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Chemistry

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Laury Homenick

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2y ago
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Cards in this guide (12)
What is a molecular formula

The molecular formula specifies the actual number of atoms of each element in a molecule.

What information does a solubility table give

it tells which compounds will dissolve in water

What is the mass percent composition of an element in a molecule

Percentage composition= (mass of the element/mass of the molecule)*100

The fraction of the molecule's mass that comes from the element's mass

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

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

How do reactants and products participate in a chemical reaction

the reactants are compounds that react to form new compounds , the products

What happens when a molecule combusts

Combines with oxygen

Which of the following combustion reactions is balanced correctly

The correct answer is: C5H12 + 8O2 5CO2 + 6H2O.

What does not benefit of using biofuel instead of fossil fuels

Fossil fuel may be used in the production of biofuels.

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

The engine will produce more exhaust.

Air and fuel intake compression and ignition combustion and expansion and exhaust are sequential steps in

The four-stroke engine cycle.

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.

After driving in stop-and-go traffic in his new hybrid Jesse notices that his car battery's power level has increased. What could be a possible explanation

each time jesse hits his breaks, the saved energy was stored in the battery -apex

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