Answer:
Below
Explanation:
1 meter = 100 cm
Volume = 100 cm * 100 cm * 2 cm = 20 000 cm^3 = 20 000 ml
mass = volume * density
= 20 000 ml * 1.42 g/ ml = 28400 g ( or 28.4 kg)
If you were to perform this reaction and actually produced 10.86 g of H2O, what would be your percent yield? (Your theoretical/expected yield is the amount produced from your limiting reactant.)
42.22 %
55.43 %
99.99 %
32.86 %
Other:
If the reaction were performed and actually produced 10.86 g of H₂O, the percent yield would be 52.54%.
What is the percent yield of a reaction?The percent yield of a reaction is the ratio of the actual yield of a reaction and the theoretical or expected yield of a reaction as obtained from the equation of the reaction expressed as a percentage.
Mathematically:
Percent yield = actual yield / theoretical yield * 100%The theoretical yield of the reaction from the equation of the reaction given below is 20.67 g
Equation of reaction:
Ca(OH)₂ ---> CaO + H₂O
Percent yield = 10.86/20.67 * 100%
Percent yield = 52.54%
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Complete question:
If 85.0 grams of Ca(OH)2 are used in this reaction, how many grams of water would be produced?
If you were to perform this reaction and actually produced 10.86 g of H2O, what would be your percent yield? (Your theoretical/expected yield is the amount produced from your limiting reactant.)
which of the following forces stabilize protein 3-dimensional structure? choice 1 of 6:ionic interactions choice 2 of 6:h-bonding choice 3 of 6:van der waals forces choice 4 of 6:metal ions choice 5 of 6:disulfide bonds choice 6 of 6:all of the above
All of the above forces (ionic interactions, H-bonding, van der Waals forces, metal ions, and disulfide bonds) play a role in stabilizing the 3-dimensional structure of proteins. Thus, the correct answer is Choice 6 of 6: all of the above.
Ionic interactions occur between positively and negatively charged amino acid residues, which helps to maintain the overall charge balance of the protein. H-bonding involves the sharing of electrons between atoms, and helps to hold the protein's secondary and tertiary structures in place. Van der Waals forces are relatively weak interactions between atoms, but they can contribute to the stability of the protein by helping to hold the atoms in place. Metal ions can also play a role in stabilizing the protein by binding to specific amino acid residues. Disulfide bonds form between cysteine residues and help to hold the protein's tertiary structure in place.
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to the best of your knowledge, classify each of the following as an element, compound, or mixture. explain how your everyday experiences influenced your response. a. silver coin b. air c. coffee d. soil
a. Silver coin - Element (Silver is a pure element and is not chemically combined with any other element in a silver coin)
b. Air - Mixture (Air is a mixture of gases, primarily nitrogen and oxygen, with trace amounts of other gases and particles)
c. Coffee - Mixture (Coffee is a mixture of various compounds such as water, caffeine, and organic compounds that give it its flavour and aroma)
d. Soil - Mixture (Soil is a mixture of various substances such as minerals, organic matter, water, and air)
My everyday experiences influenced my response because I have come across these examples in my daily life and have been taught about them in science classes. For example, I know that air is composed of different gases and particles, and that soil is made up of a mixture of substances, including minerals and organic matter. Similarly, I know that a silver coin is made of pure silver and that coffee is made of various compounds.
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