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Determine the new volume of a 1.3 L balloon if it is taken from room temperature that is twenty five degree celsius and placed into a freezer at the temperature of -11.5 degree celsius.?
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Match the reaction provided on the left with the correct reaction classification/type on the right [NOTE the reaction equations are not balanced] . Reaction classification/types can be used more than once or not at al ...
A student finds that the mass of an object is 6.62 kg. She is told that her measurement has an error of 12.3%. What is the true mass (in kg) of the object?
Titrate the base trimethylamine (TMA) with 0.126 M HCl. (CH) 3 N(aq) + H 2 O(l) (CH 3 ) 3 NH+(aq) + OH-(aq) Kb = 6.45 x 10 -5 There are 0.00615 moles of TMA in 42.5 mL H 2 O before titration begins. What percent of TMA i ...
How much will the temperature change when 3.0 g of tooth enamel (specific heat = 0.18 cal/g C) absorbs 0.80 cal of heat energy?
A Nutrition Facts label on a food package indicates that one serving contains 2% of the recommended daily allowance (RDA) of iodine. If the serving size is one cup and the RDA for iodine is 0.15 mg per day, calculate the ...
When the concentration of A in areaction was changed from 1.20 M to 0.600M, the half -lifeincreased from 3-00min to 6.0 min at 250C. Calculate theorder of reaction and the rate constant.
A 42.60 gram sample of a hydrate of BaI 2 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heating, 39.01 grams of the dehydrated compound remained. What is the formula of th ...
H 2 (g) + I 2 (g) = 2HI Temperature = 731 K If 1.60 mol H 2 and 4.20 mol I 2 areplaced in a 1.08 L vessel What is the equilibrium concentration of H 2 in the gaseous mixture? The equilibrium constant is K = 49.7
Vinegar is an aqueous solution of acetic acid CH3OOH. A10 mL sample of a particular vinegar requires 31.45 mL of 0.2560 Mof KOH for its titration. What is the molarity of acetic acid in vinegar?
A chemistry lab experiment requires 67.4 grams of silvernitrate. How many grams of a 15.5% by mass solution of silvernitrate should be used?
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