6CO2 + 6H2O --> C6H12O6 +602
1. Identify evidence that a chemical reaction has occurred.
2. What element is the most abundant in this chemical reaction?
3. Identify the number of protons, neutrons, and electrons found in the most
abundant element.
4. Identify where we would find the protons, neutrons, and electrons in the
atom of this element.
5. Identify the group and period of the element on the Periodic Table.
swer
Answer:
1. The evidence that chemical reaction has occurred can be found in the change of the reagents present after the reaction, that is formation of glucose in the area where the reaction is taking place
2. The most abundant element of the chemical reaction is oxygen which has a total quantity of 18 atoms in the reaction
3. The oxygen atom has an atomic number of 8 and therefore contains 8 protons and 8 neutrons and (therefore) 8 electrons (to be neutral, electronically)
4. The protons and the neutrons of the atom, oxygen, are located in the nucleus, while the electron are found in the different orbitals surrounding the atom
5. The element, oxygen, symbol, O, belongs to the group 16 of period 2 in the periodic table
Explanation:
Answer is: the sample is 232 years old.
Take 100 atoms:
After first half-life: 50% · 100 ÷ 100% = 50.
After second half-life: 0.5 · 50 = 25.
After third half-life: 0.5 · 25 = 12.5.
After fourth half-life: 0.5 · 12.5 = 6.25.
6.25 ÷ 100 · 100% = 6.25%.
4 half-lives will it take before only about 6.25% of the original sample remains.
t = 4 · 58 y.
t = 232 y.
Anaerobic respiration
Aerobic respiration
Photosynthesis
Answer:
The correct option is: D. Photosynthesis
Explanation:
Photosynthesis is a biological process in green plants by which food such as sugar (like glucose C₆H₁₂O₆), is synthesized from water (H₂O) and carbon dioxide (CO₂) from the atmosphere, in the presence of light energy. This process produces oxygen gas (O₂) as a by-product.
This reaction converts the light energy from the sun to chemical energy.
The reaction involved is: 6 CO₂ (g) + 6 H₂O + light → C₆H₁₂O₆ (s) + 6 O₂ (g)
Photosynthesis is the only process among the given options, that produces oxygen gas.
2H2O yields 2H2 + O2
H2 + Cl2 yields 2HCl
2Li + CaO yields Li2O + Ca
CH4 + 2O2 yields CO2 + 2H2O
b. climax
c. external conflict
d. internal conflict
Answer:
When we throw a projectile up, the negative gravity acceleration acts on it. Thus, when the ball reaches the highest point, the speed of the ball becomes zero.
Explanation:
Acceleration is a vector magnitude that indicates the variation of speed per unit of time.
As displacement, velocity and acceleration are vectors we will analyze this vectorly.
We consider positive acceleration when the acceleration vector is directed in the same direction as the movement. (Acceleration)
On the other hand, we consider negative acceleration when the acceleration vector is directed in the opposite direction to the movement. (de-acceleration)