Answer: hydrogen and carbon
Explanation:
Organic compounds are those compounds that contain carbon bonded to hydrogen.Example: is an organic compound as it contains C-H bond.
Inorganic compounds are those compounds that do not contain carbon or contain carbon not bonded to hydrogen. They might contain other elements such as nitrogen or oxygen. Example:
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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Is this method CORRECT
Answer:
yes
Explanation:
Answer:
Chemists use a solution called Universal Indicator to identify acids and bases. ... The Universal Indicator Color Guide shows that Universal Indicator turns red when it is added to a strong acid, it turns purple when it is added to a strong base, and it turns a yellowish-green when it is added to a neutral solution.
Explanation:
Answer:
Phenolphthalein
Explanation:
Answer:
For A: The percent yield of sodium carbonate is 70.5 %
For B: The percent of sodium hydrogen carbonate in the unknown mixture is 15.26 %
Explanation:
To calculate the number of moles, we use the equation:
.....(1)
Given mass of sodium hydrogen carbonate = 2.765 g
Molar mass of sodium hydrogen carbonate = 84 g/mol
Putting values in equation 1, we get:
The chemical equation for the thermal decomposition of sodium hydrogen carbonate follows:
By Stoichiometry of the reaction:
2 moles of sodium hydrogen carbonate produces 1 mole of sodium carbonate
So, 0.033 moles of sodium hydrogen carbonate will produce = of sodium carbonate
Now, calculating the mass of sodium carbonate from equation 1, we get:
Molar mass of sodium carbonate = 106 g/mol
Moles of sodium carbonate = 0.0165 moles
Putting values in equation 1, we get:
To calculate the percentage yield of sodium carbonate, we use the equation:
Experimental yield of sodium carbonate = 1.234 g
Theoretical yield of sodium carbonate = 1.75 g
Putting values in above equation, we get:
Hence, the percent yield of sodium carbonate is 70.5 %
To calculate the percentage composition of sodium hydrogen carbonate in mixture, we use the equation:
Mass of mixture = 2.968 g
Mass of sodium hydrogen carbonate = 0.453 g
Putting values in above equation, we get:
Hence, the percent of sodium hydrogen carbonate in the unknown mixture is 15.26 %
(B) specific gravity
(C) vapor pressure
(D) viscosity
(E) freezing point