Answer:
oxygen is an element because it is a pure substance which cannot be split into simpler substances by chemical means
Answer: 4
Explanation:
4 is the only one that has to products as well as having the plus at the bottom
Answer:
(C) the physical state of each reactant and product
Explanation:
Hope this helps
For example, at sea level the atmospheric pressure is 760 mm Hg<span> (also expressed as 760 torr, 101325 Pa, 101.3 kPa, 1013.25 mbar or 14.696 psi) and pure </span>water<span> boils at 100°C. However, in Calgary (approx. 1050m above sea level) the atmospheric pressure is approximately 670 </span>mm Hg<span>, and </span>water<span> boils at about 96.6°C.</span>
Depending on the testing process being used, it may affect the object by making it shape differently, scratch, it or sometimes do absolutely nothing. hope this helps:)
