04/21/20

What pressure (in kPa) would be exerted by 0.86 mol of a gas in a 12.2 L container at 22C?

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04/21/20

If 0.681 g of an unidentified gas is placed in a 442 mL vessel at 49C, it produces a pressure of 0.629 atm. Find the molar mass of the gas.

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04/21/20

Gas law Chemistry
1) How many liters are occupied by 1.05 mol of nitrogen at 198◦C and 0.564 atm pressure?2) A gas sample occupies 4.71 L at 39◦C. What is the pressure given that there are 1.18 mol of gas in the... more
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04/21/20

What is the mass of 3.01 x 10²² molecules of carbon dioxide at STP?
using dimensional analysis
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04/21/20

What volume, in liters, at STP, is occupied by 3.30 X 10²³ molecules of oxygen gas?
using dimensional analysis
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04/21/20

Ascorbic acid ( H2C6H6O6 ) is a diprotic acid. The acid dissocation constants for H2C6H6O6 are 𝐾a1=8.00×10−5 and 𝐾a2=1.60×10−12. Determine the pH of a 0.135 M solution of ascorbic acid.
Determine the equilibrium concentrations of all species in the solution.ph[H2C6H6O6][HC6H6O−6][C6H6O2−6]
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04/21/20

Gas laws chemistry
1) NH3 gas is pumped into the reservoir of a refrigeration unit at a pressure of 3.50 atm. The capacity of the reservoir is 10.4 L. The temperature is 42.7◦C. What is the mass of the gas?2) What... more
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04/21/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
How many mL of 0.427 M HBr are needed to dissolve 6.83 g of MgCO3?2HBr(aq) + MgCO3(s)  MgBr2(aq) + H2O(l) + CO2(g)_______mL
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04/21/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
If 2.00 mL of 0.0295 M CuSO4  is diluted to 10.0 mL with pure water, what is the molar concentration of copper(II) sulfate in the diluted solution?Molar concentration =_____ M
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04/21/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
If you dilute 35.0 mL of 1.75 M hydrochloric acid to 600. mL, what is the molar concentration of the dilute acid?Molar concentration=____M
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04/21/20

chemistry homework

What is the H3O+ concentration of a solution with a pH of 3.0? Enter your answer in scientific notation. Be sure to answer all parts.
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04/21/20

triprotic acid and buffer
phosphoric acid (h₃po₄) is a triprotic acid with pka values of 2.12, 7.21, and 12.32. it is a useful buffer solution for ph values near the pka values. you have a 0.100 m solution of phosphate... more
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04/21/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS S
An unknown compound has the formula CxHyO.You burn 0.1322 g of the compound and isolate 0.3228g of CO2 and 0.1321g of H2O . What is the empirical formula of the compound? If the molar mass is 72.1... more
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04/21/20

dalton's law of partial pressure
A 1.00  flask is filled with 1.45  of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.000  .What is the partial pressure of ethane, P ethane in the... more
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04/21/20

The 𝐾sp of copper(II) carbonate, CuCO3, is 1.4×10−10 . Calculate the molar solubility, 𝑆 , of this compound.
How do I solve this question?
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04/21/20

college chemistry

    H2PO4- +  H2O -->  H3PO4 + OH-the acid is the base is the conjugate acid is the conjugate base is
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04/21/20

College chemistry
What is the equation for expressing pH? pOH?
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04/21/20

College Chemistry

What is the pH of 0.75 M hydrochloric acid solution?
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04/20/20

of the following, which is/ are the repulsive force(s) in CH4
I. Bonding pair - bonding pairII. lone-pair - bonding pairIII. Lone pair - lone pair
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04/20/20

CHAPTER 4 - STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
Styrene, the building block of polystyrene, consists of only C and H. If 0.397 g of styrene is burned in oxygen and produces 1.342 g of CO2 and 0.275 g of H2O what is the empirical formula of... more
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04/20/20

STOICHIOMETRY: QUANTITATIVE INFORMATION ABOUT CHEMICAL REACTIONS
A 12.3 g sample of an aqueous solution of hydrochloric acid contains an unknown amount of the acid.If 11.3 mL of 1.46 M sodium hydroxide are required to neutralize the hydrochloric acid, what is... more
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04/20/20

Predict the products, balance, and write the FULL and NET ionic equations when given the reaction equation: Na₂CO₃ (aq) + Al(NO₃)₃ (aq) ->
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04/20/20

Balance the equation and write the FULL and NET ionic equations when given the reaction equation: HCl (aq) + Sr(OH)₂ (aq) -> SrCl₂ (aq) + H₂O (l)
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04/20/20

If 250 ml of NaOH solution neutralizes 0.5 L of 3.0*10^-1 M H3PO4, what is the molarity of NaOH solution?
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04/20/20

26. Chemical Equations: Molecular Picture
1) Consider the following unbalanced particulate representation of a chemical equation: N = blue O = red Write a balanced chemical equation for this reaction, using the smallest integer... more
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