What are waves used to penetrate solids and use in doctors offices

4.19-g sample of nitrous oxide (an anesthetic, sometimes called laughing gas) contains 5.73 * 1022 N2O molecules. How many nitrogen atoms?

If a farmer wants to increase the health of his crops, he could apply a nitrogen-based fertilizer. why is nitrogen important to plants?

Describe the type of force which exists between particles in an ideal gas. A) There are strong attractive and repulsive forces between gas particles. B) There are no attractive or repulsive forces between gas particles.

A sample of CO2 gas with 10.0 L of volume and 60.0 torr of pressure is mixed with a sample of O2 gas with 20.0 L of volume and 50.0 torr of pressure, in a large container with 30.0 L of volume. What is the final volume of O2?

What are the products of the neutralization reaction between hydrochloric acid and magnesium hydroxide?

Prevailing winds peru

Foods labeled "fat free" can actually contain less than 0.5 grams of fat.

Plants make their own food. The chemical reaction for this process is shown in the equation below. CO2 + H2O + energy → C6H1206 + O2 What are the products in this chemical reaction? O A. C6H1206 + energy O B. H20 + energy O C. CoH1206+02 O D.

Using ohm's law, explain how voltage changes in relation to current, assuming that resistance remains constant.

An average copper penny minted in the 1960s contained about 3.000 g of copper. how much chalcopyrite had be mined to produce 100 pennies?