O is a blood donor
AB receiver
I think the answer would be A because O is oxygen and it has 7. Although it’s in parentheses and has a 2 on the outside of those parentheses, so you would multiply and 7 x 2 = 14. 14 is larger than the other ones.
Hopefully I’m right and hopefully that helps.
Whether water is frozen, in a gaseous state, or is a liquid, it is still H2O. So the chemical composition does stay the same.
A girl cycles for 3.00 hrs at a speed of 40.0 km/h. What distance did she ... A train travels at a speed of 30.0 km/hr and travel a distance of 240 km.. How long did it take the ... If a car travels 400 m in 20 seconds how fast is it going? Givens ... is in m/s2. 1. A man hits a golf ball (0.2 kg) which accelerates at a rate of 20 m/s2.
Answer is: tin and zinc, because they standard potential as less than zero.
Tin and zinc are oxidized to tin and zinc cations (with +2 charge) and hydrogen anions are reduced to hydrogen molecules with neutral charge.
Zn → Zn²⁺ + 2e⁻; 2H⁺ + 2e⁻ → H₂.
<span>Oxidation is increase
of oxidation number and reduction is decrease
of oxidation number.</span>
