Inorganic Chemistry Answers

A nitrogen gas container has a volume of 35.0 L. Calculate the mass of nitrogen in the container if the gas has a pressure of 1800 torr at 42°C

A gas is initially at volume 40.0 L, pressure 600 mmHg and temperature 35 °C. Calculate the final pressure of the gas in atm if the volume and temperature are changed to 2500 mL and 225 K, respectively

Suppose a has been prepared that is composed of carbon, hydrogen and nitrogen. When 0.1156 grams of this compound is reacted with oxygen, 0.1638 grams of carbon dioxide and 0.1676 grams of water are collected. If all the carbon in the compound is converted to carbon dioxide.

1) find the mass of carbon and hydrogen in the sample?

2) calculate the the percentage composition of carbon, hydrogen and nitrogen in the substance?

3) calculate the mass of hydrogen in the substance?

4) calculate the empirical formula of the sample.

5) suppose the molecular mass of the substance was 93 g/mol, find the molecular formula?

Differentiate coagulative necrosis and liquefactive necrosis as toxic manifestations when  strong acids and bases are ingested.

Write the mathematical expression for the reaction quotient, Qc, for each of the following reactions:

(a) CH4(g) + Cl2(g) ⇌ CH3Cl(g) + HCl(g)

(b) 2SO2(g) + O2(g) ⇌ 2SO3(g)

(c) BaSO3(s) ⇌ BaO(s) + SO2(g)

 (d) CH4(g) + 2O2(g) ⇌ CO2(g) + 2H2O(l)

(e) CO2(g) + H2(g) ⇌ CO(g) + H2O(g)

Lead metal is obtained from lead sulfide through the following reaction:

2PbS(s) + 2C(s) + 3O₂(g) → 2Pb(s) +2CO(g) + 2SO₂(g)

(a)If 100g of PbS is reacted with excess C and O_2, calculate the mass of lead metal obtained. ( 5 )

(b)Suppose 100 g of PbS is reacted with 4g of C and 20g O₂.

Find the limiting reactant for this reaction.

( 4 )

(c)For question (b) above, calculate the mass of lead metal obtained. ( 4 )

(d)By referring to the question (c) above, If 31.2g Pb is obtained as the yield. Calculate the percentage of yield. ( 2 )

(e)Calculate mass of oxygen is needed to produce 500g of lead metal.

Suppose 100 g of PbS is reacted with 4g of C and 20g O₂.

Find the limiting reactant for this reaction.   

The chlorine-containing narcotic drug pentaerythritol chloral has 21.51% C, 2.22% H, and 17.64% O, by mass, as its other elements. Its molecular mass is 726 u. What are the empirical and molecular formulas of pentaerythritol chloral?

The volatile liquid ethyl mercaptan, C₂H₆S, is one of the most odoriferous substances known. It is sometimes added to natural gas to make gas leaks detectable. How many C₂H₆S molecules are contained in a 1.0 mL sample? The density of liquid ethyl mercaptan is 0.84 g/mL.

1.      What is the oxidation state of the underlined element in (a) P₄, (b) Al₂O₃, (c) MnO₄ ^-, (d) NaH, (e) H₂O₂; (f) Fe₃O₄?