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Chemistry

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Josie Sporer

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Cards in this guide (10)
Express a numbers of scientific notation

how to express scientific notation to a simle number

What does a complete ionic equation look like

All ionic substances are written as separate ions in solution

What does the state symbol aq mean when written after a chemical compound in a chemical reaction

The state symbol aq means it dissolves in water when it is written after a chemical compound in a chemical reaction.

What is the percent composition of sulfur in SO2

32.1g

__________________

X100%

(32.1g + 16.0g + 16.0g)

What does it mean if something is insoluble

It will not dissolve in water.

What is the best definition of a physical change

Answer this question… Which of the following is the best definition of a physical change?

What is the complete ionic equation for h2so4aq cai2aq caso4s 2hiaq

For Apex: 2H+ + SO42- + Ca2+ +2I- -> CaSO4 + 2H+ + 2I-

How does one determine a molecular formula from the empirical form

molar mass of unknown/molar mass of empirial = # of empirical units in the molecular formula. Example: empirical formula is CH2O with a molar mass of 30. If the molar mass of the unknown is 180, then 180/30 = 6 and molecular formula will be C6H12O6

What represents the mass of 1 molecule of sh2

34.1 amu

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 molecules cal

Free radicals

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