When you need heat to make reaction happen it is endothermic.
If heat was on the right side then type of reaction would be exothermic.
A mixture is a system that is made up of two or more substances which are not combined chemically. A pure substance is a system that only has one substance. The following are classified as:
1.water : pure substance
<span>2.blood : mixture</span>
<span>3.the oceans : mixture</span>
<span>4.iron : pure substance
5.brass : mixture</span>
<span>6.uranium : pure substance</span>
<span>7.wine : mixture</span>
<span>8.leather : mixture</span>
<span>9.table salt (NaCl) : pure substance</span>
It means it is an ion. It has lost two protons making it a positive ion.
Answer:
B
Explanation:
u do the math and you will get the answer
Physical property of matter because you don't have to change its chemical make-up to tell, you can observe it using your senses and tools.
