06/01/23

Chemistry question

The atomic molar mass of a hypothetical element X is 100 u. It is found that the 50.0 g of X combines with 32.0 g of oxygen. What is the simplest formula for the oxide of X?Atomic Molar Mass of... more
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06/01/23

Need help with this
A container holds a mixture of 3.01 x 10^23 molecules of H22 gas, 1.20 x 10^24 molecules of CO22 gas, and 1.50 x 10^24 molecules O22. If the total pressure of the container is 1.00atm, what is the... more
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06/01/23

Which of these groups of elements would be expected to have similar chemical properties?

F, Cl, BrC, Ge, PbP, S, ArPt, Au, Hg
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06/01/23

Which of these groups of elements would be expected to have similar chemical properties?

F, Cl, BrC, Ge, PbP, S, ArPt, Au, Hg
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06/01/23

If 7 Ms and 4 N are given you to create moles. How many are able to be created? What are the excess and limiting reactants?
Ms and N are fake elements in this scenario. It takes 2 Ms and 1 N to create a mole.
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06/01/23

If 100gof fabric and 200g of stuff are given to you to create moles. How many moles are you able to create? What is the excess and limiting reactants?
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05/30/23

Chemistry question
The compound more soluble in acidic solution than in just water.AgCIAgFAgBrAgOHcould you explain briefly which option is correct?
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05/30/23

Chemistry, Acid Base Titration
What is the pH if you have 1.0M weak acid with pKa = 5.55?If you add 20.0mL of this weak acid with 20.0mL of 1.0MNaOH, a strong base, what would be the resulting pH?Please explain the steps thanks.
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05/30/23

Hess' Law Chemistry
When using Hess’s Law to calculate rnthalpy of a rxn, what does a negative or positive (delta)H mean? When do you add or subtract and why?
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05/29/23

Chemistry question

Determine the equilibrium concentrations of both Cu(NH3)4 2+ and Cu2+ in a solution made initially to be 0.010 M Cu(NO3)2 and 0.100 M NH3. The Kf for Cu(NH3)4 2+ is 1.0 x 10^-12
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05/29/23

Is work function of a metal the same as ionisation energy?
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05/29/23

Chemistry question

Which ion has the largest radius? (A) CI- (B) F- (C) K+ (D) Ca2+ could you explain which option is the correct answer?
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05/29/23

Chemistry question

In which pair of particles is the first member larger than the second member?(A) Li + ; Be2+(B) Li + ; Li(C) Li + ; Na +(D) Be; MgCould you explain which option is the correct answer
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05/29/23

Calculate the heat involve 2.0g of (NaOH) undergoes a temperature change of 20°c
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05/26/23

Determine the empirical formula and the molecular formula for Ibuprofen.

buprofen, the pain reliever in Advil and Motrin contains 75.69% C, 8.80% H, and 15.51% O by mass. The molecular mass is 206.3 g/mol. Determine the empirical formula and the molecular formula for... more
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05/26/23

The total mass of aluminum hydroxide at the end of the reaction was 0.94g. What was the percent yield of this experiment?
A student in a chemistry lab mixes 13.8g of aluminum sulfate with 2.04g calcium hydroxide to produce aluminum hydroxide and calcium sulfate.The unbalanced reaction is: Al2(SO4)3 + Ca(OH)2  Al(OH)3+... more
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05/26/23

What mass of aluminum hydroxide is produced?
A student in a chemistry lab mixes 13.8g of aluminum sulfate with 2.04g calcium hydroxide to produce aluminum hydroxide and calcium sulfate.The unbalanced reaction is: Al2(SO4)3 + Ca(OH)2  Al(OH)3+... more
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05/25/23

what is the expression for keq for: 3a(g)+1b(g)<->2c(g)+2d(g)
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05/24/23

How many grams of \textrm{Ag}_2 \textrm{O} are required to produce [var:O2] L oxygen gas via decomposition at 102.3 kPa and 175°C? 2

2Ag2O=4Ag+O2
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05/24/23

At 25 C, Keq = 0.90 for the reaction: H2O + Cl2O = 2HOCl (all gases)
Calculate the concentrations of all species at equilibrium a) if 1.0g of H2O and 4.83 g of Cl2O are mixed in a 1-L flask. b) 1.0 mol of pure HOCl is placed in a 2.0-L flask
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05/23/23

Ammonia (NH3) clouds are present around some planets. Calculate the number of moles of ammonia produced by the reaction of 5.4 g of hydrogen with an excess of nitrogen. N2 + 3 H2 ->2 NH3
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05/22/23

If a buffer solution is 0.540 M in a weak acid (𝐾a=7.4×10−6) and 0.220 M in its conjugate base, what is the pH?
If a buffer solution is 0.540 M in a weak acid (𝐾a=7.4×10−6) and 0.220 M in its conjugate base, what is the pH?
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05/21/23

How to calculate the absolute rate of diffusion for 2 gases under the same conditions
The absolute rate of diffusion of hydrochloric gas is found to be 1.40 × 10-4 m/s. What is the absolute rate of diffusion of ammonia gas (in m/s) under the same conditions?
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05/21/23

chem 1 please help
A chemist has a block of iron metal (density is 7.87 g/mL). The block weighs 2.70 g. What is the volume of the iron block in mL?
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05/21/23

Molar Enthalpy of Reaction for Mg(s)
Using 50.0 mL of 1.0 mol/L hydrochloric acid (HCl) and the specific heat of water is 4.19J/g°CCalculate the molar enthalpy of reaction for Mg(s) for each of the 3 trials.Trial 1: Mass of Mg(s)=... more
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