General Chemistry Answers

Carbonic acid, H₂CO₃, is unstable and rapidly decomposes to water and carbon dioxide. Write a balanced molecular chemical equation to describe the reaction. If 20.0 g of carbonic acid reacts completely, what mass of water forms?

In a similar investigation, a student following the procedure in this exercise was tasked with determining the identity of a hydriated chloride of tin. The percent water of hydration was previously determined to be 25.09%. Titration of a 0.2963g sample of the hydrated salt required 16.10 mL of 0.2098M AgNO3 to reach the equivalence point.

a) Determine mass and number of moles of water in the hydrate tin chloride sample

b) Determine the mass of the anhydrous tin chloride

c) Determine number of moles and the mass of chloride present in the sample based on the titration results

d) Determjne the mass and the number of moles of tin in the anhydrous tin chloride

e) Determine the mole ratio of chloride to tin in the anhydrous sample and it’s empirical formula

f) Determine the mole ratio of water to anhydrous tin chloride in the hydrated salt

g) Determine the empirical formula of the hydrated tin chloride and write its chemical name (systematic name)

How many kilograms of HF are needed to completely react with 1.01 kg of UO₂?

Determine the wavelength in nm of light emitted by an electron as it falls from the 4th to the 2nd energy level.

Answer must be in computer format for scientific notation, e.g. 5.4E5

How many grams of O2 will be formed from 3.76 grams of KCIO3

hard water sample is given and titrated with 0.002 N of sulphuric acid. Beneath are the concordant readings of titration recorded. where A represents the A and B represents the B. Calculate the Methyl orange

Alkalinity. (5)

(1) A = 0 ,(Phenolphthalein)

B = 14ml (Methyl orange)

(2) A = 0 ,(Phenolphthalein)

B 14.5ml (Methyl orange)

(3) A = 0,(Phenolphthalein)

B 14.3ml (Methyl orange)

If 29.6 g of NO and 26.9 g of O₂ react together, what is the mass in grams of NO₂ that can be formed via the reaction below?

2 NO (g) + O₂ (g) → 2 NO₂ (g)