Chemistry

The second ionization energy of a sodium atom isa. About the same as the first ionization energy.b. Much lower than the first ionization energy, because sodium is an alkali metal.c. Much lower than the first ionization energy, because cations are more stable than anions.d. Much greater than the first ionization energy, because second ionization requires removal of a core electron.e. Much greater than the first ionization energy, because second ionization requires creation of a negative ion.
1 Answer
a small steel bead (d = 0.1 mm, rhos = 7900 kg m-3) is released in a large container of fluid. when the gravitational and drag forces on the bead balance, the drag force can be expressed as:
1 Answer
2-methyl-2-butanol reacts rapidly with aqueous hcl to give a(c5h11cl). treatment of a with koh in alcohol gives b(c5h10) as the major product. draw the structure of b.
1 Answer
at what temperature in C does 0.750 mol of an ideal gas occupy a volume of 35.9 L at a pressure of 1.13 atm
1 Answer
For the following, in which case would the buffer capacity not be exhausted either by the addition of 0.5 moles of HCl or by the addition of 0.5 moles of NaOH? a) 0.80 M HF and 0.20 M NaF b) 0.80 M HF and 0.90 M NaF c) 0.10 M HF and 0.20 M NaF d) 0.10 M HF and 0.60 M NaF
1 Answer
What is the percent composition of Oxygen in HSO448.044%57.14%22.145%65.25%
2 Answers
there are about 3.6107 worms in a pond. write the number of worms in standard notation.
1 Answer
which of the following will display optical isomerism? a) square-planar [rh(co)2cl2]- b) square-planar [pt(h2nc2h4nh2)2]2 c) octahedral [co(nh3)6]3 d) octahedral [co(nh3)5cl]2 e) octahedral [co(h2nc2h4nh2)3]3
1 Answer
the blue color in some fireworks occurs when copper(|) chloride is heated to approximately 1500 K and emits blue light of wavelength 4.5010^2 nm. How much energy does one photon of this light carrry ?
1 Answer
Silver nitrate, AgNO3, reacts with iron(III) chloride, FeCl3, to give sliver chloride, AgCl, and iron(III) nitrate, Fe(NO3)3. A solution containing 24.2gof AgNO3was mixed with a solution containing 39.2gof FeCl3. How many excess grams of the excess reactant remain after the reaction is over?
1 Answer
a galvanic cell runs for 1 minute with a current of 0.30 a. how much charge passed through the cell in that time? (f = 96,500 c/mol)
1 Answer
The ages of rocks that contain fossils can be determined using the isotope 87Rb. This isotope of rubidium undergoes beta decay with a halflife of 4.751010y. Ancient samples contain a ratio of 87Sr to Rb87 of 0.0205. Given that 87Sr is a stable product of the beta decay of 87Rb, and assuming there was originally no 87Sr present in the rocks, calculate the age of the rock sample. Assume that the decay rate is constant over the relatively short lifetime of the rock compared to the half-life of 87Rb.
1 Answer
: For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate. Answer the following questions related to H2O Substance AG", at 298 K (kJ/mol)H2O(1) -237.2 H2O(9) -228.4 (a) Using the information in the table above, determine the value of AG represented by the equation H2O(1) H2O(9). at 298 K for the process(b) Considering your answer to part (a), indicate whether the process is thermodynamically favorable at 298 K. Justify your answer. (c) Considering your answer to part (b), explain why H2O(l) has a measurable equilibrium vapor pressure at 298 K
1 Answer
What Is The Predicted PH Of 20 MM HCl Solution? Assume Nothing Other Than HCl And Water Are Present A. 1.0 B. 1.7 c.3.5 D. 11.7
1 Answer
why can two conversion factors be written for an equality like 1 m = 100 cm
1 Answer
What mass (g) of CaCl2 are needed to make 1L of a 3M CaCl2 solution?87.5g100.52g332.94g 9g
1 Answer
Which is the primary energy-carrying molecule in metabolic pathways?A) AMP B) ATP C) NADH D) Acetyl CoA E) FADH2
1 Answer
In which aqueous system is PbI2 least soluble?a. H2Ob. 0. 5MHIc. 0. 2MHId. 1. 0 M HNO3e. 0. 8MKI
1 Answer
which term best describes the pair of compounds shown: enantiomers, diastereomers, or the same compound?
1 Answer
the least polar of the following molecules is ? O ch2cl2 O ccl4 O ch3cl O cocl2 O ncl3
1 Answer
Explain why the spectra belongs with benzaldehyde. Did the spectra you picked match your initial description?
1 Answer
In this experiment, the metal cations in the solutions were initially in the ground state. When placed in the flame, the metals then (absorbed, emitted) energy as (electricity, heat, EM radiation).
1 Answer
.Write a balanced equation, ionic equation, and net ionic equation for:Copper(II) Nitrate + Magnesium.
1 Answer
Water (H20) reacts with hydrazine (N2H4) to produce ammonia (NH3) and hydrogen peroxide (H2O2). The final state of a reaction depicted in the following submicroscopic representation. Which of the following options is the most likely composition of the initial state? Final State :NH3 :H,02 :N HA :H20 p 3 N2H4 molecules, 4 H2O molecules, 1 H202 molecule 2 N2H4 molecules, 4 H2O molecules, 2 NH3 molecules 3 N2H4 molecules, 5 H2O molecules O2 N2H4 molecules, 4 H2O molecules
1 Answer