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Chemistry

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Carlee Ferry

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Cards in this guide (16)
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 is the general form of a synthesis reaction

A+B ➝AB

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

How much mass does 1 mol of o2 gas have

15.99 x 2 g

How do reactants and products participate in a chemical reaction

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

What is the molarity of 4 mol of NaOH dissolved in 2 L of water

2 m

Why is it useful to express a number in scientific notation

It can shorten the expression into a number that can more easily be understood by giving an order of magnitude to the number. For example, would you write 0.00000000000000000045 or would you write 4.5 X10-19.

What kind of reaction is 2C2H6 7O2 g 4CO2 6H2O

A combustion reaction

What is the oxidizing agent in the reaction Fe AgNO3 FeNO33 Ag

AgNO3 #APEX

What elements have the highest and lowest ionization energy

Helium has the highest first ionization energy and francium has the lowest first ionization energy.

All life on earth is ultimately dependent on what

The sun for energy

When food is exposed to air it can lose electrons. This loss of electrons creates reactive molecules that work to destroy the chemical bonds in the food causing it to spoil. What are these reactive mo

Free radicals

How would 0.000000728 be written in scientific notation

It is 7.28*10^-7 in scientific notation

How is the mass of 1 mole of an element determined

It is the same as the element’s atomic mass, but in grams.

The only reactants in a reaction were Zn and HCI. What does the law of conservation of matter say about the products

The product will contain only Zn, H, and CI. -Apex

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