Los elementos artificiales son extraido de la naturaleza en su mayoria?

21.7 mL of gas at 98.8 kPa is allowed to expand at constant temperature into a 52.7 mL container. What is the new pressure of the gas? kPa.

If a person walks 1.3m/s how far will that person walk in 300 s?

How many molecules of H2O are equivalent to 97.2g H2O

If the frequency of a wave doubles, which of the following could be true? A. the pitch gets lower B. the pitch gets higher C. the pitch does not change D. the pitch becomes negative

How many moles of mercury atoms are in 5.418 x 1023 atoms of mercury? moles

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.

How does electronegativity affect the polarity of the bond between two atoms?

How much heat (energy) would need to be absorbed by 1.5 g of liquid water to cause a temperature change of 30.45 °C? The specific heat of water is 4.18 J/gºC.

What happens when electrons are passed from one atom to a more electronegative atom?

Calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. calculate the k sp for zinc hydroxide if the solubility of zn (oh) 2 in pure water is 2.1 * 10-4 g/l. 2.9 * 10-3 1.5 * 10-3 9.9 * 10-18 3.8 * 10-17