Select all that apply. Organic compounds must contain: hydrogen carbon oxygen nitrogen

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Answer 1
Answer: Select all that apply. Organic compounds must contain carbon. Organic molecules mean that chemical compounds contain carbon in them. Organic also refers to living organisms. So originally, the term organic molecules are found in living things. Carbon can also bond with other four atoms because of its outer shell that has four electrons. This is the reason why organic molecules can be so large because of this bonding. For example, we need proteins in our body in order to perform the necessary functions to live. Proteins are made up of nucleic acids. And nucleic acids have a carbon-nitrogen-hydrogen bond in it
Answer 2
Answer:

Answer: hydrogen and carbon

Explanation:

Organic compounds are those compounds that contain carbon bonded to hydrogen.Example: CH_4 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: CO_2


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Is tomatoe juice acidic?

Answers

Tomatoes are acidic in the mouth and stomach, yet their Alkaline residue Alkalizes
no it is not an acid is more like lemons

Mr. Smith wanted to see if the color of light shined on a plant had an effect on the number of leaves it had. He gathered 2 groups of the same species of plants, gave them the same amount of water, and did the test for the same amount of time. On one group of plants he used white light. For the second group he changed the light color to red.

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Final answer:

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.

Explanation:

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.

Learn more about Effect of Light Color on Plant Growth here:

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No of H atoms in 2.43 g of Aspartame(C^14H^18N^2O^5

Is this method CORRECT

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Answer:

yes

Explanation:

What turns colour in an acid and base

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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:

A.) Thermal Decomposition of 2.765 g NaHCO3 yields 1.234g of a solid Na2CO3 . Calculate the theoreticial yield and percent yield of Na2CO3.B) Thermal decomposition of 2.968 g of a mixture containing NaHCO3 lost 0.453 g . Calculate the percentage of NaHCO3 in this unknown mixture

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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:

  • For A:

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}     .....(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:

\text{Moles of sodium hydrogen carbonate}=(2.765g)/(84g/mol)=0.033mol

The chemical equation for the thermal decomposition of sodium hydrogen carbonate follows:

2NaHCO_3(s)\rightarrow Na_2CO_3(s)+CO_2(g)+H_2O(g)

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 = (1)/(2)* 0.033=0.0165mol 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:

0.0165mol=\frac{\text{Mass of sodium carbonate}}{106g/mol}\n\n\text{Mass of sodium carbonate}=(0.0165mol* 106g/mol)=1.75g

To calculate the percentage yield of sodium carbonate, we use the equation:

\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100

Experimental yield of sodium carbonate = 1.234 g

Theoretical yield of sodium carbonate = 1.75 g

Putting values in above equation, we get:

\%\text{ yield of sodium carbonate}=(1.234g)/(1.75g)* 100\n\n\% \text{yield of sodium carbonate}=70.5\%

Hence, the percent yield of sodium carbonate is 70.5 %

  • For B:

To calculate the percentage composition of sodium hydrogen carbonate in mixture, we use the equation:

\%\text{ composition of sodium hydrogen carbonate}=\frac{\text{Mass of sodium hydrogen carbonate}}{\text{Mass of mixture}}* 100

Mass of mixture = 2.968 g

Mass of sodium hydrogen carbonate = 0.453 g

Putting values in above equation, we get:

\%\text{ composition of sodium hydrogen carbonate}=(0.453g)/(2.968g)* 100=15.26\%

Hence, the percent of sodium hydrogen carbonate in the unknown mixture is 15.26 %

2NaHCO3 -> Na2CO3 + H2O + CO2 
2.765g NaHCO3/MM = moles NaHCO3 
moles NaHCO3 x (1 mole Na2CO3 / 2 moles NaHCO3) x MM Na2CO3 = theoretical yield of Na2CO3 

Percent yield is simply the actual yield/theoretical yield (x100 to put it into percentage).

MM = Molar mass (grams of substance per mol)

In order to separate two substances by fractional crystallization, the two substances must differ in which of the following?(A) solubility
(B) specific gravity
(C) vapor pressure
(D) viscosity
(E) freezing point

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I would say vapor pressure, but I could be wrong. Good luck ^^