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Problem- A concentration of 1ppm of fluorine is sufficient for the purpose (1ppm means one part per million, or 1g of fluorine per 1 million g of water). Calculate the quantity of sodium fluoride in kilograms needed per year for a city of 50,000 people if the daily consumption of water per person is 165 gallons. (Sodium fluoride is 45% fluorine by mass. 1 gallon=3.79L; 1 ton= 2000lb; 1lb=453.6g; density of water =1g/mL
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Compute the half-life (in s) of a first-order reaction if the concentration of the reactant is 0.0541 M 27.6 s after the reaction starts as well as is 0.0106 M 40.4 s after the reaction starts.
a 130g piece of metal is heated to 286C and dropped into 87.0g of water at 26C, if the final temperature of the water is 58.3C.
sample of aluminum chloride increased in temperature by 3.5 k when the sample absorbed 167 j of energy. calculate the
^188 W decays by first order with a rate constant of 1.00 x 10^-2 d^-1. How long will it take for 93% of the initial amount of the reactant to be consumed
Bessemer converter is used for the manufacture of : Which is the formula of Haematite
what is the enthalpy change for converting 1.00 mol of ice at -50.0degc to water at 70.0degc? the specific heats of ice
A sample of oxygen gas is collected over water at 23ºC at a barometric pressure of 751 mmHg (the vapor pressure of water at 23C = 21mmHg). What is the partial pressure of oxygen gas in the sample
1. if 12.26l of gas a reacts according to the following equation 2ag3bgagrave9c g 6dgwhat volumes of gases c and d are
Define when 14.4g of carbon were burned in the presence of 55.1g of oxygen, 16.7g of oxygen remained un-reacted. Explain what mass of carbon dioxide was produced
Question- First determines if there is a reaction in each of the following cases. If there is, write the products, including their physical states. It is not necessary to balance the equations. Also if there is no reaction, just write "NR".
Problem- Explain on a molecular level, how soaps accomplish cleaning in aqueous solution. Be specific and use appropriate terminology.
Propane and Methane are other hydrocarbon fuels. If a 1000 g sample of each of these compressed gases was taken on a camping trip which one would contain the larger number of moles. Show a calculation to support your answer.
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