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Chemistry

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Carmelo Hoeger

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Cards in this guide (20)
How is electroplating done

the metal on which electroplating is to be done is taken as cathode ( negative electrode) . the metal of which electroplating is to be done is taken as anode ( positive electrode) and the salt solution of the metal of which electroplating is to be done is taken as electrolyte .

example-

if we want to electroplate iron with copper then iron is taken as cathode and copper is taken as anode and electrolyte is copper sulphate.Electroplating is the process of plating one metal onto another by hydrolysis, most commonly for decorative purposes. This is done through the use of copper in a copper sulfate bath.

List three services that ecosystems provide

There are a great many services that ecosystems can provide. These services include shelter, food, and mates to reproduce with.

Does the arctic tundra cover most of the earths land

No, it doesnt cover up most of the land.

What is the correct sequence of steps in the four stroke engine cycle

air and fuel intake, compression and ignition, combustion and expansion, exhaust

What is a molecule containing only carbon and hydrogen called

A hydrocarbon-apex

What would be the percent yield of the reaction be if the theoretical yield is 11.22 g but the actual yield was 8.67 g

In this case the yield is 77,27 %.

What does not benefit of using biofuel instead of fossil fuels

Fossil fuel may be used in the production of biofuels.

Which the following is a necessary product of a combustion reaction

heat

For his truck Joel purchases gasoline to which oxygen has not been added. What might be the result

The engine will produce more exhaust.

If a reaction starts with 4 Cu atoms 5 O atoms and 10 H atoms what is known about the products

The product will contain 4Cu atoms, 5 O atoms, and 10 H atoms.

Generating energy through combustion of renewable biofuels that cause minimal harm to the environment is an example of

Green Design

The chemical reaction that occurs when gasoline and air are ignited is called an

Combustion reaction

(Apex)

Hydrogen-powered cars create less pollution than gasoline-powered cars when driven. What might be a challenge to using hydrogen as a fuel

Challenges to hydrogen as fuel include no distribution network, ie gas stations, and fear that the car co u l d explode like the Hindenburg.

In which step of the four-stroke engine cycle does the spark plug initiate the combustion reaction

compression and ignition

What is a benefit of using technology to transport water

cities can be built in otherwise uninhabitable places

Which of the following is a benefit of using dams as a source of freshwater

dams help control floodwater

What is the main use of freshwater worldwide

Irrigation

How does land use change as the human population increases

grassland are used for cropland

What is the challenges poses the biggest problem to the long term use of alternative fuels

Electric engines may ultimately rely on fossil fuels for power.

Is not a concern regarding the use of corn as a biofuel

The color of corn is different than the color of gasoline or coal

APEX

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