The answer is A.
A pure substance is pure, so it cannot be separated in most cases.
Ur answer is going to be francium
<em>what should be ph-value to be strong acid?</em>
<em>what should be ph-value to be strong acid?</em><em>c</em><em>.</em><em> Less than </em><em>2</em><em>.</em><em>.</em><em>.</em><em>.</em>
Answer:
Radiation
Explanation: Because greenhouses have glass and sun travels through glass .
