Which element is present in every organic compound?

(1) carbon (3) nitrogen

(2) fluorine (4) oxygen

Is raisin bran with milk a mixture

What property of elements causes waters polarity

Consider a 1.0 L cotainer of neon gas at STP. Will the averageklinetic energy, average velocity, and frequency of collisions ofgas molecules with the walls of the container increase, decrease, or remain the same under each of the following

Which electron configuration represents an excited state for a potassium atom? (1) 2-8-7-1 (3) 2-8-8-1 (2) 2-8-7-2 (4) 2-8-8-2

How much heat, in kJ, is required to convert 36.82 grams of water at 100°C to steam? (ΔHvap = 40.657 kJ/mol.)

If a net force of 5.0 forward acts on a 0.60 kg toy car, what is it's acceleration?

Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting

A gas expands in volume from 26.7 to 89.3 mL at constant temperature. Calculate the work done (in joules) if the gas expands (a) against a vacuum, (b) against a constant pressure of 1.5 atm, (c) against a constant pressure of 2.8 atm. (1L⋅atm=101.

Beta particles are emitted from radioactive atom p when it disintegrates spontaneously to form non radioactive atom q. which of these statements is most likely correct about atom p and atom q?

What should I do for the science fair?