Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
CHEM TEST :)))
| Question | Answer |
|---|---|
| formula mass | ionic |
| molecular mass | covalent |
| molar mass | generic |
| % composition | element total mass/ compound total mass x 100 |
| empirical formula step 1 | g -> mol |
| empirical formula step 2 | divide by the smallest mole value |
| empirical formula step 3 | if needed, multiply by the whole number ratio |
| empirical formula step 4 | ratio becomes subscript formula |
| molecular formula step 1 | find empirical formula mass |
| molecular formula step 2 | molecular mass/ formula mass |
| molecular formula step 3 | multiply by the whole number ratio by empirical subscripts |
| molar mass | the mass of 1 mole of a substance |
| mole | 6.02 x 10^23 |
| representative particle | smallest unit of a substance that still has properties of that substance |
| formula mass | the total mass of the atoms in a chemical formula, add: atomic masses of each element |
| empirical formula | the whole number ratio of an atom |
| percent composition | percent by mass of each element |
| anhydrate | doesn't contain H20, also the same compound without the water, so instead of CuSO4 - 5H2O it is just CuSO4. Water is removed by heating which drives off the water molecules |
| molecular mass | total mass of all the atoms in one molecular of a substance add: atomic mass of each element |
| molecular formula | actual number of atoms in each element |
| avogrado's constant | 6.02 x 10^23 |
| molar volume | volume occupied by 1 mole of a substance (gas) at a given pressure or temp |
| hydrate | compound that has water molecules chemically bonded to its fixed ratio written with a dot followed by the number of water molecules. |
| if you have moles and you want the number of molecules you | multiply |
| Which of the following elements exists as a diatomic molecule? | nitrogen |
| The atomic masses of any two elements contain the same number of ____. | atoms |
| The lowest whole-number ratio of the elements in a compound is called the ____. | empirical formula |
| Which combination of temperature and pressure correctly describes standard temperature and pressure, STP? | 0oC and 101.3 kPa |
| The molar mass of a gas can be determined from which of the following? | the density of the gas at STP |
| For which of the following conversions does the value of the conversion factor depend upon the formula of the substance?` | mass of any substance to moles |
| steps: How many moles of CaBr2 are in 5.0 grams of CaBr2 | divide 5.0g by the mass of CaBr2 |
| steps: How many atoms are in 3.5 moles of arsenic atoms? | multiply 3.5 x 6.02x10^23 |
| To determine the formula of a new substance, one of the first steps is to find the ____. | percent composition |
Created by:
feltsann000