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What is the ground state electron configuration for Zn ?

3.55 moles #H_2# (g), 1.25 moles #CO# (g), and an unknown number of moles #N_2# (g) were placed into a 5.00 L flask at #25.0^oC#. Given the density of this gas mixture to be 19.92 g/L, how many moles of #N_2# were in the flask?

58.5 is 13% of what number?

How is carbocation formed?

What is the pH of a 0.0453 M #HCl# solution?

How can you identify alkenes?

Question #f83f5

What mass of sodium benzoate should be added to 140.0 mL of a 0.15 M benzoic acid solution to obtain a buffer with a pH of 4.25?

The halflife of bromine74 is 25 min. How much of a 6.0 mg sample is still active after 75 min?

How many moles of ethylene (#C_2H_4#) can react with 12.9 liters of oxygen gas at 1.2 atmospheres and 297 Kelvin?

Why are carbocations unstable?

How do you find a standard form equation for the line (2,1) (0,4)?

How can you test for ketones?

How many millliters of 2.75 M #H_2SO_4(aq)# are needed to react completely with 47.5 g of #BaO_2(s)#?

How can alkenes be used to make ethanol?

How many liters of carbon dioxide can be produced if 37.8 grams of carbon disulfide react with excess oxygen gas at 28.85 degrees Celsius and 1.02 atmospheres?

How many moles of copper are equivalent to #3.44*10^23# atoms of copper?

The halflife of cobalt60 is 5.26 years. If 50 g are left after 15.8 years, how many grams were in the original sample?

How do you convert 225 mmHg into atmospheres?

What are the empirical and molecular formulas of nicotine?

How do you find the vertex of the parabola #y=2x^25#?

What is carbocation intermediate?

The freezing point of an aqueous sodium chloride solution is 0.20°C. What is the molality of the solution?

How many liters are in 16 grams of #H_2# at STP?

The freezing point of an aqueous solution is 2.79°C. What is the boiling point of this solution?

Helium occupies 2.40 L at 123°C. What would the volume of the same sample of gas be at 23°C?

How do you find the vertex and intercepts for #y = (1/8)(x – 5)^2  3#?

What is 306,000,0000 in a scientific notation?

Which Lewis electrondot diagram is correct for a #"S"^(2)# ion?

A solution is prepared to be 0.1475 M in Sr(OH)2. How do you find the [H3O+], [OH‐], pH, and pOH?

The titration of 20.0 mL of an unknown concentration #H_2SO_4# solution requires 83.6 mL of 0.12 M #LiOH# solution. What is the concentration of the #H_2SO_4# solution (in M)?

What mass of #SbCl_3# can be produced from the reaction of 3.570 L of chlorine at STP reacting with an excess of antimony in the reaction #Sb+Cl_2 > SbCl_3#?

What is the point of intersection of the lines #y = 2x + 4# and #x + y = 11#?

An ideal gas sample is confined to 3.0 L and kept at 27°C. If the temperature is raised to 77°C and the initial pressure was 1500 mmHg, what is the final pressure?

What is the weight in grams of #3.36 * 10^23# molecules of copper sulfate #CuSO_4#?

If you had a 100gram sample of plutonium, how much would still remain in 43 years?

How do you solve #2(6  x) = x(x + 5) # using the quadratic formula?

A 12.0 L sample of argon gas has a pressure of 28.0 atm. What volume would this gas occupy at 9.70 atm?

What does the number prefix tell you in the name of a branched alkane?

Polonium214 has a relatively short half life of 164 s. How many seconds would it take for 8.0 g of this isotope to decay to 0.25 g?

How do you prove #cos(x+y)cos(xy)= cos^2x  sin^2y#?

At approximately what pressure will water be a vapor a 0°C?

How many grams of #Cl# are in 515 g of #CaCl_2#?

One of the lines in the emission spectrum of the hydrogen atom has a wavelength of 656.7 nm, how would you Identify the value of n initial for the transition giving rise to this emission?

What is the vertex form of #y=4x^2x+4#?

What is the pH of a 0.0067 M KOH solution?

What is the equation to find pH and pOH?

What is the lewis structure of #NO^+#?

The mass defect for a Li6 nucleus is 0.03434 g/mol. How do you calculate the atomic mass of Li6?

What is the standard cell notation of a galvanic cell made with silver and nickel?

What is a property of all alkanes?

How many grams of #K_2CO_3# are needed in order to produce 2.0 mol #K_2O#?

What is half chair conformation?

What is the #"pH"# for #2.5 xx 10^(6) "M"# #"HCl"#?

How do London dispersion forces increase?

How do you find vapor pressure?

What is the halflife of 20 g of a radioactive sample if 5 g remain after 8 minutes?

A 100.0 mL sample of .10 M #NH_# is titrated with .10 M #HNO_3#. What is the pH of the solution after the addition of 150.0 mL of #HNO_3#?

How do you write #f(x)=x^2+4x+6# in vertes form?

What kind of reaction is #2Fe(s) + O_2(g) > 2FeO(s)#?

What is the vertex of the parabola #y=(x8)^2#?

Question #e901d

What is the Lewis structure of #BF_4^#?

How do you rationalize the denominator and simplify #(1+sqrt2)/(35sqrt2)#?

How do alkoxide ions form?

How do you solve #x + 3y = 6# and #2 x + y = 4# using substitution?

How do you write the pointslope form of the equation below that represents the line that passes through the points (−3, 2) and (2, 1)?

How do you find the midpoint of the line segment joining (2, 3) and (5, 4)?

What is the the vertex of #y =x^2  4x  10#?

How do you graph #y = x + 2# by plotting points?

What is a secondary alcohol?

How do you write an equation of a line going through (1,2) (1,2)?

What is the pH of a 0.85 M #NH_4Cl# solution?

Question #9abd1

How do you write a quadratic equation with Vertex: (1,3) xintercept: 2?

If the mole fraction of #NaCl# in an aqueous solution is 0.0927, what is the percent by mass of #NaCl#?

Sodium24 has a halflife of 15.0 hours. Suppose you had a sample containing 0.010 moles of Na24. How many hours would be required to reduce your sample to 6.25 x 10^4 moles?

What frequency does a photon of wavelength #4.5 * 10^4# #m# have?

What is the standard form of the equation of the parabola with a directrix at x=5 and a focus at (11,7)?

In 5.49 seconds, 1.20 g of argon35 decays to leave only .15 g. What is the half life of argon35?

How do you graph #Y=(x4)^2#?

The product of two consecutive even integers is 168. How do you find the integers?

How do you name meso compounds?

Question #269de

How do you do addition reactions of alkenes?

How do you name cycloalkanes with halogens?

What is the number of moles in 9.63 L of #H_2S# gas at STP?

How are aldehydes different from ketones?

Question #7ee1d

If the density of an unknown gas #Z# 4.50 g/L at STP, what is the molar mass of gas #Z#?

Question #3f2c0

What is the molecular shape of acetylene?

What is the pH and pOH of a #1.5 * 10^3# M solution of sulfuric acid (#H_2SO_4#)?

What is the effect of changing #y = 3x2# to the equation #y = 3x+ 2#?

How many valence electrons does #NO_3^# have?

How do you rationalize the denominator and simplify #sqrt18/sqrt3#?

You have a compound that is composed of 62.0 grams #C#, 12.15 grams #H#, 13.771 grams #O# and 12.059 grams #N#. What is its empirical formula?

What is the HendersonHasselbalch equation? How is it used in chemistry?

The pH of a solution is 5.6. What are the hydrogen and hydroxide concentrations?

What is the value of #cos (pi/3)  sin((3pi)/2)#?

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