Category: Chemistry

Rearrange the following with the smallest on top and largest on the bottom. Universe Solar System Earth’s Moon Sun Earth Milky Way Galaxy​

A chemical process used to produce ethanol as a fuel additive was expected to produce 5,000 kilograms of ethanol based on the amounts of starting materials used, but only 4,760 kilograms were produced. What was the percent yield for ethanol in this process? A)1.09 percent B)4.80 percent C)95.2 percent D)105 percent

KMnO4 + H2S + HCl KCl + MnCl2 + H2O + S8 Did Cl change oxidation number? Yes, no Did Oxygen change oxidation number? Yes, no Did H change oxidation number? Yes, no Did Mn change oxidation number? Yes, no Did S change oxidation number? Yes, no oxidizing agent = K, O, Mn, S reducing agent = Mn, H, Cl, S

How much energy is needed for the reaction of 1.22 moles of H3BO3 with 5.67 moles of hydrogen?

2 H3BO3 + 6 H2 B2H6 + 6 H2O ΔH = +493 kJ

A 52.0-mL volume of 0.35 M CH3COOH (Ka=1.8×10−5) is titrated with 0.40 M NaOH. Calculate the pH after the addition of 17.0 mL of NaOH.

Express your answer numerically.

When 9.78×10^23 atoms of silver react with gold (III) nitrate, how many moles of gold are produced?

Need quick

how many grams of copper sulfate could be produced from 9.9 grams of copper 2 chloride reacting with excess sulfuric acid?CuCl2+H2SO4 = CuSO4+2HCl (g)​

A rock that falls off a cliff represents both potential and kinetic energy. Which statement best represents the energy transformation involved in this scenario? As the potential energy decreases, the kinetic energy decreases. As the potential energy decreases, the kinetic energy decreases. As the potential energy increases, the kinetic energy increases. As the potential energy increases, the kinetic energy increases. As the potential energy decreases, the kinetic energy increases. As the potential energy decreases, the kinetic energy increases. As the potential energy increases, the kinetic energy stays the same

Suppose you have a mixture of iron filings, sand, and sugar and you want to separate the three. Fill in the materials you expect to see at each step as you perform the actions shown to separate them. The materials you may expect to see are: iron filings, sand, sugar, and sugar water.

Which substance can form a coordinate covalent bond with a hydrogen ion?

a. H2
b. He
c. NH3
d. CH4