Honors Chem Ch. 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| FORMULA FOR DENSITY | Mass / volume (y2-y1 / x2-x1)
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| PERCENT ERROR EQUATION | Actual - experimental / actual X 100
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| SIGNIFICANT DIGITS: multiplication and division | The # of significant digits in the end total is the same as the measurement with the smallest # of sig. digits
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| SIGNIFICANT DIGITS: addition and subtraction | If all #s have decimals, then the limiting term is the one with the smallest # of decimal places
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| SCIENTIFIC NOTATION: multiplication | Multiply coefficients, then add exponents
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| SCIENTIFIC NOTATION: division | Divide coefficients, then subtract exponents
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| ACCURACY | How close values are to an accepted value
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| PRECISION | How close values are to one another
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| CALCULATING CELCIUS | C= K-273
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| CALCULATING KELVIN | K= C+273
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| DERIVED UNITS | A combination of units (MPH, meters per sec)
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| DERIVED UNITS FOR DENSITY | g/cm cubed
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| A penny has a mass of 3.1g and a volume of .35mL. What is the density? | 3.1/0.35= 8.9 g/mL(3)
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| DIMENSIONAL ANALYSIS | Systematic way of converting units using conversion factors
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| CONVERSION FACTORS | Ratios of equivalent values (1hr/60min)(1y/365days)
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| ERROR | The difference between experimental and accepted values
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| YOU MUST HAVE THE SAME EXPONENT WHEN ___ OR ___ IN SCIENTIFIC NOTATION | Adding or subtracting
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| ADDITION | Add coefficients. Exponents must be the same.
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| SUBTRACTION | Subtract coefficients. Exponents must be the same.
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| MULTIPLICATION | Multiply coefficients; add exponents.
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| DIVISION | Divide coefficients; subtract exponents.
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| All non-___ numbers are significant. | Zero
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| Sandwiched zeros (zeros in ____ sig. digits)are significant. | Between
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| Zeros that are only _____ for a decimal are insignificant. | Placeholders
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| Zeros at the ___ of a number that also contains a ____ are significant. | End; decimal
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| Exact numbers have an ____ number of significant digits. | Infinite
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| 1 liter = ______ | 1 cubic decimeter (dm3)
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| EXPONENTS __ ___ HAVE TO BE THE SAME WHEN MULTIPLYING OR DIVIDING | Do not
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| WHEN THE DECIMAL MOVES TO THE LEFT, THE EXPONENT: | Goes up
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| WHEN THE DECIMAL MOVES TO THE RIGHT, THE EXPONENT: | Goes down
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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