Can two different samples of the same substance have different physical properties? Chemical properties?

What organic compound is phosphorus found in?

A man hits a golf ball (0.2 kg) which accelerates at a rate of 29 m/s². What amount of force acted on the ball?

2.15 Liters of helium gas at a pressure of 58 kPa and a temperature of 25 degrees celsius, what is the new volume at stp?

Why is a pyramid used to describe the energy available at different layers in an ecosystem

An atom is electrically neutral because the A) number of protons equals the number of electrons B) number of protons equals the number of neutrons C) ratio of the number of neutrons to the number of electrons is 1:1 D) ratio of the number of

Which exters stronger gravitational pull on earth, the sun or the moon?

How many atoms are in 5.548 g of thorium

1. Barium (Ba) is larger than magnesium (Mg) because barium appears below magnesium on the periodic table. Explain why barium (Ba) is larger than magnesium (Mg). 2.

Solution A has a pH of 3 and solution Z has a pH of 6. How many times greater is the hydronium ion concentration in solution A than the hydronium ion concentration in solution Z? (1) 100 (3) 3 (2) 2 (4) 1000

Based on the leaf cross section shown above what do you know about the plant from which it came