic mass units in each element. 

1 mole Li = 6.94 amu
6.94 • 2 = 13.9 amu

There are 13.9 amu in 2 moles of Li
Molar mass Li = 6.94 g/mol

1 mol --------- 6.94 g
2 mol --------- ?

Mass Li = 2 * 6.94 / 1

Mass Li = 13.88 g

hope this helps!

How many grams of potassium chloride are produced if 25g of potassium chlorate decompose.

Answers

Answer:15 g KCl

Explanation: 2KClO3->2KCI+3O2

Answer:

2.05

Explanation:

Greenhouse gases absorb radiation from the

Answers

Greenhouse gases in the atmosphere contains gases which absorbs heat. These gases are carbon dioxide, methane, ozone, water vapor and nitrous oxide. While these gases are absorbing heat, they are at the same time also emitting infrared radiation which warms the planet.

Answer:

Earth's surface

Explanation:

Most abundant green houses gases in earth's atmosphere are:

water vapour, carbon dioxide, nitrous oxide, methane, ozone and chlorofluoro carbon.

Green house gases are required to maintain earth's average temperature.

Without greenhouse gases, the average temperature of Earth's surface may fall to−18 °C.

Green houses gases trap the thermal infrared raditaion emitted from the earth's surface and keep the earth warm in order to sustain life.

So, greenhouse gases absorb radiation from the earth's surface.
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