General Chemistry Answers

Calculate the enthalpy change, in kjmol of Mg for the reaction at constant pressure,given temperature= 29.0 c= 4.20 Jg-1°C-1 the density of dilut HCl is 1.0 gcm-3

If 126.4 g of NaOH is 97.7 g of AL are made to react.

A)how many moles of NaAlo2 os prpdiced if 126.4 g of Naoh reacts comoletely

Naturally occurring magnesium exists as a mixture of three isotopes. These isotopes are Mg-24 (78.70%, 23.985 u), Mg-25 (10.13%, 24.985 u), and Mg-26 (11.17%, 25.983 u). Calculate the average atomic mass of magnesium.

An atom has a mass number of 32 and 17 neutrons. What is the atomic number of this atom

How many grams of methane must you burn (CH4 + 2O₂ DH = -891 kJ/mole) to heat 2.2 kilograms of water (C = 4.18 J/g C) 46.0°

1Al + S₈ + E -----> Solve and balance. I need help with this please

Calculate the molecular formula of an organic compound containing 72.31% carbon and 7.69% hydrogen by mass if it's relative molar mass is 78. (C=12,H=1)

A given mass of oxygen is 0.15dm³ at 60°c 1.01x105Nm² , find the pressure at the same temperature if its volume is changed to 0.30dm³

A student reacts 0.50 mol of sodium with water. The water’s temperature increases during the reaction. The student calculates the

that The sodium released 180 kJ of energy. What is the enthalpy (triangle H) for the reaction in kJ/mol

What is the bond formed between two phosphorus elements?