The color of light affects plants' growth and leaf production due to the role of different light colors in photosynthesis and the phytochrome system in plants. Chlorophyll mainly absorbs red and blue light from the light spectrum for photosynthesis, and far-red light can slow plant growth. Therefore, exposure to different light colors could result in different numbers of leaves.
The subject of the question is how the color of light affects the growth of plants, specifically the number of leaves plants produce. This experiment is primarily about the effect of light on plant's photosynthesis, a process that uses light to convert carbon dioxide and water into glucose. The glucose is utilized to fulfill various energy requirements of the plant's growth, including the growth of leaves.
Light has diverse wavelengths, with each color representing a different wavelength. While white light contains all the possible color wavelengths, the red light specifically contains a higher wavelength region. According to Sir Isaac Newton's experiment, sunlight, which looks white to us, contains all the colors of the spectrum.
In this context, the phytochrome system in plants plays a crucial role. Chlorophyll, the green pigment in leaves, absorbs mainly red and blue light from the light spectrum and uses that energy for photosynthesis. However, far-red light, which is one element of white light, is not absorbed. If a plant is exposed more to far-red light, it could slow its growth.
Consequently, the difference in the number of leaves that Mr.Smith observed in the plants under white light and those under red light might be due to the role of light color in photosynthesis and the phytochrome system in plants.
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the theoretical yield of hydrogen gas is 10 g
calculation
Step 1: write the equation for reaction
Zn + 2 HCl → zncl₂ + H₂
Step 2: use the mole ratio to find the moles of H₂
from equation above Zn : H₂ is 1: 1 therefore the moles of H₂ = 5.00 moles
Step 3: find the theoretical yield(mass) for H₂
mass = moles × molar mass
from periodic table the molar mass of H₂= 1×2 = 2 g/mol
mass = 5 moles × 2 g/mol = 10 grams
Answer:
Explanation:
Answer:
is a product of a condensation reaction.
Explanation:
In a condensation reaction, two molecules are combined to produced a large molecules along with removal of a water molecule.
For an example, let's consider aldol condensation reaction.
In aldol condensation reaction, an enolate anion reacts and combines with an aldehyde or ketone molecule follwed by dehydration. In that dehydration step , gets removed and an unsaturated carbonyl product is formed.
Usually, are produced as a by product of a decomposition reaction.
Answer:
Explanation:
1. Gather all the information in one place
M_r: 22.99
2Na + 2H₂O ⟶ 2NaOH + H₂
T = 25.0 °C
V = 246 mL
2. Moles of H₂
To find the moles of hydrogen, we can use the Ideal Gas Law:
pV = nRT
(a) Calculate the partial pressure of the hydrogen
(b) Convert the volume to litres
V = 246 mL = 0.246 L
(c) Convert the temperature to kelvins
T = (25.0 + 273.15) K = 298.15 K
(d) Calculate the moles of hydrogen
3. Moles of Na
The molar ratio is 2 mol Na: 1 mol H₂
4. Mass of Na
The number of grams of sodium used in the reaction will be approximately 0.1387 grams.
To calculate the number of grams of sodium used in the reaction, we need to use the ideal gas law and consider the effect of the vapor pressure of water on the pressure of the collected hydrogen gas.
Given data:
Volume of hydrogen gas (V) = 246 mL = 0.246 L
Pressure of hydrogen gas (P) = 1.00 atm
Vapor pressure of water (P_water vapor) = 0.0313 atm (subtracted from the total pressure)
Temperature (T) = 25.0°C = 298.15 K
The ideal gas law is given by the equation: PV = nRT, where n is the number of moles of the gas.
First, calculate the total pressure by subtracting the vapor pressure of water from the given pressure of the gas:
Total pressure (P_total) = P - P_water vapor
= 1.00 atm - 0.0313 atm = 0.9687 atm
Now, rearrange the ideal gas law equation to solve for n (moles of gas):
n = PV / RT
Plug in the values:
n = (0.9687 atm × 0.246 L) / (0.0821 L·atm/mol·K × 298.15 K)
n ≈ 0.01206 mol
According to the balanced chemical equation, 2 moles of sodium (Na) produce 1 mole of hydrogen gas (H₂). Therefore, the number of moles of sodium used in the reaction is half of the calculated moles of hydrogen gas:
Moles of sodium = 0.01206 mol / 2 = 0.00603 mol
Finally, calculate the mass of sodium (molar mass of sodium = 22.99 g/mol)
Mass of sodium = Moles of sodium × Molar mass of sodium
Mass of sodium = 0.00603 mol × 22.99 g/mol
≈ 0.1387 g
Therefore, the number of grams of sodium used in the reaction is approximately 0.1387 grams.
To know more about sodium here
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