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serg [7]
3 years ago
14

What is the volume of ethyl alcohol solution in a a 70% 250 ml

Biology
1 answer:
mafiozo [28]3 years ago
4 0

175 ml Ethyl Alcohol

250 ml x .70 (70% alcohol) = 175 ml, leaving the other 30% out (75ml)

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What two elements have the same number of energy level (shells)?
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Answer:

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The modern periodic table is organized into eight vertical columns known as groups and seven horizontal rows known as periods. The atomic number ( number of protons in the nucleus) of elements increases when moving across the periodic table from left to right. The horizontal rows or periods represents an energy levels or the number of electron shells in an element. Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Elements belonging to the same period have the same number of energy level or shells. For example, the elements belonging to Period 2 include lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. These all have the same number of energy level of 2.

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