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3 questions! 1. Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42- 2.Enter the expression 147N+α, where α is the lowercase Greek letter alpha. 3.Enter the chemical equation 2H+(aq)+S2-(aq)→H2S(g). Express your answer as a chemical equation.
A solution contains 0.021 M Cl? and 0.017 M I?. A solution containing copper (I) ions is added to selectively precipitate one of the ions. At what concentration of copper (I) ion will a precipitate begin to form? What is the identity of t..
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
Draw the configurational isomers of 1-bromo-4-methylcyclohexane. (b) Draw the conformational isomers of the structures drawn in (a).
Using a sample of water with a mass of 46.0 grams at a temperature of -58. Degree Celsius calculates how many Joules of energy (E) are necessary to heat the ice to 0 degree Celsius. Specific heat of ice= 2.1 J/g C).
hot methanol and then stored the recrystallization solution until the next lab period. What possible effect on your results due to this experimental error could take place?
the pH of a 0.20 M solution of a weak monoprotic acid is 3.70. What is the value of the ionization constant
The temperature in the laboratory was 25°C, and the barometric pressure was 740 mmHg. At 25°C, the vapor pressure of water is 23.8 mmHg. Calculate the equivalent mass, EM, of the unknown metal anode. The student was told the metal was oxidized to ..
A rectangular block of plastic, measuring 1.34 cm by 2.27 cm by 1.39 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 3.35 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
Small samples of oxygen gas needed in the laboratory can be generated by any number of simple chemical reactions, such as 2KClO3(s) 2 KCl(s) + 3 O2(g) According to this balanced chemical equation, how many moles of oxygen gas are produced from the..
Consider the titration of 30.0mL of 0.050M NH3 with 0.025M HCl. Calculate the pH after the following volumes of titrate have added.
A 320. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 59°C?
What is the gas pressure (in atm) inside a 1.89-L bulb that contains 1.56-g of Ne at a temperature of 21.1 C? Be sure to report the units as atm
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