Chem flashcards for UNM 121 Final Exam
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| The statement, "In a chemical reaction, matter is neither created nor destroyed" is called? | show 🗑
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| show | sugar
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| show | Both A and B are examples of chemical change.
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| True/False: Potential energy is the energy associated with its movement. | show 🗑
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| All of the following are SI base units of measurement, EXCEPT: second, mole, kelvin, gram, meter | show 🗑
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| show | 82 degrees celsius
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| Determine the mass of an object that has a volume of 88.6 mL and a density of 9.77 g/mL. | show 🗑
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| show | Her results are both precise and accurate.
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| show | 13189
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the sum of the number of protons and neutrons.
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p+ = 29 n° = 36 e- = 29
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| Predict the charge that an ion formed from sulfur would have. | show 🗑
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| show | Mg
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| Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is 48.16%. What is the amu of the other isotope? | show 🗑
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| show | 6.5 × 102 grams
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| show | CaSO4
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| What is the empirical formula for C4H10O2? | show 🗑
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| Give the structure for sodium chlorate. | show 🗑
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| Write the name for Ca3(PO4)2. | show 🗑
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| show | H2SO3
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| What is the mass of 9.44 × 1024 molecules of NO2? The molar mass of NO2 is 46.01 g/mol. | show 🗑
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| show | Al(C2H3O2)3 (aq) + (NH4)3PO4 (aq) → AlPO4 (s) + 3 NH4C2H3O2 (aq)
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| show | CH3CH2NH2
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| How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol. 4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g) | show 🗑
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| How many moles of LiI are contained in 258.6 mL of 0.0296 M LiI solution? | show 🗑
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| Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Ca(NO3)2 solution to 150.0 mL. | show 🗑
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| show | strong electrolyte, strong acid
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2 H+(aq) + CO32-(aq) → H2O(l) + CO2(g)
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| A gas occupies 3.33 L at 2.23 atm. What is the volume at 2.50 atm? | show 🗑
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| A syringe contains 0.65 moles of He gas that occupy 750.0 mL. What volume (in L) of gas will the syringe hold if 0.35 moles of Ne is added? | show 🗑
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| A gas is at 35.0°C and 4.50 L. What is the temperature at 9.00 L? | show 🗑
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| A sample of gas initially has a volume of 859 mL at 565 K and 2.20 atm. What pressure will the sample have if the volume changes to 268 mL while the temperature is increased to 815 K? | show 🗑
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| Calculate the temperature, in K, of 2.20 moles of gas occupying 3.50 L at 3.30 atm. | show 🗑
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| Place the following gases in order of increasing density at STP. N2, NH3, N2O4, Ar | show 🗑
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| A mixture of N2, O2 and Ar have mole fractions of 0.25, 0.65, and 0.10, respectively. What is the pressure of N2 if the total pressure of the mixture is 3.9 atm? | show 🗑
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| Rank the following in order of decreasing rate of effusion. F2, SF6, CO, Kr | show 🗑
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| Calculate the change internal energy (ΔE) for a system that is giving off 45.0 kJ of heat and is performing 855 J of work on the surroundings. | show 🗑
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3.95 J/g°C
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| Identify what a bomb calorimeter measures. | show 🗑
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| Calculate the change in internal energy (ΔE) for a system that is absorbing 35.8 kJ of heat and is expanding from 8.00 to 24.0 L in volume at 1.00 atm. (Remember that 101.3 J = 1 L∙atm) | show 🗑
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| A 4.98 g sample of aniline (C6H5NH2, molar mass = 93.13 g/mol) was combusted in a bomb calorimeter with a heat capacity of 4.25 kJ/°C. If the temperature rose from 29.5°C to 69.8°C, determine the value of ΔH°comb for aniline. | show 🗑
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| Which of the following processes is endothermic? | show 🗑
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| show | 2.66 × 105 kJ
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| Use the standard reaction enthalpies given below to determine ΔH°rxn for the following reaction: 2 S(s) + 3 O2(g) → 2 SO3(g) ΔH°rxn = ? Given: SO2(g) → S(s) + O2(g) ΔH°rxn = +296.8 kJ 2 SO2(g) + O2(g) → 2 SO3(g) ΔH°rxn = -197.8 kJ | show 🗑
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| Choose the thermochemical equation that illustrates ΔH°f for Li2SO4. | show 🗑
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| show | ultraviolet light > microwaves > radio waves
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the frequency decreases
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| show | 22.1 m/s
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| show | n = 1 to n = 2
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| What value of l is represented by a d orbital? | show 🗑
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| show | C
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| show | angular momentum quantum number
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| show | n = 3, l = 1, ml = 0
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