Answer:
On average, agriculture accounts for 70 percent of global freshwater withdrawals. In the last 30 years, food production has increased by more than 100 percent. FAO estimates that about 60 percent more food will be needed by 2050 to meet the food requirements of a growing global population.
Explanation:
Because i learnt this before and i aced a test about it dont worry
There are 2 different types of atoms there, that's why
Some of the individual pressures that are exerted by two or more gases.
A mixture is two or more substances that have been combined together but each substance is not changed chemically.Examples of mixtures include:<span>1. Sea water. This is a mixture of water and various salts.</span><span>2. Gunpowder. This is a mixture of potassium nitrate, sulfur and carbon. </span><span>3. Crude oil. This is a mixture of organic compounds, mainly hydrocarbons.</span><span>4. Ink. This is a mixture of colored dyes which can be separated using chromatography.</span><span>5. Dry air. Air is a mixture of nitrogen,oxygen, argon, carbon dioxide, neon and tiny traces of other gases.</span>
P = 750 kPa
p Ne = 230 kPa
p Ar = 250 kPa
p He = ?
p = p Ne + p Ar + p He
p He = 750 kPa - 250 kPa - 250 kPa = 270 kPa
Answer: The partial preassure of helium equals 270 kPa.
:-) ;-)