How many moles of oxygen are needed to combine with 87 g of lithium according to the given equation: 4 Li + O2 - -> 2 Li2O

Why was Mendeleev able to use his periodic table to make predictions

When you look at the ground, you seem to be at rest. Why is this? Why does someone in space see you moving in a circle?

A 5.18-g sample of a mixture of MgBr2 (s) and sucrose (C12H22O11) is dissolved in water and all the bromide is precipitated as AgBr (s). If the AgBr (s) precipitate has a mass of 7.65 g, what is the mass percent of MgBr2 (s) in the mixture?

How many miles of H2SO4 are present in 1.63 liters of a 0.954 M solution

Where in the ocean Basin can hydrothermal vents be found

A potassium bromide solution is 7.55% potassium bromide by mass and its density is 1.03 g/ml. part a what mass of potassium bromide is contained in 35.8 ml of the solution?

If you have 7 boxes to be moved, the same amount of work is done whether 5 men do the work or 1 person does it. TrueFalse

Ammonia is a weak base. if the initial concentration of ammonia is 0.150 m and the equilibrium concentration of hydroxide is 0.0016m, calculate kb for ammonia.

Determine which change of state is being described in this passage. As the temperature decreases, the atoms lose energy. The atoms begin to move slower. They are held together by attractive forces, but are still able to slide past each other.

When the amount of energy required to break bonds in the reactants is less than the amount of energy released in forming bonds in the products, the process has a negative change in enthalpy (-ΔH). True False