Magnesium oxide (MgO) forms when the metal burns in air. (a) If 1-25 9 of MgO contains 0.754 g of Mg, what is the mass ratio of magnesium to oxide? (b) How many grams of Mg are in 534 g of MgO?

Similarities and differences between covalent bonds and molecular interactions

If a substans is a mineral, how could you identify what type of mineral it is?

What volume would 3.00 moles of neon gas have at 295 K and 645 mmHg?

IPSPs (inhibitory postsynaptic potentials) a. block the efflux of potassium ions. b. are local hyperpolarizations. c. are local depolarizations. d. block the efflux of calcium ions. e. increase membrane permeability to sodium ions.

Approximately how many moles of N2 are in 200 moles of clean dry air?

Give reason: a. Fractionating columns with beads are used for fractional distillation b. Crystallisation is a better technique than evaporation

How can a gardener remedy soil that is overly acidic?

True or false everything has the same amount of energy?

4NH3 (g) + 502 (g) - >6H20g) + 4NOg) What is the enthalpy change for this reaction?

What diseases have increased public awareness of infection control over the past few years?