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[DOC File]ppm worksheet - Oswego Community Unit School District 308
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PARTS PER MILLION WORKSHEET (key) 1. 25 grams of a chemical is dissolved in 75 grams of water. a. What is the concentration of the chemical in parts per hundred (pph)? __25__ X 100 = 25 pph (25+75) b. What is the concentration of the chemical in parts per thousand (ppt)? __25__ X 1000 = 250 ppt (25+75) c. What is the % of solute in this solution?
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[DOC File]Abbreviations and Nomenclature
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ppm parts per million s or sec second tonne metric tonne (mass equal to 1,000 kilograms) W/m•K Watt per meter times degrees Kelvin wt % weight percent ‰ parts per thousand 1 1 . Title: Abbreviations and Nomenclature Author: Bill/Winters User Last modified by: John …
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Since January 1993, the Massachusetts Department of Public ...
MMA has been found to be irritating at air concentrations below 50 ppm (parts per million) measured as an 8 hr time weighted average (TWA). This is much lower than the OSHA permissible exposure limit (PEL) which is 100 ppm measured as an 8-hr TWA.
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[DOC File]Missouri Secretary of State
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(A) The uncertainty due to random errors of any dimension of direction or distance shown on the plat shall not exceed one hundred parts per million (100 ppm) or one tenth of a foot (0.10') for distances less than one thousand feet (1,000') at the sixty-eight percent (68%) confidence level (one (1) sigma).
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[DOC File]WATER UNIT SECTION C Reading Guide
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(parts per hundred) ppt (parts per thousand) ppm (parts per million) PERCENT SOLUTION = ( g solute / g solution) x 100. a) Another way to tell the concentration of a solution is by using percentage. What would be the % concentration. of a solution containing 10 grams of salt dissolved in 90 grams of water? What would the concentration be in
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KEY TO UNITS
K/uL thousand per microliter. L liter (g/g micrograms per gram (g microgram (g/24 hrs micrograms per 24 hours (g/dL micrograms per deciliter ... ppm parts per million % percent. pg pictogram. pg/mL picograms per milliliter. sec second. SD standard deviation. Tho/mm3 thousands per …
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[DOC File]Solutions and Dilutions
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Low concentrations: Parts per thousand (ppt), parts per million (ppm), parts per billion (ppb) are convenient units for expression concentrations especially for extremely dilute solutions, for example, in expressing the concentrations of trace chemicals, particularly pollutants and toxic chemicals in …
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[DOC File]Name:_____________________________
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2. SALINITY - Expected Range: ~40 ppm in freshwater section up to 30,000 ppm (30 ppt) in harbor. Measures the amount of salts in the river. The listed instruments measure salinity in ‘parts per million’ (ppm) in the fresher sections and ‘parts per thousand’ (ppt) in …
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[DOC File]ppm worksheet
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PARTS PER MILLION WORKSHEET. 1. 25 grams of a chemical is dissolved in 75 grams of water. a. What is the concentration of the chemical in parts per hundred (pph)? b. What is the concentration of the chemical in parts per thousand (ppt)? c. What is the % of solute in this solution? 2. Suppose 17 grams of sucrose is dissolved in 183 grams of water.
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[DOC File]ATMOSPHERIC CHEMISTRY – Composition of the Atmosphere
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ppm – parts per million: 10-6. ppb – parts per billion: 10-9. ppt – parts per trillion: 10-12 – not to be confused with parts per thousand. For example, Current CO2 levels have increased from a pre-industrial level of 280 ppm to a present level of 385 ppm. At 925 mb and 20 °C, what was the pre-industrial molar concentration?
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Ppm to parts per thousand