Other Chemistry Answers

Draw a dot and cross diagram showing outer electrons only to explain the formation of rubidium oxide, Rb₂O from rubidium and oxygen atoms. 

 Draw a dot and cross diagram showing outer electrons only to show the formation of carbon disulfide, CS₂from carbon and sulphur atoms.

If steel wool (iron) is heated until it glows and is placed in a bottle containing pure oxygen, the iron reacts to produce iron (III) oxide.

4 Fe + 3 O2 → 2 Fe2O3 

a) If 1.25 g of iron is heated and placed in a bottle containing 0.500 grams of oxygen gas how many grams of iron (III) oxide should be produced?

2Al     +    3H2SO4     →    Al2(SO4)3     +  3H2

 How many atoms of Mb in the molecule (Mb₃Cp)₅?

3) 2 MgO(s)  --> 2 Mg (s) + O2(g)                   

H = +72.3 kJ

a.Endothermic or exothermic? _______________________

b.Heat is released or absorbed?_______________________

c.Temperature would go up or down? ________________

d.Rewrite the equation putting the heat in as a reactant or product.

1) The reaction of magnesium with sulfuric acid was carried out in a calorimeter. This reaction caused the temperature of 55. grams of liquid water, within the calorimeter, to raise from 1.0^oC to 28.^oC. Calculate the energy associated with this reaction.

What amount of heat is required to increase the temperature of 15.0 g of mercury from 22.3°C to 36.1°C?  The specific heat of mercury is 0.140 J/g°C.

What is the pressure (in atm) exerted by 5.00 moles of nitrogen gas contained in a 82.1 Liter container at 400 K? Only type in the number for your answer. 

Balloon has a volume of 600-mL at temperature of 300 K. If the temperature of the balloon drops to 250 K, find the volume (in mL)