Can someone help me with chemistry... PLEASE?
An equilibrium constant is referred to as a solubility product if one side of the reaction is just a solid, meaning its level does not factor into the equation. 1, 3 and 4 seem to fit this billing, as they are all the dissociation of a solid into cations and anions. For example, in 1, lead iodide dissolves into lead ions and iodide ions, but the equilibrium equation is just: K_sp = [Pb2+] [I-]^2. Which is just a product, not a fraction. Hence, K_sp, solubility product.
Can someone help me with chemistry?
The number of atoms in a mole of any pure substance is called (26.66 point) its atomic number Avogadro's number its mass number its gram-atomic number What can be said about 1 mol Ag and 1 mol Au? (26.66 point) They are equal in mass They contain the same number of atoms Their molar masses are equal They have the same atomic mass An Avogadro’s number of any element is equivalent to (26.66 point) the atomic number of that element the mass number of that element 6.022 x 1023 particles 12 g of that element The atomic mass of hydrogen is 1.008 amu. The reason that this value is not a whole number is that (26.66 point) hydrogen only exists as a diatomic molecule the mass of hydrogen is the sum of the masses of the protons and electrons in the atom the mass of a proton is not exactly equal to 1 amu hydrogen has more than one isotop
Can someone help me with chemistry please??
1) the cation is named first, followed by the anion. When naming ionic compounds, change the ending of the anions to -ide instead of -ine. 2) Roman numerals are appropriate when naming compounds that contain transition metals to indicate their charge. 3)The numerical subscript refers to the number of atoms in that compound. 4)the subscript following parentheses refers to the number of polyatomic ions the compound contains. 5) when writing the formula for an ionic compound, multiply each charge by the number of atoms that will balance the charge of both ions. Normally just reversing them and using them as subscripts work fine. chemical formulas: Pb(No3) NaCH3COO NH4Cl Na3PO4 Ca(OH)2 SnCl4 KBr Calcium chloride Iron (II) chloride Sodium hydrogen phosphate Sodium dihydrogen phosphate
Can someone help me with chemistry?
1.A sealed balloon is filled with 0.800 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 210. torr and the temperature is -26°C. What is the change in volume of the balloon as it ascends from 1.00 atm to a pressure of 210. torr? L 2A 4.4 L flask contains 0.43 g O2 at a temperature of 28°C. What is the pressure (in atm) inside the flask? atm 3.At 0°C a 1.00 L flask contains 1.80 10-2 mol N2, 7.70 102 mg O2, and NO at a concentration of 9.00 1018 molecules/cm3. What is the partial pressure of each gas, and what is the total pressure in the flask? PN2 = atm PO2 = atm PNO = atm Ptotal = atm 4. A sample of nitrogen gas was collected over water at 20.°C and a total pressure of 1.50 atm. A total volume of 2.75 102 mL was collected. What mass of nitrogen was collected? (At 20.°C the vapor pressure of water is 17.5 torr.) g
Could someone into chemistry/physics help?
First of all, we need to know what causes steam visible?The layer of air right above the hot liquid (making steam) may be as much as 20% water! But this layer is lifted by natural convection into the cooler air above it. Now the air cannot hold as much water, and so some returns to the liquid form. Tiny drops condense out, making the visible steam.The plume of steam above the hot liquid is actually a cloud of tiny drops of water. The evaporation of water is an important mechanism for cooling the liquid; the re-condensation of the water delivers the energy to the surrounding air.Apparently the air in the room is not as humid as it could be, and so as the steam cloud mixes into the air, the little drops evaporate again. The steam disappears.Reference - Physics Tutor / Chemistry Tutor
Can someone help with chemistry homework?
Okay, you use the fact that STP one mole of any gas occupies the same volume, the molar volume constant is 24dm3/mol. Mr(c2h2)=2*12+2=26 g/mol so 9.45g is 9.45 /26 mol or 0.363 mol ( 3sf) and so 24 * 0.363 dm3 or 8.71dm3. So 8.71 dm3.
I need some with this chemistry problem can someone help me. SHow details on how you got your answer please?
Eq. S8+o2=so2 Balanced eq. s8 + 8o2 = 8 so2 G=given UK=unknown (g)= grams (mols)= moles G(g) X 1 mol X UK(mol) X UK(g)= UK(g) ...........Over.....Over.........over ...........G(g)......G(mol).......1 mol from: (periodic table) (equation) (periodic table) 31.5g S8 X (1mol)/(32.06X8)= 31.5g s8 x 256.48= 8079.12 mol S8 8079.12 mol S8 X 8 mol so2(Bal. Eq) over 1 mol s8 (Bal eq) 8079.12x8= 64632.96 mol s8 64632.96mol so2x.... 63.86g so2 over 1 mol s= 1 x 32.06 o= 2 x 15.99 ==63.86 Answer:64632.96 X 63.86 = 4127460.826 g so2 GOOD LUCK! Its a lot harder to type then I thought!
I need help on chemistry homework! can someone help me?
1. What is the percent composition of each of the following? a. HgS b. Mn2P2O7 2. How many kilograms of iron can be recovered from 639 kilograms of the ore Fe2O3? 3. Write a empirical formula for I2O5. 4. Vitamin C has a gram formula mass (molar mass) of 176g. What is the molecular formula for ascorbic acid? 5. MnO2+4HCI --> MnCl2+Cl2+2H2O Given 130.5g of MnO2, how many moles of HCI may react? whichever can be answered would be great! thank you.
Where can I get help with my chemistry homework?
You can come to Quora to ask questions, but be aware that not all responders are equally qualified. Also, beware of responses that merely answer the question without helping you with the concepts—you may get the right answer, but you could be unable to extend your ability to related questions. As a high school chemistry teacher, I tend to avoid questions that seem to me to be merely asking for an answer, and I will answer questions looking for deeper understanding with a more thorough explanation that may end up guiding you to, rather than merely revealing, the correct answer. This is the approach that I take when providing “extra help” to my own students, even when they seem merely to be fishing for the correct answer.Your best source is generally your teacher (or if you’re in college, your discussion group leader), since they can help guide you to the correct answer by understanding what the question is asking and asking probing questions to bring you to understanding the question rather than merely getting the “right answer.”For help with understanding concepts, there are a number of YouTube channels available—you can search on the topic you’re interested in to find explanatory videos.
Can anyone help me with the ICSE chemistry?
Hi there…I had written a similar answer..I am sharing the link~Atmaja Bandyopadhyay's answer to How do I score 95 above in ICSE chemistry?Hope it helps..Good luck:-)