Chemistry, 05.12.2020 22:40 Leonardo8366
1. A student performing this experiment records a volume of 175 mL at a barometric pressure of
755 torr and 93 ºC. Using the ideal Gas Law, calculate the number of moles of vapor in the flask
under these conditions. Let R = 0.0821 L-atm/mol-K and perform all necessary conversions
before calculating.
Answers: 2
Chemistry, 22.06.2019 02:00
In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 16:00
If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml
Answers: 1
1. A student performing this experiment records a volume of 175 mL at a barometric pressure of
755...
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