Protons and neutrons are in the nucleus of an atom, whereas electrons are present in orbitals, or shells, outside an atom. Electrons are negatively charged, protons positive, and neutrons have no charge, or are neutral. Protons and neutrons have a relative mass of approx. 1 Atomic Mass Unit (amu), whereas electrons have a relative mass of approx 0.00055 amu.
Answer:
A leaf needs carbon dioxide and water for photosynthesis. ... For carbon dioxide to enter, the stomata on the surface of the leaf must be open. As you have seen, transpiration draws water from the roots into the leaf mesophyll.
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Answer:
The addition of nutrients to water by human activity is called artificial Eutrophication. Nonpoint-source-pollution comes from many small sources.
Explanation:
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The mass of 0.5 moles of the element : 60.241 g
<h3>Further explanation</h3>
Given
mass of 2 x 10²¹ number of atoms of an element is 0.4 g
Required
the mass of 0.5 mole
Solution
Find relative atomic mass of the element(Ar)
mol of 2 x 10²¹ atoms :
the mass of 0.5 moles :
