Chemistry

CHEMISTRY
THE DIFFERENT TYPES OF THE FUNCTIONAL GROUP IN ORGANIC CHEMISTRY

Chemistry (stuckkk) (PLZ HELP)
24. Identify a source of error for the experimental design of the cobalt(II)chloride system In the experiment, there were three test tubes. All of them contained cobalt(II)chloride. Test tube 1 was the constant, therefore, did not change throughout the experiment. Test tube 2...

Chemistry (stuckkk)
24. Identify a source of error for the experimental design of the cobalt(II)chloride system

chemistry
What would the concentration be of 2ml of feed into 750ml instead of 1000ml

Chemistry (PLZ HELP)
1. Outline a procedure to prepare an ammonia/ammonium buffer solution. I'm confused how to start it off.

chemistry
a rigid container of O2 has a pressure of 340 kPa at a temperature of 713 k what is the pressure at 273 k? show work i dont know but i think formula for it is T1/P1=T2/P2 and that's all I know

chemistry
What is the percentage of water in the hydrate CoCl2 • 6H2O? Show work I'm confused whether it's 52.17% or 45%

chemistry
describe two reasons why an alpha particle is less penetrating than a beta or gamma particle

Chintles school chemistry
What will be mass of ferrous sulphide formed when 20 gram of cloth sulphur reacts iron please tell only mass

chemistry
what happens in the artificial transmutation of an element?. Give an example. Please help asap and thanks!

Chemistry
HCHO2 = 1.77 * 10^-4 If the concentration of formic acid (HCHO2) is 1.24 M, what is the concentration of H30+ in the solution?

Chemistry
28. Explain, in terms of equilibrium shifts, how this buffer mixture resists changes in pH when small quantities of both a strong acid and a strong base are added. The buffer mixture was made up of: monosodium phosphate(NaH2PO4) and disodium phosphate (Na2HPO4)

Chemistry (PLZ HELP)
1. Outline a procedure to prepare an ammonia/ammonium buffer solution. I'm confused how to start it off. This is an outline of how the steps should be: Step One - Calculate the concentration of hydronium ions in the solution that requires buffering. You can determine this ...

Chemistry
What is the electron configuration of the element with 27 protons? Is it 1s2 2s2 2p6 3s2 3p6 3d7 4s2 or is that wrong?

Chemistry
What is the electron configuration of the element with 27 protons?

Chemistry
Why are the atomic masses of elements usually decimal numbers?

Chemistry
If an element has 12 protons and 17 neutrons, how many electrons does it have? I think the answers twelve but I'm not sure?

Chemistry
Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer.

Chemistry
Explain why a model of the atom is crucial to understanding chemistry and in explaining the behavior of matter.

Chemistry
What parts of Dalton’s atomic theory no longer agree with the current picture of the current picture of the atom? Provide an answer using at least 3 to 4 complete content related sentences in your own words.

Chemistry
I am given the following information: Lactic acid................0.025M..............​.....pH 2.74 How do I calculate the pKa? I don't know how to do it without the concentration. Help please!

chemistry--please help!
How many minutes does it take to produce 10.0L of oxygen gas (at standard conditions) by electrolyzing neutral water with a current of 1.3 A? What is the corresponding volume of hydrogen gas produced? thanks so much

Chemistry
An aqueous sodium salt (NaCnH2n+1O3) solution has an osmotic pressure of 2.041 atm when 1.068 g of the salt are dissolved in 200. g of water at 25 degrees C. Assuming molality and molarity in such a dilute solution are the same and that the sodium salt is completely ...

Chemistry (PLZ HELP)
Hydrazine, N2H4(aq), is used in the preparation of polymers, pharmaceuticals and rocket fuel. Hydrazine has alkaline properties similar to ammonia and will act as a weak base. Given that a 100 mL sample of 0.10 mol/L hydrazine solution has a pH of 10.55 at 25.0 oC, write the ...

Chemistry
If a solution has a pH of 8.14, calculate [H3O+]?

Chemistry
Hydrazine, N2H4(aq), is used in the preparation of polymers, pharmaceuticals and rocket fuel. Hydrazine has alkaline properties similar to ammonia and will act as a weak base. Given that a 100 mL sample of 0.10 mol/L hydrazine solution has a pH of 10.55 at 25.0 oC, write the ...

Chemistry
The radioisotope radon-222 has a half-life of 3.8 days. How much of a 65-g sample of radon-222 would be left after approximately 15 days?

chemistry--please help! :)
A galvanic cell is connected to a small light bulb for 40.0 minutes. The electrodes are copper and silver and the copper electrode is immersed in a solution of copper sulfate. During that time, the average current drawn by the bulb is 0.12 A. a. What is more reactive, copper ...

Chemistry
Cu(s) | Cu2+(0.10M) || H+ (0.20M), MnO4-(0.35M), Mn2+(0.15M) | C(s) Determine the cell potential. ii. Is this reaction spontaneous? Prove using ∆G. iii. The equilibrium constant can also be found from Standard Cell Potentials. Eventually the cell will reach equilibrium. In ...

Chemistry
What are some uses for radioisotopes?

Chemistry
If you had an acetic acid solution that was 0.10 M, what would the acetate concentration have to be in order to get a pH of 5.35? I tried doing [H+] = 10^(-pH), but I don't think that's right. Please help, I'm stuck.

Chemistry
How much energy is given off if 1 mol of CH4 is burned?

Chemistry
At room temperature, which has a greater average velocity, neon or helium? An explanation would be nice as well!!

Chemistry
What is the concentration of an unknown potassium dichromate solution with an absorbance of 1.603 at 345nm? (The path length is 1 cm, molar absorptivity constant = 0.412 A.mol-1.cm-1 )

Chemistry
How many mL of water would you add to 32 mL of 0.62 M ammonium chloride stock solution to make a 0.3 M solution?

Chemistry
What is the Molarity of sodium ions in a 3.3 M solution of sodium phosphate?

Chemistry
What is the Molarity of sodium ions in a 3.3 M solution of sodium phosphate?

chemistry
Calculate the mass of zinc oxide when 0.1mole of zinc trioxocarbonate (iv)is heated strongly.

Chemistry
How to distinguish between 3 alcohol types explain please

Chemistry plz helppp!!!
Why for the ionization of gas,lower pressure is more favoured than high as in the discharge tube? High pressure means more particles to be ionized then what is the reason behind this?

Chemistry
Which of the following is a correct statement about collision theory? A. All collisions lead to chemical reactions. B. Most collisions lead to chemical reactions. C. Very few reactions involve particle collisions. D. Effective collisions lead to chemical reactions. E. ...

Chemistry
The question is asking the molarity of vinegar, and I am not sure if i did it right. NaOH + HCH3COO = CH3COONa + H2O NaOH C= 0.70mol/L V= 14.6mL --> 0.0146L n, NaOH = CxV = 0.70 (0.0146) = 0.01022mol 1 mol NaOH = 0.01022mol NaOH ----------------- ------------------------- 1...

Chemistry
Steel plate is in contact with copper. Give the scheme of electrochemical corrosion in natural and acidic medium and write the equations for the reactions that occur.

Chemistry
H2(g) + I2(g) 2 HI(g) The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? select all that apply 1.) Energy is absorbed 2.) Energy is released 3.) [H2] increases 4.) [H2] decreases...

Chemistry
At what temperature would 41.9 g of oxygen in a 40.0-liter tank produce a pressure of 15.2 psi?

Chemistry
What are radioisotopes? and Are they harmful to humans?

Chemistry
How much faster does nitrogen monoxide (NO) effuse in comparison to dinitrogen tetraoxide (N2O4)

Chemistry
How much heat is required to warm 122g of water by 23.0°C? Specific heat is 4.184 J/g° C. Please show work:(((

Chemistry
3.A sealed balloon contains 62mL of carbon dioxide is in a freezer at -15degrees celsius. The balloon is then removed to the interior of a car that has been sitting there this summer sun and is at 72degrees celsius. Assuming the balloon remains sealed and the pressure is ...

Chemistry
2.Which gas law would you use to calculate the new pressure for a gas when the volume of the trapped gas changes well temperature remains constant?

Chemistry
1.What is important to remember about the temperature unit for any gas law calculation?

Chemistry
What happens to the particles of the liquid in liquid-in-glass thermometers? and is this an example of thermal expansion?

Chemistry
If you have 10.00 mL of 0.5875 M H3PO4, how many mL of 0.2625 M NaOH are needed to reach the point of complete neutralization?

Chemistry
Calculate the number of moles of cacl2 that can be obtained from 25g of lime stone(caco3) in the presence of excess hydrogen chlorine

Chemistry
49.0 mL of HClO3 is completely titrated by 68.4 mL of a Sr(OH)2 solution whose concentration is 0.3893 M. What is the molarity of the HClO3 solution? Sr(OH)2 + 2HClO3 = 2H2O + Sr(ClO3)2

Chemistry
Do gases follow any of these principles all the time? 1. The space between gas molecules is much larger than the molecules themselves. 2. Gas molecules are in constant random motion. 3. The average kinetic energy is determined solely by the temperature. 4. All collisions ...

Chemistry
Can someone link me videos and sites that can teach me the formula to solve these? Or try to help me understand how to solve these? 1.You have 200g of a radioisotope . If the half-life of this radioisotope is 20 days, how many grams will remain after 40 days? 2.Calculate the ...

Chemistry
What happens to particles in thermal expansion?

Chemistry
what happens to the molecules of propane as they are pressurized in a propane tank?

CHEMISTRY
What volume of 2.5*10^-2 M H2SO4 is required to neutralize 125mL if 0.03 M KOH

calclus
Chemistry teachers love to have different shaped beakers in their classroom (I guess it makes the classroom look for impressive). Different shaped beakers result in different rates the water level rises. Task: Determine the rate in which the water level rises in a non-...

Chemistry
A solid nonelectrolyte with a mass of 11.32g is dissolved in 115.00g of water. The observed freezing point of the solution is-3.44 degrees C. Given Kf of water=1.86 degrees C/m, what is the molar mass of the unknown solid?

Chemistry
what are two examples of thermal expansion? What is happening to the particles in each case?

Chemistry
what happens to the molecules of propane as they are pressurized in a propane tank?

Chemistry
For each Kinetic Molecular Theory principle, do all gases follow this principle all of the time? why or why not? 1. The space between gas molecules is much larger than the molecules themselves. 2. Gas molecules are in constant random motion. 3. The average kinetic energy is ...

chemistry
How many mL of a 3.2M HCl solution would be needed to neutralize 150mL of 2.6M NaOH? Both NaOH and HCl are ‘strong’ acids/bases.

chemistry
If you have 1.00 M sodium chloride solution, and you have 300. mL of it, how many grams of sodium chloride are there?

Chemistry
an unknown compound is known to contain 30.34%N and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,N=14.1g/mol)

Chemistry
an unknown compound is known to contain 30.34%M and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,M=14.1g/mol)

Chemistry
1.what is the type of radiation (alpha,beta, or gamma) is represented by each of the following. A)the most penetrating type of radiation is B) When this particle is emitted an atom of carbon (atomic number 6) will change to an atom of nitrogen (atomic number 7) C)helium nuclei...

Chemistry
What is the total pressure of gas in a propane tank if propane has a partial pressure of 33.1 atm, nitrogen’s is 1.11 atm, and oxygen’s is 0.27 atm?

Chemistry
State the relationship between normality and molality

Chemistry
The system absorb 100 J of heat while the system does 100 J of work?

Chemistry
PLEASE HELP. Any help is appreciated. Thank you :) Name the following: 1) [Co(NH3)3I3] 2) [Cu(H2O)4]SO4 3) [CoCl(NH3)4]SO4 4) [Ni(H2O)4]2+ 5) Na[Pt(NH3)Cl5] Write formulas: 6) Tetraamminenickel(II) bromide 7) Tetrabromooplatinate(II) ion 8) Diamminedichloroplatinum (II) 9) ...

chemistry
name one raw material which sodium hydroxide is manufactured

chemistry
using dots and crosses to represent outermost electron draw diagram to show bonding of carbon four oxide and hydrogen peroxide

Chemistry
A 3.68 L sample of methane gas is collected at 36.0 degrees C. Predict the volume of the sample at 0 degrees C.

chemistry
What is the empirical formula of a compound that contains two moles of calcium, two moles of sulfur and eight moles of oxygen? A. CaS0 B. CaS02 C. CaSO4 D. Ca2S0 i think D

chemistry
How can Ka or Kb be used to determine if an acid is strong or weak?

chemistry
How much 0.020 M Ba(OH)2 is need to titrate 25.0 mL of 0.0030M HCl to the endpoint? I'm so confused; please help!

chemistry
0.1 mol of HCl is added to 1 L of water. What is [H+] and [OH-]? Thank you!

Chemistry
5.00 g of (Zn) was added to 0.800 moles of nitrate ion in acidic media. Calculate the volume of (NO) gas collected at STP. Zn(s) + No3^-(aq) ---------> ZN^2+(aq) + NO(g) (Must balance the reaction first). Thank you.

Chemistry
Identify the following as a complex ion or coordination compound: 1) [Co(NH3)3Cl3] 2) [Co(NH3)3Cl2]Cl 3) [Ni(NH3)4]^2+ 4) [Cu(NH3)4]^2+

Chemistry
Determine the hydronium ion concentration in a solution that is 0.00039 M HCl. Answer in units of M.

Chemistry
Determine the [OH−] in a 0.42 M solution of HClO4

Chemistry
How we differentiate bw citric acid and tartaric acid by identification test?

Chemistry
You have at your lab bench the following chemicals: NaH2PO4(s), Na3PO4(s), NH4Cl(s), CH3COONa (s), 1.00 M NaOH, 1.00 M HCl, and deionized water. You also have standard glassware available. Describe how you would make 1.0 L of the buffer with a pH of 7.50 using only the ...

Chemistry
For an exothermic reaction, what effect will increasing the temperature have on the equilibrium? A. There will be a shift toward the products. B. There will be a shift toward the reactants. C.There will not be a shift in equilibrium. D. Not enough information is given.

Chemistry
The solubility product for Ni(OH)2(s) is 1.6 ✕ 10−16. Calculate the value of ℰ° for the following half-reaction. Ni(OH)2 + 2 e− → Ni + 2 OH − I have no idea what equation to use or how to solve this problem

Chemistry
a hydrocarbon is burnt completely in excess oxygen. it is found that 1.00g of the hydrocarbon gives 2.93g carbon dioxide and 1.80g water. find the empirical formula of the hydrocarbon (H=1,C=12,O=16)

Chemistry
A 4g sugar cube(sucrose: C12H12O11) is dissolved in a 350ml teacup of 80 degree water. what will be the molality of the sugar solution.

chemistry
how many milliliters of the acetic acid (density:1.049g/ml)must be adding to 465m l of a 0 .0941m sodium hydroxide to obtain a buffer?

Chemistry
CH3OH(aq) + OH-(aq) ⇌ CH3O-(aq) + H2O(l) If methanol has pKa = 18.3, what is pKb for its conjugate base?

chemistry
A solution of potassium nitrate in water has a freezing point of -0.082◦C. What is the concentration of KNO3 in this solution? Kf = 1.86 ◦C/m for water.

chemistry
Is a phosphate group such as PO4 considered different than a phosphorous atom? Yes, because a phosphorous atom would not have the oxygen?

chemistry
Are triglycerides made of three ethene saturated or unsaturated?

Chemistry
There is a problem that I am completely stuck on and it deals with thermochemistry, specifically on calculating the amount of heat released in a reaction. The question is, "how much carbon dioxide must be produced to release 1200.0 J of energy?" using the balanced equation ...

chemistry
What are the applications coordination compounds

Chemistry
Please give me an example of problem with simple yet detailed solution oh how to compute the amount of diluted sodium hydroxide to neutralize a certain amount of diluted sulphuric acid.

Chemistry
A 10 ml of 98% sulfuric acid was diluted to 200 ml water. What volume of water will be added to 5 ml of 40% sodium hydroxide to netralize the diluted sulphuric acid?

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