Explanation:
Photosynthesis is the process whereby green plants uses light energy to manufacture food using carbon dioxide and water to produce energy rich glucose and oxygen gas as a bye - product.
The equation is given below:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
In the reaction above, the number of moles are:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
6 6 1 6
The reaction shows that 6 moles of carbon dioxide combines with 6 moles of water to give one mole of glucose and 6 moles of oxygen gas;
We can say that:
To produce 1 mole of glucose, we need 6 moles of carbon dioxide
1 mole of glucose, we need 6 moles of water
6 moles of oxygen gas we need 6 moles of carbon dioxide
6 moles of oxygen gas we need 6 moles of water molecules
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Answer:
Ca2+ represents an ion with 20 protons and 18 electrons.
Explanation:
A calcium atom has 20 protons and 20 electrons. The 2+ charge next to the symbol indicates a loss of two electrons: 20-2=18.
Answer:
atoms of Ca.
Explanation:
Basic stoich question:
First the reaction is 
Converting grams to moles: 
Notice the mole ratio. For every 2 Ni produced, 3 Ca was used.
of Ca.
There are 
atoms in a mole.
Thus, multiplying them together = atoms
Answer is: n<span>o, because the ion product is less than the Ksp of lead iodide. </span>
Chemical dissociation 1: KI(s) → K⁺(aq) + I⁻(aq).
Chemical dissociation 2: Pb(NO₃)₂(s) → Pb²⁺(aq) + 2NO₃⁻(aq).
Chemical reaction: Pb²⁺(aq) + 2I⁻(aq) → PbI₂(s).
Ksp(PbI₂) = 7.1·10⁻⁹.
V = 500 mL ÷ 1000 mL/L = 0.5 L.
c(KI) = c(I⁻) = 0.0025 mol ÷ 0.5 L.
c(I⁻) = 0.005 M.
c(Pb(NO₃)₂) = c(Pb²⁺) = 0.00004 mol ÷ 0.5 L.
c(Pb²⁺) = 0.00008 M.
Q = c(Pb²⁺) · c(I⁻)².
Q = 8·10⁻⁵ M · (5·10⁻³ M)².
Q = 2·10⁻⁹; <span> the ion product.</span>
Answer:
B. He should report the accident and leave the area.
Explanation:
Noxious gases are harmful and might cause hallucination or even death. Examples of such gases carbon monoxide (CO) and Ammonia gas (NH3).
Let's look at all the options
- All the solutions except for B is increasing his time of contact with the gas. This will increase his exposure and might cause death.
- The fire blanked in option A is used to cover the fire and NOT the gas. It’s simply not made for it. Also, the blanket material might react with the gas to create additional fumes.
- He should not neutralize it with water as the solution might contain a group 1 metal e.g. Na (sodium). In that case the container will explode and hydrogen gas will release.
- Pouring the solution down the sink won’t stop the gas as the reaction has occurred already. It will only make the situation worse as after pouring the mixture, the gas will get more space to spread across the room.
<u>Therefore, He should report the accident and leave the area.</u>
