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Chemistry

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Viva Bashirian

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Cards in this guide (18)
What is a molecular formula

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

Calculate the number of atoms of O contained in 16.0 pounds of O

16.0 lbs = 7,257 g of O2

Oxygen exists in the gas form as 02

7,257g O2 * 1 mol O2/ 32 g * 2 mol O / 1 mol O2 * 6.022x10^23 atoms/mol

= 2.73E26 atoms of O

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 are the oxidation states of the atoms in a diatomic gas

the oxidation states are always 0 for both atoms

What is the molar mass of H2CO3

62

How many ounces is 68 g

2.4 oz

How does the activity series of metals tell which reactions will occur

Metals higher in the series will replace metal ions in solution that are lower in the series

What occurs when a molecule combines with oxygen and produces heat

The oxidation reaction is called combustion : the material may burn or explode.

What reactions would be predicted by the activity series list

A metal replaces a metallic ion below it on the list. Apex

What is the molecular formula of the compound CH with molar mass 42.0

c3h6-apex

What is a following is a decomposition reaction

CaCO3 -> CaO + CO2

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

The engine will produce more exhaust.

Best describes where cellular respiration occurs

In every body cell -apex

If the products of a reaction are NaCl and H2O what does the law of conservation of mass reveal about the reactants in the reaction

The reactants will have one Na, one Cl, one O, and two H atoms

In which step of the four stroke engine cycle does the heat from the combustion reaction cause the pistons to move

combustion and expansion

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.

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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