The incomplete table below shows selected characteristics of gas laws. Name Variables Constants Equation ? ? ? cap p sub 1 cap v sub 1 is equal to cap p sub 2 cap v sub 2 Charles’s law ? ? the fraction with numerator cap v sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap v sub 2 and denominator cap t sub 2 ? temperature, pressure ? the fraction with numerator cap p sub 1 and denominator cap t sub 1 is equal to the fraction with numerator cap p sub 2 and denominator cap t sub 2 Combined gas law pressure, temperature, volume ? ? Which constants would most likely be filled in the first row of the table?
A chemistry journal requires that all new research papers be peer reviewed by other scientists before they are published. This allows which of these?
Which is the formula mass of Na sub 2 SO sub 4 ?
Water is dissolved into n - butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n - butanol?
The chemical equation shows the combustion of methane open paren CH sub 4 close paren CH sub 4 plus 2 cap o sub 2 rightarrow CO sub 2 plus 2 cap h sub 2 cap o The molar mass of oxygen gas open paren cap o sub 2 close paren is 32 point 0 0 g over mol The molar mass of carbon dioxide open paren CO sub 2 close paren is 44 point 0 1 g over mol What mass of CO sub 2 , in grams, will form when 8 point 9 4 g cap o sub 2 completely react?
Consider the combustion reaction, 2 cap c sub 2 cap h sub 2 g plus 5 cap o sub 2 g rightarrow 4 CO sub 2 g plus 2 cap h sub 2 cap o g where cap c sub 2 cap h sub 2 , ΔH_f=227.4kJ/mol , CO sub 2 , ΔH_f=−393.5kJ/mol , and cap h sub 2 cap o , ΔH_f=−241.82kJ/mol What is the enthalpy of the reaction? Use ΔH_rxn=∑(ΔH_f_1products)−∑(ΔH_f_1reactants)
The molar mass of NaOH is 40 point 0 0 g/mol If 5 point 2 0 g NaOH are dissolved in 0 point 5 0 0 liters of solution, what is the molarity of the solution? Use molarity is equal to moles of solute over liters of solution
What does the symbol open paren negative triangle cap h sub fus close paren indicate in a phase change?
A sample of an unknown substance has a mass of 0 point 1 5 8 kilograms If 2 comma 510 point 0 cap j of heat is required to heat the substance from 32 point 0 times degree C to 61 point 0 times degree C , what is the specific heat of the substance? Use q is equal to m cap c sub p triangle cap t
The expression was formed by combining different gas laws. cap v proportional to n cap t over cap p Which law was used to determine the relationship between the volume and the number of moles in this equation?
A beam of light passes though a liquid in a test tube without scattering. Which type of mixture is most likely in the test tube?
The reaction of a Lewis acid with a Lewis base would most likely be accompanied by an increase in which item?
What is a common use of bases?
A 60 point 0 - g sample of fermium- 253 was placed in a sealed vessel 9 point 0 days ago. Only 7 point 5 g of this isotope is now left. What is the half-life of fermium- 253 ?
A supervisor spends a day inspecting a nuclear plant for potential radiation leaks. She has to move throughout the plant inspecting all the equipment and machinery. She needs to take two different radiation detection devices to help ensure her safety and to find radiation leaks. She needs the results immediately. Which two devices would be the best choices for the task?
Pure water at 25 times degree C
The chemical equation shows the burning of magnesium Mg with oxygen open paren cap o sub 2 close paren to form magnesium oxide MgO 2 Mg plus cap o sub 2 rightarrow 2 MgO The molar mass of cap o sub 2 is 32 point 0 g over mol What mass, in grams, of cap o sub 2 is required to react completely with 4 point 0 0 mol of Mg ?
The main component of smog is NO sub 2 times g Smog is a product that is formed through this series of intermediate chemical reactions. N_2(g)+O_2(g)→2NO(g) 2NO(g)+O_2(g)→2NO_2(g) NO_2(g)→light+NO(g)O(g) O_2(g)+O(g)→O_3(g) NO(g)+O_3(g)→NO_2(g)+O_2(g) What is the overall chemical equation for smog after the above intermediate reactions are combined?
A solid is stirred into a liquid and dissolves. Which type of mixture forms?
A sample of propane open paren cap c sub 3 cap h sub 8 close paren has a mass of 0 point 4 7 g The sample is burned in a bomb calorimeter that has a mass of 1 point 3 5 0 kilograms and a specific heat of 5 point 8 2 the fraction with numerator cap j and denominator open paren g times degree cap c close paren How much energy is released by the reaction if the temperature of the calorimeter rises by 2 point 8 7 times degree C ? Use q is equal to m cap c sub p triangle cap t
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