To extract hydrogen from water, researchers insert two electrodes across the water and pass current, which can separate the hydrogen from water. The process called electrolysis of water. ... An electric field applied through the cobalt oxide to water molecules resulted in the electrolysis of water
Pumice rocks are formed due to the air that is trapped in
between the rocks, a body of magma spurting out with dissolved gas under
pressure. As the magma cracks through the Earth’s surface, the sudden pressure drop
causes the gas to come out of the solution. The flash of gas form the vent slices
the magma and blows it out as a molten lather. The lather hastily solidifies as
it flies into the air and falls back to Earth as pieces of pumice.
Answer:
1is the answer to that one day F
Answer:
1.28 × 10²² atoms
Step-by-step explanation:
A common formula for determining the amount of sample remaining (N) in terms of its half-life (t_½) is
N =N₀(½)ⁿ
where n is the number of half-lives
n = t/t_½
=====
Data:
N₀ = 6.02 × 10²³ atoms
t = 20 da
t_½ = 3.6 da
=====
The calculation:
N₀ =6.02 × 10²³ atoms
n = 20/3.6
n= 5.56
N = 6.02 × 10²³ × (½)^5.56
N = 6.02 × 10²³ × 0.0212
N = 1.28 × 10²² atoms
Plants and minerals
Plants need to take in a number of elements to stay alive.
The most important are:
•Carbon
•Hydrogen
•Oxygen
Plants get hydrogen and oxygen from water in the soil, and carbon and oxygen from carbon dioxide and oxygen in the atmosphere. Water and carbon dioxide are used to synthesise food during photosynthesis.
Oxygen is used to release energy from food during respiration.
In addition to these three elements, plants need a number of minerals for healthy growth. These are absorbed through the roots as mineral ions dissolved in the soil water.
Two important mineral ions needed by plants are:
Nitrate - for making amino acids, which are needed to make proteins
Magnesium - for making chlorophyll
If a plant does not get enough minerals, its growth will be poor. It will suffer from deficiency symptoms:
Deficient in nitrate - it will suffer from stunted growth
Deficient in magnesium - its leaves will turn yellow.