06/26/20
Solubility from ksp and molarity
What is the solubility of La(IO₃)₃ in a solution that contains 0.150 M La³⁺ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)
06/25/20
Decide which of the following acids is strongest and explain why: CF3COOH, CCl3COOH, CBr3COOH
Decide which of the following acids is strongest and explain why: CF3COOH, CCl3COOH, CBr3COOH
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06/25/20
A. An element with the valence electron configuration 5s2 5s5 would form a monatomic ion with a charge of_____ .
A. An element with the valence electron configuration 5s2 5s5 would form a monatomic ion with a charge of_____ . In order to form this ion, the element will____ (lose/gain) _____electron(s)...
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06/24/20
find the answer
find width the dimensions of a shipping box given that the length is twice the width the height is 8 inches and the volume is 1600 inches
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06/24/20
Calculate the pH of a mixture of 100 cm3 of 0.500 mol dm–3 methanoic acid and 50 cm3 of 0.100 mol dm–3 sodium methanoate. (pKa methanoic acid = 3.75)
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06/24/20
100 cm3 of water is added to 20 cm3 of 0.100 mol dm–3 sulfuric acid. Calculate the pH of the mixture
06/23/20
A sample of an ideal gas at 1.00 atm and a volume of 1.95 L was placed in a weighted balloon and dropped into the ocean.
(question continued) As the sample descended, the water pressure compressed the balloon and reduced its volume. As the sample descended, the water pressure compressed the balloon and reduced its...
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06/23/20
A hot air balloon is filled with 1.39×106 L of an ideal gas on a cool morning ( 11 ∘C). The air is heated to 119 ∘C.
What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon?
06/16/20
What type of reaction is represented by the following equation: SiCl₄(l) + 2Mg(s) → 2MgCl₂(s) + Si(s)
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06/08/20
pH solution Question
What is the pH of a solution that has a hydroxide ion concentration of 1.0 x 10^-2 M?
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07/26/19
A compound containing nitrogen and oxygen was found in pop. What would the empirical formula of the compound be if there was 21g of nitrogen to every 16g of oxygen in the compound?
What would the molecular formula of the compound be if it was found that the molar mass of the compound was 148 g/mol?
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07/25/19
The percent mass per volume, % (m/v), of a dextrose solution containing 6.50 g of dextrose in 225 mL of solution. What is the percent mass per volume concentration?
the mass is not technically the same as weight, but the abbreviation % (w/v) is often used interchangeably with % (m/v).
07/11/19
Why is the iodide anion a good nucleophile but a poor base?
The $\\mathrm{pK_{aH}}$ of $\\ce I^-$ is very low which indicated that it is not favourable for it to bond with a proton. However, why would it be likely to bond with any other atom (mostly carbon...
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07/10/19
Why does cyclopropane react with bromine?
In my exam, I was asked why cyclopropane could decolourise bromine water (indicating that it reacted with the bromine).
All I could guess was that it is related to the high angle strain in...
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07/05/19
Can you have a meta stereocenter?
Imagine a compound such as 1,3-dibromo-1,2,3-trichloropropane. Since the first and third carbons are attached to four different groups, they are both chiral centers. Assuming that both of these...
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06/24/19
Difference in the functioning of alkaline and acidified KMnO4?
What is the difference in the functioning of alkaline and acidified $\\ce{KMnO4}$ as a reagent in organic chemistry?
E.g., in the oxidation of a primary alcohol to carboxylic acid, we use...
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