How much of a 5 M stock solution of HCl is needed to make 250 mL of a 0.1 M solution of HCl?
I need help in solving this word problem: A corrupt barman attempts to prepare 100ml of some drink by mixing 30ml of ethanol with 70 ml of water. Does he succeed? If not, what volumes should have been mixed in order to arrive at a mixture of the same strength but of the required volume?
Precipitation Calculations. Will a precipitate of calcium sulfate (Ksp = 2.4 x 10-5) form when 50.0 mL of 0.00150 M calcium chloride and 25.0 mL of 0.0100 M sodium sulfate are mixed? Why or why not?
What color has the smallest band in the spectrum of a tungsten light bulb? I have guessed yellow because the waves are shortest but don't know if I am right.
Characteristic chemical differences between metals and non-metals, corresponding phosphorus and arsenic compounds
What are the characteristic chemical differences between metals and non-metals? Explain why corresponding phosphorus and arsenic compounds resemble each other more closely than they do nitrogen compounds. Name each of the following ions or compounds. (see the attachment for the compounds)
"What would the world be like where water is as dense as a solid rather than a liquid?" Ideas occur.
A closed flask contains a .25 moles of O2 which exerts a pressure of .50 atm. If .75 moles of CO2 is added to the container what is the total pressure in the flask? Please provide step by step instructions with explanation.
Which one of the following configurations depicts an excited oxygen atom? a. 1s22s22p2 b. 1s22s22p23s2 c. 1s22s22p4 d. [He]2s22p4 e. 1s22s22p1 In a ground-state manganese atoms, the _____ subshell is partially filled. a. 4s b
Please explain steps taken to establish the center of mass with polar covalent bonds and dipole moments - why is this important?
What got oxidized, what got reduced, the oxidizing agent, the reducing agent, spectator ions? Please help me identify 5 things
Your patient needs to receive 7.2mCi of a radioactive isotope intravenously. the isotope is supplied in vials containing 7.00cc of liquid and each vial has an activity of 80mCi. How many mL of the liquid should your patient receive? How to set up this problem?Step by step instructions please.
Suppose a bottle is labeled 3.50 x 10-7 M M(OH)3, where M = an unknown metal. What are the values of [H3O+] and [OH-]?
Which of the following is true of Cu-36? It has ________. a. 29 electrons b. 63 protons c. 63 neutrons d. 29 neutrons.
Balance the equation with the SMALLEST WHOLE NUMBER COEFFIECIENTS possible. Choose the number that is the sum of the coefficients in the balanced equation. As2S3 + O2 -> As4O6 + SO2 a. 17 b. 16 c. 21 d. 20 e. 18.
Which pair consist of equalities? a. 3 x 10^-3 mL and 3 L b. 7 x 10^2 g/mL and 7 x 10^-9 kg/L c. 6 x 10^2 mm and 6 x 10^-5 m d. none of these pairs are equalities Explain how you derived at the answer.
What is the concentration of g salt per 100 g water of a saturated solution in which 3.82 g of salt are dissolved in 9.54 g of water?
In the equation CaO+3C > CaC2+CO, where 75.5 kg of CaO produces 85.9 kg of Calcium carbide, how much calcium carbide will be produced if the percentage yield is 92.4%?
Photosynthesizing autrotrophs use water to change carbon dioxide into glucose. Oxygen is a waste product. If the Beast's rose produces 0.500 mol of glucose, what is the pressure of (O2) that forms in the 5.0 L jar covering the flower in the cold castle (11 degrees celsius)? Do not worry about how the reactants got in.
Using the Boltzmann distribution given below, determine Jmax (quantum number of the most intensely populated rotational state) as a function of temperature. Then find Jmax for CN+ at 298 K and 1100 K. and CN+ bond length is 0.129 nm the Boltzman distribution: (Ni/N)= (exp(-ei/KT))/(sigma j exp(-Ej/KT)).
A radio station announcer reports the atmospheric pressure to be 99.6 kPa. What is the pressure in atmospheres? In millimeters of mercury?
The element boron consists of two isotopes, 10(superscript), 5(subscript)B and 11(superscript), 5(subscript)B. Their masses, based on the carbon scale, are 10.01 and 11.01, respectively. The abundance of 10(superscript), 5(subscript)B is 20.0%. What is the abundance of 11(superscript), 5(subscript)B?
1. Ethylene glycol is used as automobile antifreeze. 6.38g og this compound contains 2.47g of carbon and 0.620g of hydrogen. The rest is oxygen. The molar mass is 62.0g/mole. What are the empirical and molecular formulas of ethylene glycol? (observe significant digits)
I have proposed to show the relationship between chemistry and a basketball. My intent is to show the composition of basketballs from different time periods. My answer must be presented as a 10 minute class presentation. Help!!!
The solubility product of Mg(OH)2 is 1.2E-11. What minimum OH- concentration must be attained (for example, by adding NaOH) to decrease the Mg2+ concentration in a solution of Mg(NO3)2 to less than 1.9E-10 M?
When do you use 0.08206 l atm versus 8.345 l atm? Can you tell me how you decipher when to use one or the other generally? Thank you.
The solubility product of PbBr2 is 8.9E-6. Determine the molar solubility in the following. pure water 0.12 M KBr solution 0.12 M Pb(NO3)2.
Calculate the concentration of ions in the following solutions (a) [I] in AgI in AgI solution with [Ag+] = 9.6E-9 M Ksp=8.3E-17 (b) [Al3+] in Al(OH)3 solution with [OH-] = 3.8E-9 M Ksp=1.8E-25 I got the first one and it is correct: AgI-------------->Ag + I I
How can i find the pressure of oxygen if it's in a mixture of .40 moles of oxygen and .20 moles of nitrogen at 1.2 atm pressure
Please discuss how to find the partial pressure of o2 when the container has .76 mol of N2, .18 mol of O2, .031 MOl of He, and .026 mol of H2 at 744mmHg.
I cant remember how to find the volume of the gas produced when 1kg of nitroglycerine explodes at a temp of 1985*C at 1 atm.