Which of the following equations is not balanced? O 2Mg + O2 ---> 2Mgo
O 2NO+ O2 ---> 2NO2
O CaCO3---> CaO + CO2
O 2NaHCO3 + H2SO4 ---> Na2SO4 + 2H2O + CO2

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?