Why is it important for scientists to use a classification

The orbits of the planets are ellipses with the sun at one focus

the solubility in mol/dm3 of 20.2g of potassium trioxonitrate (V) dissolved in 100g of water at room temperature is

Molecules of two substances at the same temperature have the same: A) average kinetic energy. B) heat content. C) distance between the molecules. D) average potential energy.

The nucleus of an atom ok K-42 contains

A scientist mines and processes a nonrenewable resource and obtains copper, which is a metal element. Which resource is the scientist most likely working with? coal ores petroleum natural gas

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?