lavonne

This page lists questions and answers that were posted by visitors named lavonne.

Questions

The following questions were asked by visitors named lavonne.

If 20.0mL of an unknown acid was titrated with 2.0 M KOH and 60.0 mL KOH was used what is the molarity of the unknown acid?

15 years ago

if 22.5 mL of 0.383 M HCl are required to completely neutralize 20.0 mL of KOH, what is the molarity of the KOH solution?

15 years ago

if a certain pressure supports a 256 column of mecury, how high a column of water would it support?

15 years ago

A steel tank contains carbon dioxide at 34 celsius and is at a pressure of 13.0 atm. Determine the internal gas pressure when the tank and its contents are heated to 100 celsius

15 years ago

A steel tank contains carbon dioxide at 34 celsius and is at 13.0 atm. Determine the internal gas pressure when the tank and its contents are heated to 100 clesius. Do i need to convert to kevins here. There are answers using both, so which is correct.

15 years ago

The first step in the Ostwald process for making nitric acid is the formation of NO as follows; 4HN3 + 5O2 makes 4NO + 6 H2O. According to the equation, 5 moles of NH3 will react stoichiometrically with blank moles of O2 to form blank moles of NO. I can't...

15 years ago

Calculate the density of chlorine gas in g/L, at STP I'm coming up with 3.2g/L (by using 70.9 g Cl2) Cl gas is diatomic, correct? Is this correct?

15 years ago

Calculate the pressure of 0.55 mol NH3 gas in a 2.00 L vessel at 25 celsius, using ideal gas law.

15 years ago

How many grams of CO2 are contained in 550 mL of the gas at STP I've worked all of these questions and I'm trying to see if I'm right, and if not, where I went wrong.

15 years ago

A 1.325 g sample of an unknown vapor occupies 386 mL at 114 celsius and 946 mmHg. The simplest formula of the compound is NO2. What is the molecular formula of the compound? (I have N2O4, is this correct and if not, why not? We never went over this type o...

15 years ago

A sample of hydrogen gas was collected over water at 36 degrees celsius and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (vapor pressure of water is 44.6 torr at 36 degrees Celsius)

15 years ago

A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.45 celsius to 23.65 celsius.The heat capacity of the caloimeter, excluding the water, is 2.21 kJ/degree celsius. using this inf...

15 years ago

Data: 2Ba(s) + O2(g) ¡æ 2BaO(s) ∆H¡Æ = -1107.0 KJ Ba(s) + CO2(g) + ¨ö O2(g) ¡æ BaCO3(s) ∆H¡Æ = -822.5 KJ Given the data above, calculate the ∆H¡Æ for the reaction below. BaCO3(s) ¡æ BaO(s) + CO2(g)

15 years ago

Data: SO2(g)+ 1/2O2(gas)forms SO3(g)Delta H = -99.1 kJ. Given the above data, calculate the enthalpy change when 89.6 g of SO2 is converted to SO3. Is this a grams to moles conversion or what? I can't find any examples of this type of calculation.

14 years ago

Data: C(graphite) + O2(g) forms CO2 (ga) Delta H = -393.5kJ H2(g) + 1/2O2(g) forms H2O(l)Delta H = 285.8kJ. CH3OH(l) + 3/2O2(g)forms CO2(g) + 2H2O(l)Delta H = -726.4 Using data above, calculate the enthalpy change for the raction below C(graphite) + 2H2 +...

14 years ago

What is the bond angle for H2O2 abd what is the bond angle and how would you draw ClO3-

14 years ago

The Rydberg equation, with n1=1, predicts an ultraviolet series of spectral lines of atomic hydrogen. Which of the following wavelengths is not predicted by the equation: 1/ = (1.097 x 10(7) m - 1) x (1/n1(2)-1/n2(2)

14 years ago

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 x 10(3) m/s, the uncertainty in its position is at least a)66 m b)17 m c)6.6 x 10-8 m d)1.7 x 10-8 m e)None of the above

14 years ago

Which of the following is not a one-electron atom A) H B) He+ C) Li2+ D) Be2+ E) O7+ I know that H, He+, Li2+ and Be3+ are. i can't seem to find out about Be2+ and O7+. How do I calculate it?

14 years ago

which of the following sets of quantum numbers (n,l,ml,ms) describes the electron which is most easily removed when a sodium aton is converted to a sodium ion? a)2,1,0,-1/2 b)2,0,0,-1/2 c)3,1,1,+1/2 d)3,2,1,-1/2 e)3,0,0,+1/2 can anyone explain this so I u...

14 years ago

The electron configuration of the outermost electrons of the halogen group is: a)ns2np7 b)ns1 c)ns2np5 d)ns2np6(n-1)d7 e)ns2np6

14 years ago

which of the following is not paramagnetic? a)Co3+ b)Se2- c)Gd (element 64) d)Ni e)Gd3+

14 years ago

I have a big exam tomorrow. Can anyone tell me any easy way to figure out the 4 quantum numbers, n, l, ml, and ms. i still get confused especially with the n and ml!

14 years ago

Ok, I really need to know how to work problems like these so could someone please show me how to set it up?! Given this data: 1. C(graphite) + O2(g) produces CO2(g), delta H = -393.5 kJ 2. H2(g) + 1/2 O2(g) produces H2O(l), delta H = -285.8 kJ 3. Ch3OH(l)...

14 years ago

How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!

14 years ago

What is the density of CO2 gas at -25.2 degrees celsius and 98.0kPa?

14 years ago

A sample of ammonina gas at 65.5 degrees celsius and 524 torr has avolume of 15.31 L. What is it's volume at -15.8 degrees celsius and its pressure is 524 torr?

14 years ago

Answers

The following answers were posted by visitors named lavonne.

Sorry, its mm of mecury.

15 years ago

Do I need to convert the temperature from Celsius to Kelvin for this equation. The answers are multiple choice and there is one for it using both. Isn't kelvin always used for these type of calculations?

15 years ago

Sorry forgot to post the wavelengths. A) 182nm B) 103nm C) 97nm D) 95nm E) 91nm

14 years ago

Thanks! That was what I thought.

14 years ago

So adding of removing the electrons gives all of them 18 elctrons like Argon except for V3+, correct? Thsi makes it the non-isoelctric species? It wasn't explained to me this way and this makes it much easier to see. Thanks!

14 years ago