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Chemistry

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Ben Pouros

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Cards in this guide (15)
What does the average atomic mass represent

The average atomic mass represents the weighted average of the masses of the isotopes of the element.

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

How do scientists design a system

They isolate their experiment from unwanted influences.

How is stoichiometry used to calculate the amount of product produced

Stoichiometry relates moles of reactant to moles of product, so if you have the amount of reactant in the equation, you can calculate the amount of product produced.

Why do scientists define systems

It minimizes sources of bias in the data.

What did organizing information on the periodic table reveal

Periodic patterns and trends

What happens to the anode in an electrochemical cell

it loses mass

How does the activity series of metals reflect the stability of metals

The metals highest on the list are the least stable.

Which is the least likely to be reduced

Mg2+

What characteristics indicates that an atom is unstable

by creating very strong bonds

Which statements accurately describe the culture or geography of Latin America

honky

All life on earth is ultimately dependent on what

The sun for energy

What is the voltage of galvanic cell made with magnesium (Mg) and gold (Au)

4.2V

If an element has three isotopes with known masses what information is needed to find the average atomic mass of the element

The abundance percentage of each isotope

Which of the following statements describes electromagnetism

Magnetism can create electricity, and electricity can create magnetism.

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