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A neutral atom has the following characteristics:
- it has 3 valence electrons
- it's a main group element
- the highest quantum level occupied is n = 4
What is the identity of this atom? Enter either the element name or symbol (case insensitive).
Explain what volume of water (in mL) must be added to 450.0mL of 0.2074 M acid to make the concentration exactly 0.2000 M
Suppose you take a 25.00 mL sample of this hydrochloric acid solution. You then titrate it with a 0.1477 M sodium hydroxide solution.
The mass percent composition of the compound is 53.31% C, 11.19% H, and the rest is O. What is the molecular formula of the compound
Neon lamp spectrum shows many more distinct lines than that of hydrogen lamp. The reason is that
How many resonance peaks should be observed in the hydrogen - decoupled C 13 - NMR spectrum of each of the following compounds?
a) Provide the corresponding mRNA sequence and label the 5' and 3' ends: b) What are the first 3 amino acids coded by this gene?
What is the molarity of a solution prepared by dissolving 11.5g of solid NaOH in enough water to make 1.50L of solution?
If the average human body discharges 925.0g CO2 per day, how many moles of NaOHare needed each day for each person in the spacecraft?( 42.04 mol NaOH)
the balmer series of transitions for the hydrogen atom result in absorption of photons that all originate from the n 2
A 0.15 M aqueous solution of the weak acid HA at 25.0 C has a pH of 5.35. What is the value of Ka for HA ?
a lead storage battery needs sulfuric acid to function. the recommended minimum concentration of sulfuric acid for
A product label for 348 mg tablets of quinidine gluconate (m.w. 520) states that 71 % of the drug is present as quinidine base (m.w. 324). Calculate the milligrams of quinidine present in each tablet (round to the nearest mg).
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