Answer:
amine group or amino group
carboxyl group
R group or side chain
Three groups attached to the center carbon in all amino acids are:
A carboxyl groupA hydrogen atomA side chain (R group)A stock solution of calcium sulfate, CaSO4 has a concentration of 3.00 M. The volume of this solution is 150 mL. What volume of a 1.25 M solution could be made from the stock solution?
Answer: The volume of stock solution needed is 62.5 mL
Explanation:
A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.
To calculate the volume of stock solution needed, the formula used is:
[tex]C_1V_1=C_2V_2[/tex] ....(1)
where,
[tex]C_1\text{ and }V_1[/tex] are the concentration and volume of stock solution.
[tex]C_2\text{ and }V_2[/tex] are the concentration and volume of diluted solution.
We are given:
[tex]C_1=3.00M\\V_1=?mL\\C_2=1.25M\\V_2=150mL[/tex]
Putting values in equation 1, we get:
[tex]3.00\times V_1=1.25\times 150\\\\V_1=\frac{1.25\times 150}{3.00}\\\\V_1=62.5mL[/tex]
Hence, the volume of stock solution needed is 62.5 mL
The Ideal Gas Law is as follows: PV = nRT.
Rearrange the equation for each variable.
P =
V=
n =
R=
T =
Answer:
p=nRT/V
v=nRT/P
n=PV/RT
t=PV/nR
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the
percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur
trioxide, 1.55 g of ammonia, and 0.804 g of water.
Answer:
Explanation:
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Determine the percent yield when 3.78 g of ammonium sulfate forms from the reaction of 2.51 g of sulfur trioxide, 1.55 g of ammonia, and 0.804 g of water. Can you please show step by step on how you got the answer thanks!
-
First, the balanced equation:
1 SO3 + 2 NH3 + 1 H2O --> 1 (NH4)2SO4
Find the limiting reactant using molar masses and mole ratios
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) = 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3) = 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O) = 0.04462 mol (NH4)2SO4
Therefore, the limiting reactant is sulfur trioxide.
Now find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4) = 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
Therefore, percent yield = 91.3%
hoppe it helps
Sulfur trioxide, ammonia gas, and water will react to form ammonium sulfate. Hence,the percent yield is 91.3%.
What is percent yield ?
The percentage yield displays the amount of product produced in relation to the maximum mass. The proportion of atoms in the reactants that go on to produce the intended product is determined by the reaction's atom economy.
The balanced chemical equation is as follows:
1 SO3 + 2 NH3 + 1 H2O ⇒ 1 (NH4)2SO4
Find the limiting reactant by using molar masses and mole ratios as follows:
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3)
= 0.03135 mol (NH4)2SO4
1.55 g NH3 (1 mol NH3 / 17.04 g NH3) (1 mol (NH4)2SO4 / 2 mol NH3)
= 0.04548 mol (NH4)2SO4
0.804 g H2O (1 mol H2O / 18.02 g H2O) (1 mol (NH4)2SO4 / 1 mol H2O)
= 0.04462 mol (NH4)2SO4
Hence, the limiting reactant is sulfur trioxide.
Then, find the theoretical yield of (NH4)2SO4.
2.51 g SO3 (1 mol SO3 / 80.06 g SO3) (1 mol (NH4)2SO4 / 1 mol SO3) (132.16 g (NH4)2SO3 / 1 mol (NH4)2SO4)
= 4.14 g (NH4)2SO4
Actual yield / Theoretical yield x 100% = Percent yield.
percent yield = 91.3%
Thus, the percent yield is 91.3%.
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For the reaction shown, how many moles of CO2 are formed by the complete reaction of 0.0534 mol of
C2H6O?
C2H6O(g) + 3 O2(g) → 2 CO2(g) + 3 H2O(g)
Answer:
0.1068 moles of CO₂
Explanation:
The given reaction is presented as follows;
C₂H₆O(g) + 3O₂(g) → 2CO₂(g) + 3H₂O(g)
In the given reaction above, 1 mole of C₂H₆O react with 3 moles of O₂ to produce 2 moles of CO₂ and 3 moles of H₂O
Therefore, we have;
1 mole C₂H₆O forms 2 moles of CO₂
0.0534 × 1 = 0.0534 mole C₂H₆O will form 0.0534 × 2 = 0.1068 mole of CO₂
0.0534 mole C₂H₆O will form 0.1068 mole of CO₂.
Which is the function of protein macromolecule?
the enthalpy change of reaction is also called
a) heat of the environment
b) heat of enthalpy
c) heat of the reaction
d) enthalpy of heat
What is the highest level of complexity for a single celled organism?
Answer:
Amoeba since it can come together as a multicellular with other amoebas, but still act as one giant living cell.
Explanation: i read in a book that red-slime molds can do that. hope it wasn't too far too late recent.
Situation 1
Mass number = 35
No. of protons = 17
Net charge = -1
3.What is the atomic number?
(1 Point)
Enter your answer
4.How many neutrons are there?
(1 Point)
Enter your answer
5.How many electrons are there?
(1 Point)
Enter your answer
6.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 2
Number of protons = 35
Number of neutrons = 46
Net charge = -1
7.What is its atomic number?
(1 Point)
Enter your answer
8.What is its mass number?
(1 Point)
Enter your answer
9.How many electrons are there?
(1 Point)
Enter your answer
10.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 3
Atomic number = 37
Mass number = 85
Number of electrons = 36
11.How many protons are there?
(1 Point)
Enter your answer
12.How many neutrons are there?
(1 Point)
Enter your answer
13.What is its net charge?
(1 Point)
Enter your answer
14.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Situation 4
Mass number = 11
Number of neutrons = 6
Net charge = +3
15.What is its atomic number?
(1 Point)
Enter your answer
16.How many protons are there?
(1 Point)
Enter your answer
17.How many electrons are there?
(1 Point)
Enter your answer
18.What type of atom is it?Immersive Reader
(1 Point)
neutral
cation
anion
Answer:
3. 17
4. 18
5. 10
6. Cation
7. 35
8. 81
9. 36
10. Anion
11. 37
12. 48
13. +1
14. Cation
15. 5
16. 5
17. 2
18. Cation
Explanation:
Situation 1
The mass number = 35 = The sum of the protons and the neutrons in an atom
The number of protons = 17
The net charge = 1
3. The atomic number = The number of proton = 17
4. The number of neutrons = Mass number - Atomic number
∴ The number of neutrons = 35 - 17 = 18
5. Given that the net charge of the atom = +1, the number of electrons in the atom is 1 less than the number of protons
Therefore, the number of electrons = 11 - 1 = 10
6. Positively charged ions are called a cation
The atom is a positively charged and it is therefore it is a cation
Situation 2
The number of protons = 35
The number of neutrons = 46
The net charge = -1
7. The atomic number = The number of protons = 35
8. The mass number = The number of protons + The number of neutrons
∴ The mass number = 35 + 46 = 81
9. The number of electrons = The number of protons + 1
∴ The number of electrons = 35 + 1 = 36
10. The type of atom is an anion
Situation 3
Atomic number = 37
Mass number = 85
Number of electrons = 36
11. The number of protons = The atomic number = 37
12. The number of neutrons = The mass number - The atomic number
∴ The number of neutrons = 85 - 37 = 48
13. The net charge = The atomic number - The number of electrons
∴ The net charge = 37 - 36 = +1
14. Given that the net charge = +1, the type of atom is a cation
Situation 4
Mass number = 11
Number of neutrons = 6
Net charge = +3
15. The atomic number = The mass number - The number of neutrons
∴ The atomic number = 11 - 6 = 5
16. The number of protons = The atomic number = 5
17. Given that the net charge is +3, we have;
The number of electrons = The number of protons - The net charge
∴ The number of electrons = 5 - (+3) = 2
18. The type of atom with a net positive charge (+3) is a cation
what is one possible molecular structure of polypropylene?
Explanation:
hope it helps thanks❤
brainliest pls
What is solar cycle?
The solar cycle is an about an 11-year cycle experienced by the Sun. During the solar cycle, the Sun's behavior builds to a maximum, becoming more stormy, and its magnetic field reverses. Then, the Sun settles back down to a minimum before another cycle begins.
Hit the heart if that was what you were looking for.
Classify the type of reaction between aluminum solid and oxygen gas.
write an equation for hydrogen sulphide in aqueous solution
Answer:
This is hard because I don’t know the answer
Explanation:
I just need points
What is the molecule shown below?
A. 2,3-methylpentane
B. 3-propylbutane
C. Heptane
D. 2-butylpropane
Answer:
2,3–dimethylpentane
Explanation:
To know which option is correct, we shall determine the name of the compound.
To obtain the name of the compound, do the following:
1. Determine the longest continuous carbon chain. This gives the parent name of the compound.
2. Identify the substituent group attached to the compound.
3. Locate the position of the substituent group by giving it the lowest possible count.
4. Combine the above to obtain the name of the compound.
Now, we shall determine the name of the compound as follow:
1. The longest continuous carbon chain is 5. Thus, the parent name of the compound is pentane.
2. The substituent group attached is methyl (–CH₃)
3. There are two methyl group attached to the compound. One is located at carbon 2 and the other at carbon 3.
4. Therefore, the name of the compound is:
2,3–dimethylpentane
None of the options are correct.
answer 3 & 4
Which of the following answer describes 2-hexene? *
O structure should have 5 carbon with double bond beginning on the 2nd carbon atom
O structure should have 6 carbon with triple bond beginning on the 2nd carbon atom
O structure should have 6 carbon with double bond beginning on the 2nd carbon atom
O structure should have 5 carbon with triple bond beginning on the 2nd carbon atom
Answer:
The answer for 2-hexene is that the structure should have 6 carbon with a double bond beginning on the 2nd carbon atom.
The answer for 1-pentyne is that the structure should have 5 carbon with triple bond beginning on the 1st carbon atom.
Explanation:
2-Hexene
The structural formula for 2-hexene will have 6 carbons because the nomenclature has a -hex prefix, which stands for 6 carbons.
The -ene suffix of the nomenclature means that the organic compound is an alkene. Alkenes are hydrocarbons that contain double covalent bond and have the suffix -ene.
The double bond is on the 2 carbon atom because the nomenclature states that the double bond will be on the 2 carbon atom.
1-Pentyne
The structure will have 5 carbons since the -pent prefix means 5 carbons.
The structure has a triple bond because the -yne suffix means that the structure is an alkyne. An alkyne is a hydrocarbon with triple covalent bonds.
Also, the position of the triple bond is known because the nomenclature of the alkyne states that the triple bond is on the 1st carbon.
how many moles of KCIO3 are required to produce 58.3 grams of 02?
2 KCIO3 —> 2 KCI + 3 O2
Answer:
1.21 mol KClO₃
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesMole RatioStoichiometry
Analyzing reactions rxnUsing Dimensional AnalysisExplanation:
Step 1: Define
Identify variables
[rxn] 2KClO₃ → 2KCl + 3O₂
[Given] 58.3 g O₂
[Solve] mol KClO₃
Step 2: Identify Conversions
[rxn] 2 mol KClO₃ → 3 mol O₂
[PT] Molar Mass of O: 16.00 g/mol
Molar Mass of O₂: 2(16.00) = 32.00 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 58.3 \ g \ O_2(\frac{1 \ mol \ O_2}{32.00 \ g \ O_2})(\frac{2 \ mol \ KClO_3}{3 \ mol \ O_2})[/tex][DA] Divide/Multiply [Cancel out units]: [tex]\displaystyle 1.21458 \ mol \ KClO_3[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.21458 mol KClO₃ ≈ 1.21 mol KClO₃
What are 1A, 3B, and 7A examples of on the periodic table?
groups.
numbers
periods
O rows
Answer: Groups
Explanation:
I took the quiz
What is another term for a Static Load?
Answer: static charge
Explanation:
Answer:
Explanation:
static load, also called the holding load, is the force that will be applied to the linear actuator when it is not in motion.
can we call ionic compounds, covalent compounds? if yes then why?
Answer: No
Explanation: We can not call all iconic compounds covalent.
This chemical reaction follows the law of conservation of mass. CaO(s) + CO2(g) - CaCO3(s) How much CaCO, will be formed if 2.2 grams of CaO are used for this reaction? Assume there are enough reactants to complete the reaction. The final answer should be rounded to one place after the decimal point.
4.3 grams 2.2 grams 1.1 grams 3.9 grams
please answer quick!
Answer:
the answer is 1.1grams is the currect ans
According to the law of conservation of mass, 1.1 grams of calcium carbonate are formed if 2.2 grams of CaO are used for this reaction.
What is law of conservation of mass?According to law of conservation of mass, it is evident that mass is neither created nor destroyed rather it is restored at the end of a chemical reaction .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Antoine Lavoisier in the year 1789.If 56 g CaO gives 46.2 g calcium carbonate then 2.2 g CaO will give 2.2×46.2/56=1.1 g.
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A radioactive sample has an activity of 450 cpm three half lives after the initial activity was determined. What was the original activity?
Answer:
original activity is 3600 cpm
Explanation:
3 half-lives = 450 cpm
2 half-lives = 900 cpm
1 half-life = 1800 cpm
answer = 3600 cpm
When choosing a respirator for your job, you must conduct a _____ test.
A) Weight
B) Breathing
C) Fit
D) Practice
Is 1 mole of Na equal or not equal to Avogadro's number?
Answer:
nooooo it is not equal to it
I need the answer fast plzzz!! NO LINKS
Answer:
your answer is 12 hope it's correct answer
How have organisms changed over time, according to the fossil record?
Answer:
As the world changes, plants and animals change with it. Aside from a few living fossils, the species we see today are very different from species that lived in the past. Thus, the fossil record can be used to show that organisms changed to meet new conditions. This is the result of evolution of species over time.
hope this helps
have a good day :)
Explanation:
1. Determinati masa moleculara, raportul atomic si raportul de masa pentru oxidul de aluminiu 2. Determinati compozutia procebtuala al hidroxidului de sofiu sau sofa cauxica, 3. Determinati ce cantitate calciu este cuprinds in 112 grame oxid de calciu 4. Determinati ce cantiate de sulf in 490 de grame de acid sulfuric
Answer:
im solving now
Explanation:
Why do nurses need to understand chemistry?
A. Chemistry helps them understand how germs transmit disease.
B. Chemistry helps them keep accurate health records.
C. Chemistry helps them understand how medicines work.
D. Chemistry helps them learn the parts of the body.
Option D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.
Why do nurses need to understand chemistry?
Chemistry exists as the branch of science that contracts with the properties, composition, and arrangement of elements and compounds, how they can vary, and the energy that exists released or absorbed when they change.
Nurses must utilize organic chemistry to determine how the bodies of their patients metabolized glucose, and how the body responds to it. On a more complex level, nurses must cause conclusions based on their knowledge of organic chemistry to help protect the lives of their patients.
Hence, Option D. Chemistry helps them learn the parts of the body is the reason need to understand chemistry.
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An experiment was conducted and students observed that a solution had a hydroxide concentration of 7.0 x 10-2 .What is the pH? is the substance acidic or basic?
Answer:
The pH of the solution is basic
Explanation:
as one of the characteristics of the base is to increase the OH concentration in a solution so if the solution has low concentration of OH this means that the solution is basic
What is the energy transformation from wind to usable energy
Answer:
A turbine takes the kinetic energy of a moving fluid, air in this case, and converts it to a rotary motion.
Explanation:
If the limiting reactant in a chemical reaction is impure, what will happen to the percentage yield of the product?
Answer:
it may also become impure,I think.
Tides are caused by the pull of gravity by the _____ and the _____.
(fill in the blanks)
tides are caused by the gravitational force of the sun and the moon