What's a simple machine

From the table of data, substance C will have the least of the original amount remaining after 30 days even though it started with the most. What is the best explanation for this answer?

In the manufacture of ammonia, nitrogen, and hydrogen gases react over an iron/potassium oxide catalyst to give ammonia. hydrogen is the expensive reagent as nitrogen can be obtained from the air.

What is Gallium Nitrite

Determine the speed of sound at 20 oC in (a) air, (b) helium, and (c) natural gas (methane). Express your answer in m/s.

How can you which molecule is positive and negative in a dipole-dipole relationship?

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?