General Chemistry Answers

A solution is prepared by dissolving 120 grams of NaCl in 450 grams of water. Find the freezing and boiling points of this solution. (Molar mass of NaCl is 58.44 g/mol)

A gas made up of homonuclear diatomic molecules escapes through a pinhole 0.268 times as fast as H2 gas. Write the chemical formula of the gas

Which cannot be classified as arrhenius acid?

Determine the number of particle , number of moles and mass , show the law of conservation of mass is observed4Al + 3O₂   →    2Al₂O₃(molar mass of  O = 16 g/mol   Al= 27g/mol)

Determine the mass of PbCrO₄  are produced when 0.25mol of K₂CrO₄

K₂CrO₄ + Pb(NO)₃ →   PbCrO₄ + 2KNO₃

(molar mass of  PbCrO₄= 323g/mol)

Determine the number of particle , number of moles and mass , show the law of conservation of mass is observed

4Al + 3O₂   →    2Al₂O₃

(molar mass of  O = 16 g/mol   Al= 27g/mol)

2 Al + 2 NaOH + 2H2O to 2 NaAlO2 + 3H2

if 126.4 g of NaOH is 97.7 g of Al are made of to react

a. How

many moles of NaAlO2 is produced if 126,4 g of NaOH reacts completely?

b. How many grams of NaAlO2 is produced using the same amount of NaOH?

c. Which reactant is the limiting reagent?

d How many grams of the excess reagent is left?​

20.0 mL of 9.00 Molar sulfuric acid is diluted to a total volume of 3.00 L. What is the concentration of the dilute solution?

explain why 0.20 M solutions of hydrobromic acid and hydrochloric acid have the same pH values but 0.20 M solutions of oxalic acid and hydrochloric acid have different pH values.

Methanol (ch3oh), also called methyl alcohol, is the simplest alcohol. it is used as a fuel in race cars and is a potential replacement for gasoline. methanol can be manufactured by combination of gaseous carbon monoxide and hydrogen. suppose 68.5 kg co(g) is reacted with 8.60 kg h2(g). calculate the theoretical yield of methanol. if 3.57 × 104 g ch3oh is actually produced, what is the percent yield of methanol?