General Chemistry Answers

Max weighs 31 kg. If the dose of the clavulanic acid is 2.7 mg/kg, how many moles of clavulanic acid were given?

 how many grams of NO are produced when 2.15 mol of O2 reacts

1.  How many moles of magnesium are required to react with 36.70 moles of hydrochloric acid? 

Moles-Moles

The balanced equation for this reaction is:       Mg + 2HCl   →   MgCl2 +    H2       

2.  If 6.0 l moles of water, H2O, were formed during this reaction, how many grams of barium oxide, BaO, were used? 

moles-moles-Grams

Balanced Chemical Equation:     BaO (s)  +  H2SO4 (aq) →  BaSO4 (s) +     H2O (g)

3.  What mass of sodium chloride is produced when chlorine reacts with 3.65 grams of sodium 

iodide according to the balanced equation:      2NaI  +   Cl2   →    2NaCl  +     I2 

Grams-moles-moles-grams

4.  How many grams of Fe2O3 will be produced if 0.18 grams of Fe reacts? 

     The UNBALANCED equation for this reaction is:    4Fe + 3O2 → 2Fe2O3

In a blast furnace, carbon monoxide (CO) is used to reduce ferric oxide (Fe₂O₃) to metallic iron, with carbon dioxide as a by-product. The equilibrium constant K_p for the redox reaction is 19.9 at 1000 K. If the equilibrium pressure of CO² is 2.4 atm, how much pressure is exerted by pressure?

Fe₂O₃ + 3CO(g) ⇌ 2Fe(s) + 3CO₂(g)

97.5mL of gas is collected over water at 300C and 785mmHg. What is the pressure of the dry gas at 25.0C in a 105mL container?

8.75g of solid sodium carbonate is mixed with 125 ml of 0.415M phosphoric acid.

Calculate the number of moles of carbon dioxide gas formed during the reaction

If 11.3345 g of a solid displaces 1.45 cm3 of water. What is the density of the solid with a correct number of significant figures?

unbalanced

NH₃ + HOCl → NCl₃ + H₂O

If 40.5 grams of HOCl react with an excess of NH₃ how many moles of NCl₃ will form? 

Determine the mass of 20.0 cubic feet of aluminum whose density is

2.70 g/cm", expressed in kilograms. (b) Diamonds are measured in carats,

and 1 carat = 0.200g. The density of diamond is 3.51 g/cm°. What is the

volume of a 5.0-carat diamond, expressed in liters?

Find the density of a hydrogen nucleus in grams per cubic centimeters,

given that the diameter of this nucleus is 1.0*10 pm and the mass is 1.67

* 10-24g. (Hint Volume of a sphere of radius r is far.)